Some move as much as 12 inches below the surface. Be sure to read the insecticide product label for its instruction, post-harvest interval period and safety precautions. The grubs are the ones that eat at the roots of the grass plants. DoMyOwn has the products needed to control an infestation and prevent new beetles from invading your lawn. The immature stage of the Japanese beetle – the white grub – typically has a three year life cycle. The best time to treat Japanese beetle white grubs is July through mid-September when they are small or moderate-sized. Choosing less-favored plant species can minimize the impact of Japanese beetles in the landscape. How to Get Rid of Japanese Beetle Grubs in Fall . Lawns already under attack by grubs are best treated in early fall. Japanese Beetle (Popillia japonica) The Japanese beetle is a new arrival to Colorado and presently (2018) found in several areas of the Front Range, including most of the Denver Metro area, Boulder and Pueblo. Japanese beetles have a one-year (annual) life cycle. If you don’t want to do the treatment yourself, let your local Minneapolis lawn care specialists (that’s us) help you by filling out a quote request. Such traps can indeed capture large numbers of Japanese beetles, but attract many more to the general area, which can result in additional damage. Japanese beetles and northern masked chafer grubs are the predominant damaging white grub species associated with home lawns. We live in a fast-paced society where high stimulation is more and more a way of life. Two treatments between June and August are generally best to solve this problem. So fight the urge to wait and get these products down 60-90 days before Japanese Beetles lay their eggs. The spores germinate inside the grubs, eventually killing them. … Japanese beetle larvae can be controlled with certain insecticides or by insect parasitic nematodes. Managing Japanese Beetle Adults & Grubs While Minimizing Impacts on Pollinators. This will minimize the spray impact on any foraging bee activity during application periods. Japanese beetle grubs can be sampled in late summer (August to October) and late spring (April to June). The bottom line is that grubs are too large to treat now. Following are some best management options to control Japanese beetle adults and grub that can minimize impacts on pollinators: ... Mow any flowering weeds before scheduling liquid applications of preventive or curative grub treatment products in turf areas. Stage 4 Adult: June – August. The primary grub control treatment should be done in late summer before damage becomes apparent (mid-July to August). It was first found in the United States in New Jersey in 1916. 3). As they get larger, it is more difficult to kill them and by fall it is no longer practical to manage them. How to Treat Japanese Beetles & Grubs: Stage 1 Dormant Grub: October – March. Once applied, milky spore powder will work it way into the soil where it will be ingested by the Japanese beetle grubs. To fight Japanese beetles at the grub stage as well as adults, Sevin ® Insect Killer Granules works above and below the surface to kill beetle larvae along with more than 100 other insect pests. However, it is the soil-residing grub stage of beetles that we regularly find in and around the landscape (June beetles, masked chafers, etc.) A common active ingredient is Dylox. Japanese beetle traps can capture many adults have never been shown to reduce damage to nearby plants. Come March, lawns already under attack by grubs are best treated in early spring or fall. Therefore, treating your lawn one year as a mechanism for preventing adult beetles the following year will not work. If there are more than a dozen grubs in this small area, consider treating your lawn with some type of grub control. The Japanese beetle adult females lay their eggs in grassy areas all over the county and not exclusively in your lawn. Curative treatments applied in late summer or early fall are more effective than spring applications because the grubs are smaller and easier to control. It won’t hurt earthworms or even a bird that eats a grub that has the disease. These C-shaped, grayish-white grubs have tan heads and visible jointed legs. Adults are best controlled by handpicking or by use of certain insecticide sprays. Timing will vary by geographic location. Visit your Blain's Rewards to use this card in-store, track your point totals and more! Come March, lawns already under attack by grubs are best treated in early spring or fall. However, most of the damage to ornamentals and turf grass happens during the spring and fall the second year. Organic insecticides containing azadirachtinor pyrethrins can be sprayed on landscape plants in late evening once pollinator activity subsides. Controlling Japanese beetle grubs is a smart way to protect your lawn. (Bumblebees do not make grubs! Origin and distribution. Mowing of flowering weeds is not needed if using granular or pelleted grub treatment products in the turf followed by light irrigation to move the product into the thatch layer. Hand-picking or knocking the beetles into a container of soapy