Grubs feed on the roots of turfgrasses and vegetable seedlings, doing best in good quality turf in home lawns, golf courses, parks, … Their favorite plants are roses, fruit plants/trees and these tree species. Learn which plants thrive in your Hardiness Zone with our new interactive map! There are several species of white grubs in the Midwest. The palm weevil Rhynchophorus ferrugineus is one of two species of snout beetle known as the red palm weevil, Asian palm weevil or sago palm weevil.The adult beetles are relatively large, ranging between two and four centimeters long, and are usually a rusty red colour—but many colour variants exist and have often been classified as different species (e.g., Rhynchophorus vulneratus). In late June or early July, according to Cornell University, beetles begin to leave the ground and feed on other bugs and plants. The palm weevil Rhynchophorus ferrugineus is one of two species of snout beetle known as the red palm weevil, Asian palm weevil or sago palm weevil.The adult beetles are relatively large, ranging between two and four centimeters long, and are usually a rusty red colour—but many colour variants exist and have often been classified as different species (e.g., Rhynchophorus vulneratus). Adults feed on the foliage and fruits of several hundred species of fruit trees, ornamental trees, shrubs, vines, and … Once the egg hatches, the grubs will go through three larval stages or instars during their development. Both Asiatic and Japanese Beetles have a single generation each year, with adults feeding through the summer and grubs overwintering in the soil, then becoming active as the soil warms up and they begin to eat root material. It takes about a month in summer to develop from egg to adults so there are many generations per year. Once larvae have overwintered, they move again to the surface for a brief feeding period before becoming a fully developed adult in September. Name: Sun beetle Controlling Japanese Beetles in the landscape Feedback, questions or accessibility issues: Getting garden seeds during a pandemic 2021, January 2021: Saying Bye-Bye to Boxwood Blight: Proper Disposable of Holiday Wreaths, © 2021 The Board of Regents of the University of Wisconsin System. Once the egg hatches, the grubs will go through three larval stages or instars during their development. The Life Cycle of Scarabs Like all beetles, scarabs undergo complete metamorphosis with four stages of development: egg, larva, pupa, and adult. This life cycle takes a year. Adults emerge the following spring. After hatching from eggs, white grubs feed on plant roots. Grubs can kill small plants, but tend to have less of an effect on larger plants with larger, more robust root systems. In late June or early July, according to Cornell University, beetles begin to leave the ground and feed on other bugs and plants. The grubs grow quickly and by late August are almost full-sized (about 1 inch long). Grubs begin to feed again, this time more aggressively. It is not long before the eggs hatch, the larvae are also white and look somewhat like maggots. The grubs, 1/4 to over 1 inch (6-25 mm) long, are white with brown heads and have six prominent legs. After mating, female beetles dig 2 to 5 inches into the soil to lay eggs. Twenty-nine species of May/June beetles have been documented in the state, although there are over 200 species known throughout North America. The exceptions are the black turfgrass ataenius which has a two year life cycle and the May or June beetles take three years to complete their life cycle Species of Lawn Grubs Include: In locations where damage from a large population has occurred, control may not be warranted every year due to the multi-year life cycle of May/June beetles. Blain’s Farm & Fleet is here to help you get rid of Japanese beetles and grubs. Damage from adults and white grubs can occur anywhere in Wisconsin, but is most commonly found in the eastern and northeastern parts of the state. Egg laying begins soon after the adults emerge from the ground and mate. On warm days of late winter and spring, the thumb-sized grubs burrow to the surface where they feed on grass roots and thatch. Adults begin to emerge in May and June. These eggs eventually hatch into grubs and the cycle begins again. White grubs damage plants by feeding on their roots and disrupting the uptake and transport of water and nutrients. 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