Brown grubs with black spots damage the foliage by feeding on the upper surfaces of the leaves, causing the lower surfaces to turn brown. Flea beetle (steely beetle) This insect attacks buds of both wild and cultivated grape, and is another early season grape pest. Native to North America. Grape Flea beetles, Altica spp. (Coleoptera: Chrysomelidae), are small (4-5 mm), oval shaped, metallic blue-purple beetles that jump when disturbed. Pesticide recommendations in this publication are registered for use in Kentucky, USA ONLY! The grape flea beetle is occasionally a serious pest of grapes in Ohio. Larvae are small, cream-colored worms (1/8 – 1/3 inch long). •The Chrysomelid beetle family has over 1,400 North American species. Scouting is especially critical to catch this sporadic pest in years with damaging populations. The grape flea beetle is often a sporadic pest of grapes during the early growing season in most growing areas. Mechanical control methods include handpicking larger pests, such as Japanese beetles and caterpillars, and removing any grapes or clusters that are injured by Asian lady beetles. Please check with your local county agent or regulatory official before using any pesticide mentioned in this publication. The larvae feed on leaves for 3 to 4 weeks, then drop to the ground where they pupate in the soil, and emerge as adults in 1 to 2 weeks later. Grape flea beetle is found in the eastern two-thirds of the United States. Once the buds are 1/2 inch long, only slight injury is caused. The females lay eggs under loose cane bark on vines, or occasionally on leaf upper surfaces, or on buds. Grape Flea Beetle. The most serious damage occurs in the spring. Grape flea beetle, Altica chalybea Illiger This is a metallic blue-green beetle that is almost 5 mm long. Grape flea beetle, larvae, and damage. Adults eat buds and unfolding leaves, resulting in hollowed out and leaves that emerge ragged and tattered. Grape Flea Beetle (Altica chalybea) | Mary Keim. Scars are typically formed beyond the last grape cluster. Photos by Eric Burkness, University of Minnesota. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture. Grape flea beetles overwinter as adults and become active on warm April days when grape buds begin to swell. The adults overwinter and emerge in late March when buds are start-ing to swell. Dr. Subba Reddy PalliDepartment Chair & State EntomologistS-225 Agricultural Science Center NorthLexington, KY 40546-0091859.257.7450entchair@uky.edu, UK Entomology: Vision, Mission, & Core Values, Nancy Cox, Ph.D. In the spring, adults feed directly on buds, hollowing them out during the daylight hours from bud swell to 1/2-inch shoot growth. While the larvae do injure the leaves, they are rarely of economic importance. When flea beetles are common and injury to the small buds is observed, a spray timed at bud swell will provide control. ), also known as the steely beetle, is a native insect and occurs in almost all states east of the Rocky Mountains and in Canada. Larvae are yellow-brown with a dark head and feed on clusters and leaf surfaces. Hosts include primarily wild and cultivated grapes and Virginia creeper. Native to North America. Digital Media Library, Photos courtesy Ric Bessin, University of Kentucky Entomology, College of Agriculture, Food and Environment. Flea beetle (Steely beetle) This insect attacks buds of both wild and cultivated grape, and is another early season grape pest. Upon emergence adult beetles begin to feed upon newly swollen grape buds, chewing holes in the ends and sides. Adults are small (1/10 inch long), shiny, dark brown or black beetles with large hind legs that allow them to jump when disturbed. Adults eat buds and unfolding leaves, resulting in hollowed out and leaves that emerge ragged and tattered. Try this homemade spray to control flea beetles: 2 cups rubbing alcohol, 5 cups water, and 1 tablespoon liquid soap. Grape Black Rot Sprays 4. Adult beetles are most numerous following mild winters. Coverage is Key for Airblast Sprayers 6. Potato leafhopper. … Bonide® Thuricide® Bacillus Thuringiensis (BT) for grape leaf roller and omnivorous leaf roller. Generally, larvae are not the greatest concern because management should be concentrated on the bud-damaging adult stage. They become active early in the spring and lay eggs in cracks in the bark, at bases of buds, between bud scales, and on leaves. The insect overwinters as an adult. CAUTION! Description. Departments & Units   /   Adults are dark metallic greenish-blue, jumping beetles about 1/5 inch long; larvae are brownish and marked with black spots; eggs are pale