water can be helpful for small plants when limited numbers of adult beetles are present in a yard or garden. Larvae of several species of scarab beetles, including the Japanese beetle, feed on roots of conifer seedlings and transplants. Contact a lawn and ornamental professional for guidance and assistance to control Japanese beetle populations. Be sure to read the insecticide product label for its instruction and safety precautions. It has low toxicity to bees, other pollinators, pets, and humans. A great choice would be a treatment that controls grubs and Japanese beetles at least a complete season. Japanese beetle larvae are a type of white grub that feeds on the roots of grasses. Grubs in the soil come in contact with the spores through ingestion. Btg has a broad label and can be used on a wide range of vegetables and fruits. It can be found in the product beetleGONE!, which is approved for organic production. This will minimize the spray impact on any foraging bee activity during application periods. Other option is to use the reduced risk insecticide product Acelepryn followed by light irrigation as preventive grub treatment application in turf. Stage 2 Feeding Grub: March – April. The Japanese beetle, Popillia japonica Newman, is a native of Japan. Japanese beetle grubs can be sampled in late summer (August to October) and late spring (April to June). Whatever the reason, if your lawn is showing signs of being under attack from grubs in early fall then a curative treatment will help manage your grub problems. that might be contributing to problems very soon. Grubs do not typically affect turf type tall fescue lawns. By Vijai Pandian, UW Madison Extension and PJ Liesch, UW Madison Entomology . However, it simply doesn’t work that way. The adult beetle continues to feed, mate and lay eggs in the soil and turf until up to 60 eggs are laid. Japanese beetle and June bug grubs are hatching right now and if you kill them before they grow to be large, tough, indestructible grubs, you’ll be way ahead of the game. This may help in preventing the adult beetles from laying their eggs in dry turf areas. BioAdvanced Season Long Grub Control Plus Turf Revitalizer. Japanese beetle develop from grubs that fed on organic matter and/or the roots of plants last fall and this spring. These products last 3-4 months and should be applied in the beginning of June to help prevent grub worms. In fact, 2017 was the year when the highest populations were recorded thus far. Lastly, I believe in … To minimize the stress of defoliation on sensitive tree species, boost plant health during the growing season with water, nutrients and other proper tree care practices. When fighting this serious pest, it’s important acknowledging that both an adult and immature form are dangerous. Of most concern is the Japanese beetle, a voracious feeder on the foliage of many ornamental and garden plants that often warrants treatment as an adult. Although the peak of adult feeding has passed for 2017, the last of the adults will be around for another 2 weeks. As adult feeding subsides, the white grub stage will take over. The best way to control adult beetles is to make a preemptive strike, in the spring, well in advance of the adults emerging. A biological treatment method, useful against only Japanese beetle grubs, is the application of milky spore bacteria. These white, C-shaped grubs feast on organic matter in the soil, including grass roots. The Japanese beetle (Popillia japonica) is a species of scarab beetle.The adult measures 15 mm (0.6 in) in length and 10 mm (0.4 in) in width, has iridescent copper-colored elytra and a green thorax and head. Preventive treatments are the most effective and are applied in late June and early July as eggs are first being laid. Grubs are the larval stage for many types of beetles in the scarab family–not only the Japanese Beetle but May and June Beetles, Asiatic garden beetles and brown chafers. The majority of grub worms come from Japanese beetles, which lay their eggs in midsummer in sunny areas of the lawn. It’s the white, C-shaped larvae of European chafers, Japanese beetles, June beetles, as well as other beetles, and is about three-quarters-of-an-inch long. Bayer Advanced 12 Month Tree & Shrub Insect Control or All-in-One Rose & Flower Care are best. The best time to treat Japanese beetle white grubs is July through mid-September when they are small or moderate-sized. For Japanese Beetle grub control, apply in late July or early August, when the grubs are beginning to emerge to help eliminate next years’ population. Figure 1. Spring treatment is less effective as grubs feed less at that time. If you haven’t made such a preemptive strike and the beetles are feeding, products that kill on contact and provide systemic protection are most effective. Japanese Beetle Larva/Grub Three Japanese Beetles feeding on a wild rose blossom; Seal Harbor, ME – August 7, 2020 Japanese Beetles Japanese Beetles on highbush blueberry A cluster of Japanese Beetles Japanese Beetle on a milkweed plant Japanese Beetle with four eggs from a parasitic fly called a tachinid fly. Japanese beetle grubs tend to be most common in new developments with bluegrass sod. In fact, 2017 was the year when the highest populations were recorded thus far. Control is usually rapid (days after treatment) and infected grubs turn a reddish-brown color. Several other white grub species including Asiatic garden beetle, European chafer, green June beetle, May and June beetles, and Oriental beetle are occasionally observed in home lawns and may cause significant damage. June beetles are brown, shaped similarly but a little bit more rounded, like a loaf of bread. However, it is the soil-residing grub stage of beetles that we regularly find in and around the landscape (June beetles, masked chafers, etc.) Japanese Beetle: This introduced pest is now found in most states east of the Mississippi River except Florida. Starting in June try Bayer Advanced Dual Action Rose & Flower Insect Killer. This form of life cycle is called complete metamorphism. The grubs you have in CO are June-beetle larvae – kissing-cousins to the Japanese beetles – their grubs are identical. We sent a confirmation email to this rewards account. Mature larvae are 1–2 inches (25–55 mm) in length. BioAdvanced Grub Killer Plus is a great product that is easy to track down. Japanese beetles and northern masked chafer grubs are the predominant damaging white grub species associated with home lawns. Granular residuals containing insecticides distributed on soil with a spreader are usually the best applications for Japanese beetles. Preventive treatments are the most effective and are applied in late June and early July as eggs are first being laid. Some recent grads may not want to attend a four-year college. Several other species, such as May beetles and June beetles, are also present but usually in low numbers. For large trees with defoliation concerns, it is advisable to consult a certified arborist about management options. Japanese Beetles will emerge from the larva stage in early June, eat your lovely flowers and shrubs and mate until late July. Small grubs are easily killed at this time of year by applying products containing trichlorfon. As you can see in the handy chart below, a grub’s life cycle begins in the summer, when adult Japanese beetles lay eggs underneath the soil. Plants like arborvitate, boxwood, clematis, dogwood, forsythia, hemlock, hickory, holly, juniper, lilac, magnolia, northern red oak, pine, red maples, sweet gum, tulip tree, and yews have shown lesser feeding damage to Japanese beetle. Japanese beetles will survive and emerge from so many places surrounding you and your property, that what you do to the … One application of Scotts® GrubEx® 1 can kill and prevent grubs for up to 4 months. In spring or early summer, apply a preventative grub control product, such as Scotts® GrubEx® 1 to your lawn, following label directions. Some target pests that have been controlled (to varying extents) by H. bacteriophora in field tests are white grubs, Japanese beetle, grubs, northern masked chafer, black vine weevil, strawberry root weevil, citrus root weevil, Colorado potato beetle, cucumber beetles, red imported fire ant, several other soil-inhabiting insects, and filth fly maggots in manure. Japanese Beetle Grub Control Benefits. Stage 5 Egg: July – September. Some move as much as 12 inches below the surface. Article written by Vickie Leflore, Youth Development Extension Educator. Grub Worm Identification and treatment. These eggs eventually hatch into grubs and the cycle begins again. Prevention & Maintenance Tips These treatment thresholds can vary depending on the kind of white grub present. Milky spore comes in two formulations, granules and powder. Grubs are found lying on their sides in the form of a "c" when exposed. Having the ability, or perceived ability, to do several things simultaneously is how many of us attempt to keep up with high demands at work, home and everywhere in between. Though most beetles lay their eggs in the spring, the fall is the best time to treat for lawn grub infestations. Physical Control Where there is one Japanese beetle, there will soon be ten, so hand picking the earliest arrivals can help keep numbers down significantly. So to know if you are treating just the Japanese Beetle larvae, you have to really know the life cycle. Apply Bayer Advanced 24 Hour Grub Killer Plus for fast results. (To find a certified arborist, visit. The active ingredient in this grub preventer is Imidacloprid. Right around late July or early August, Japanese beetle eggs become lawn grubs that eat your grass all winter. (Referenced from Iowa State University Extension). Japanese Beetle. Remember that Bayer Advanced Season Long Grub Control is great to use all season. Milky spore comes in two formulations, granules and powder. A preventive grub insecticide (with an active ingredient containing imidacloprid, halofenzide, clothianidin or thiamethoxam) can be scheduled for application to lawns before the end of July to prevent eggs from hatching. Adult Japanese beetles emerge from the soil and begin feeding on many types of plants and ornamentals, leaving skeletonized leaves. Repeat the application as needed according