yellow, and fairly conspicuous on upper leaf surface or under loose cane bark. These are often the first insect pests to begin attacking grapes. Adults overwinter in protected areas around vineyards, and start feeding on interior of primary buds and opening grape leaves in early spring. When grape flea beetle is a problem, it occurs early in the season, just when the buds begin to swell. If damage has occurred in the past, check those areas of the vineyard first. Once the buds reach 1/2-inch in size, beetles cannot cause significant damage. The Grape Flea Beetle The grape flea beetle is small (3/16 inch long) metallic greenish-blue as an adult. The grape flea beetle attacks the buds of wild and cultivated grapevines and the Virginia creeper. How to Get Rid of Flea Beetles. Bonide® Fruit Tree Spray for flea beetles, Japanese beetles, grape leaf skeletonizers, grape berry moth, spider mites, mealybugs, leafhoppers, black rot, downy mildew and botrytis rot. The grape flea beetle (or steely beetle) is a shiny, metallic dark blue. Vineyard edges near woods where alternate hosts for the beetle may be growing (wild grape and Virginia creeper) are prime areas for grape flea beetles. (Coleoptera: Chrysomelidae), is a native pest that attacks buds of wild and cultivated grapevines as well as our native Virginia creeper (Parthenocissus quinquefolia). Grape Flea Beetle 2. This may reduce the numbers of primary and secondary fruit clusters. There is only one generation per year; however, if overwintering sites (woodlands) for this insect are common nearby, then large infestations can occur. Scheduled sprays for grape berry moth and other insect pests occur later in the season are of little benefit as they do not coincide with early flea beetle activity. Spring is finally here and grape buds are starting to swell. Control of flea beetles naturally starts with consistent cultural practices, physical barriers, and even biological methods. Periodical Cicadas 5. Note:Flea beetles transmit viral and bacterial diseases. Damage is often restricted to vineyard borders, particularly near wooded areas. The flea beetle is a small, jumping beetle of the leaf beetle family (Chrysomelidae), that makes up the tribe Alticini which is part of the subfamily Galerucinae.Historically the flea beetles were classified as their own subfamily. Native to North America. They are approximately 1/10 inch long, shiny blue-purple to blue-green with enlarged hind legs for jumping. The Grape flea beetle, Altica spp. Check 100 vines and record the number of hits. Damage symptoms look similar, as both burrow into and hollow out developing buds around bud swell until bud break. The adult insects move to the vines at bud swell and usually are localized within the vineyard. Beth reported that she did not see any insect during her scouting at WMARS on May 14, 2020 and that only two grape buds exhibited damage indicative of flea beetle or cutworm feeding. Significant damage typically occurs only in years where the weather conditions keep bud development in the susceptible stages. When grape flea beetle is a problem, it occurs early in the season, just when the buds begin to swell. This work is supported by New Technologies for Agriculture Extension grant no. The 4 percent damage threshold has been used in balanced pruned ‘Concord’ vines and adjusted for higher or lower bud number according to variety and training system. Symptoms       Management       Life cycle         More Info. grape cane girldler. Grape flea beetle or steely beetle. Grape Cane Borer (.pdf) – Cornell University; Shothole Borer – UC-Davis; Beetles and Weevils: General. Flea beetle control is an ongoing battle that relies upon three levels of approach. The grape flea beetle is often a sporadic pest of grapes during the early growing season in most growing areas. Inspect buds early in the season during bud swell. Infested canes must be cut off and burned. Grape flea beetle is found in the eastern two-thirds of the United States. •Several are a very common pests locally Cottonwood leaf beetle Colorado potato beetle Repeated scouting may be required in years where weather conditions keep buds in the susceptible stages (bud swell to 1/2-inch shoot growth. Beetles overwinter in the adult stage and emerge as grape buds begin to swell, with one generation per year. Sites near overwintering habitats such as woods or abandoned vineyards are especially at risk. The light yellow fairly conspicuous eggs hatch in a few days. It is this injury to the developing buds that can cause economic losses in some years. 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