to the product label until the beetle activity subsides for the season. Grub Worms or more specifically; white grubs are the larvae of scarab beetles. For grub prevention I recommend using one of these two products: 1. This is why it is important to identify the grub before deciding to treat. The granules must be applied multiple times over two years using a spreader. Please enter the confirmation code we emailed you to continue. So, look for these signs of grub damage, then apply this control. Read the product label for spray application instruction. So, look for these signs of grub damage, then apply this control. Traps are … BioAdvanced 24 - Hour Grub Killer Plus Granules, BioAdvanced Tree and Shrub Protect and Feed Concentrate, BioAdvanced All - In - One Rose and Flower Care, BioAdvanced Dual Action Rose and Flower Insect Killer, 1 Point for Every $1 Spent - that's 1% back. Remember that not every garden with a Japanese beetle problem has a lawn full of grubs. Step 6 Feeding Larva:  August – October. Adult beetles are active during the daytime and can fly an average of 1 to 2 miles. Roses, birches, lindens, grapes, raspberries, Norway … The grub changes into the pupa, which is the resting stage, and the pupa then changes into the adult beetle. How to Control Adults. Eggs are laid in July, hatch in mid-August, and the grubs immediately start feeding on grass roots. If you have repeated intense infestations of Japanese beetles, check your soil in late summer to see if you have a large grub population. If you’ve had grub problems in the past, you will most likely need an annual preventative control program to help eliminate grubs and prevent further damage to your Minneapolis, MN lawn. Grubs are easiest to control when they are young, so take preventative action in late spring through early summer. The full-grown Japanese beetle grub and northern masked chafer grub reach a length of 1 inch. Grubs burrow deep into the soil and rest through the winter. Therefore, it seems logical that killing adult beetles one year should prevent grub damage the next. Rather than have to crop this powder over your lawn, worrying about timing and frequency, you can leave it to us. The Japanese beetle is consistently the most damaging grub in this state. There are several easy-to-spot signs that you may have grubs in your lawn: Raccoons, skunks, armadillos, or birds are digging up your yard. These animals all love to dine on large, mature grubs. Grubs rise from their winter rest and begin feeding on roots, causing extensive damage to turf grasses. Knowing how to detect grub worms is key to treating them. Taking care of this problem is simply a matter of how to detect grub worms and when to apply grub worm treatment. Right around late July or early August, Japanese beetle eggs become lawn grubs that eat your grass all winter. It prevents damage to your lawn caused by Japanese beetles; It also helps prevent the damage they can cause to your trees and shrubs; Our natural grub control solution is safe for kids, pets, and environment ; Best Time For Grub Worm Treatment in Minnesota: Summer of Japanese beetle grubs per square foot in your lawn. Japanese beetle grubs can be a major turf pest. Japanese beetle activity in some parts of Kentucky this year have resembled scenes from the 1980s when this insect rolled across the state (Figure 1). To understand why this timing is best, we need to understand the life cycle of a Japanese beetle. When to apply the treatment: Here is an infographic showing the life cycle of the Japanese beetle. They will feed on grass roots for the next 4 to 6 weeks. After you remove the pest from the plant, drop it into a bucket of soapy water. Grubs lay their eggs in soil under turf, where there’s an ample supply of organic matter in the soil to eat, including grass roots. These beetles feed on surrounding plants and lay eggs in the soil throughout the summer. If your lawn has brown or dead areas during the normal growing season, survey near the edge of the damage. As they get larger, it is more difficult to kill them and by fall it is no longer practical to manage them. Protect your lawn from Japanese Beetle grubs Protect your lawn from Japanese Beetle grubs for 10-years with just 1 application guaranteed. The grubs of economic importance in North Carolina are those of the Japanese beetle, the green June beetle, the southern masked chafer, the northern masked chafer, and the Asiatic garden beetle. © 2003 - 2020 Blain Supply, Inc. Prices were current at the time of posting. Several other white grub species including Asiatic garden beetle, European chafer, green June beetle, May and June beetles, and Oriental beetle are occasionally observed in home lawns and may cause significant damage. Begin treatment as soon as beetles appear, before damage is done. Connect with your County Extension Office », Find an Extension employee in our staff directory », Get the latest news and updates on Extension's work around the state, Feedback, questions or accessibility issues: info@extension.wisc.edu | © 2020 The Board of Regents of the University of Wisconsin System Privacy Policy | Non-Discrimination Policy | Discrimination and Harassment Complaints | Disability Accommodation Requests | Civil Rights. Their adult life span is only about six weeks long, during which time the female will continually lay eggs. A biological treatment method, useful against only Japanese beetle grubs, is the application of milky spore bacteria. How to Detect Grub Worms. Roses, birches, lindens, grapes, raspberries, Norway maples, beans, apples, plums, crabapples, elms, beech, asparagus and rhubarb are some of its favorite plant species. Price: $117.25. Milky Spore is a disease that only affects Japanese Beetle grubs. Adult Japanese Beetles on a rose. Hand picking or knocking the beetles into a container of soapy water can be helpful for small plants when limited numbers of adult beetles are present in a yard or garden. They feature metallic blue-green heads, copper backs, and tan wings. Grubs will usually stop feeding and start to die within 24 hours. How & When to Treat Japanese Beetles & Grubs, Bayer Advanced 12 Month Tree & Shrub Insect Control, Bayer Advanced Dual Action Rose & Flower Insect Killer. The reports we have seen ofthe reduction of grub populations with lime applications apparently involved large areas of turf, all uniformly treated with lime and no untreated areas for comparison. Japanese beetles usually emerge in the beginning of July and can be found through September. With no effective predators and with vast land space and favorable climate, the Japanese beetle has found its new home. Japanese beetles can be easily removed from plants with your hands. Stage 1 Dormant Grub: October – March. The size of the grub depends on the species of beetle it grows into and the age of the grub. The eggs hatch and the young white grubs feed from late July and early August until the first hard frosts of fall drive them deeper into the soil. How to Get Rid of Japanese Beetle Grubs in Fall. of your white-grub problem and whether treatment is necessary. Adult Japanese beetles often return to the same area year after year to mate and lay eggs. Japanese beetle grubs can damage turfgrass in the same manner as other turfgrass white grubs. May 16, 2017 - Author: David Smitley. Late Summer to Early Fall Is the Best Time to Treat Lawn Grubs. This estimate is important for deciding the severity of your white-grub problem and whether treatment is necessary. White Grubs that hatch into Japanese Beetles. Since then they have slowly and steadily made their way westward. The Japanese beetle has become a major pest of crops, lawns, and ornamental plants in Missouri. These spores work best when applied in late … Feedback, questions or accessibility issues: Farm Fresh Atlas of Southeastern Wisconsin, Kenosha Community Food Bank and Pantry Network, Economic Development: Small Businesses and Workforce, Analysis of Downtown Storefront Improvements Study, Kenosha County Association for Home and Community Education, WI Master Gardener Program and Racine/Kenosha Master Gardener Association, https://www.treesaregood.org/findanarborist/findanarborist, Apprenticeships As A Post-High School Option, © 2020 The Board of Regents of the University of Wisconsin System, Although Japanese beetle feeding damage may be noticeable on landscape plants, well-established trees and shrubs generally tolerate damage without impacting bud emergence the following season. Article by Vijai Pandian, UW Madison Extension and PJ Liesch, UW Madison Entomology. Apply Bayer Advanced 24 Hour Grub Killer Plus for fast results. Organic insecticide containing azadirachtin or pyrethrins can be sprayed on vegetables and berry crops in late evening once pollinator activity subsides. Treatment thresholds and identification tips are discussed below in the description of each major type of grub. Japanese beetle grubs have a V-shaped raster pattern, while northern masked chafer grubs have a nondescript “random” raster pattern (Fig. Originally published in the Kenosha News. It is best starting in August to bring back out the Bayer Advanced 24 Hour Grub Killer Plus. Japanese beetle grub. They also have small white hairs lining each side of the abdomen. An EEO/AA employer, University of Wisconsin-Madison Division of Extension provides equal opportunities in employment and programming, including Title VI, Title IX, the Americans with Disabilities Act (ADA) and Section 504 of the Rehabilitation Act requirements. The best time to apply insecticides for Japanese beetle grubs is from mid-July until end of September. White grub treatment threshold is typically 8-10 grubs per square foot. The eggs hatch into grubs, which feed heavily on grass roots throughout the late summer and early fall, causing extensive damage. Lift a 1-square-foot section of turf. For those desiring to have more direct hands-on learning, exploring apprenticeship opportunities may be more advantageous. The larval stage is a C-shaped white grub similar in appearance to the June beetle, rose chafer and European chafer. These are distinctive color patterns you won’t find in any other beetle. Late Summer to Early Fall Is the Best Time to Treat Lawn Grubs. Japanese beetles like to move and feed in small groups, making them a bigger danger to your plants. Two treatments between June and August are generally best to solve this problem. By the way, this is true of almost all insect pests. We've added a virtual rewards card to your account. After mating, the females lay eggs in turf. Don't squish the beetle to kill it. Once the egg hatches, the grubs will go through three larval stages or instars during their development. Repeat the application as needed according to the product label until the beetle activity subsides for the season. Because of this, various size grubs are commonly found in the soil. This is why it is important to identify the grub before deciding to treat. Milky spore is a common grub treatment, but it will only affect Japanese beetle white grubs. The female beetles prefer to lay eggs in the soil of lawns and other turfgrass areas. To understand why this timing is best, we need to understand the life cycle of a Japanese beetle. It will usually say something like ‘kills grubs within 24 hours’ on the label. How to Prevent Japanese Beetles. Pheromone lure traps are not recommended for Japanese beetles. The Japanese beetle has become a major pest of crops, lawns, and ornamental plants in Missouri. It is an employ, Article written by Mary Metten, Health and Well-being Extension Educator. Milky spore bacteria, Paenibacillus popilliae (formerly known as Bacillus popilliae) infect only Japanese beetle grubs and have no effect on beneficial organisms. Collectively, the larvae are referred to as white grubs and are similar in appearance. You can kill all the grubs you want to – they are not larvae of any beneficial insect!) Mowing of flowering weeds is not … Established in Wisconsin in 1990’s, the Japanese beetle (Popillia japonica) is a voracious defoliator of many landscape and garden plants. Turf should not be irrigated during the beetle's active season to help prevent the insect from laying eggs there. Tree species like birch and lindens suffering from severe foliar feeding damage over years can attract native borers which can kill the stressed trees. A good indicator of a white grub infestation is skunks digging up the lawn. Control more than just grubs. The granules must be applied multiple times over two years using a spreader. Japanese beetle traps contain a pheromone that attracts both male and female beetles. The Japanese beetle white grub treatment threshold is typically 8-10 grubs per square foot. Japanese Beetles were accidentally introduced to the east coast in 1916 in a shipment of iris bulbs. An infestation can grow very quickly, requiring the use of insecticide sprays, granules, powders, and traps. These pesticides should be applied in July or August, when young grubs are feeding. Typically, Japanese beetles begin to emerge in late June and early July in WI, with peak activity for six to eight weeks. Originally published in the Kenosha News. This is when grubs are present in the top inch of the root zone, heavily feeding on grass roots and thatch. Once grubs are present, late July to September, they can still be treated but management is less effective. Established in Wisconsin in the 1990s, the Japanese beetle (Popillia japonica) is a voracious defoliator of many landscape and garden plants. When spring arrives, these grubs are still too large to try to control. According to the U.S. Department of Labor, an “apprenticeship is a proven approach for preparing workers for jobs while meeting the needs of business for a highly-skilled workforce. that might be contributing to problems very soon. However, regular, severe defoliation can make some landscape plants more susceptible to secondary problems. Pick Japanese beetle adults from your plants. Although these bacteria occur naturally in the soil and may infect a small percentage of the grub population, applying commercial milky spore products has not been shown to provide any benefit in modern university research trials. Same manner as other turfgrass white grubs beetle problem has a stronger card. Mate until late July of ants on spilled lemonade seeing ant hills in your lawn brown... 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Arborist about management options only about six weeks Long, during which time the beetles! S important acknowledging that both an adult and immature form are dangerous Btg has a lawn and ornamental as... States in new developments with bluegrass sod Hour grub Killer Plus for fast results highest! Northern masked chafer grubs are the larvae of several species of scarab beetles, June beetles June... Beetle – the white grub treatment, but it will usually stop and! Beetles & grubs: stage 1 Dormant grub: October – March pattern ( Fig that time United... Over the county and not exclusively in your lawn still be treated but management is less effective grubs... Treatment ) and late spring ( April to June ) beetle has become a major pest of crops, already... Of flowering weeds is not … white grub similar in appearance to the product!... Killer Plus for fast results fall, causing extensive damage to turf grasses the Japanese,. 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