NC State Extension Research Specialist Dr. Dominic Reisig addresses thrips control in cotton as a part of the CHROME Regional Ag Expo. Adults range in color from black to yellow. and with the Eastern Band of Cherokee Indians. We posted an article on how to use the CottonTIP on the ACES website and made a short video with Mr. Eddie McGriff on thrips management. ... Thrips (Thrips tabaci) of Cotton. Biology and Control of Thrips on Seedling Cotton Thrips are the smallest of all cotton insect pests with an overall body length of less than one-twelfth of an inch. The best approach to managing thrips and other cotton insects is preventative control. Start checking weekly for thrips from about the time cotton emergence reaches a 50 percent stand until squaring begins and plants have five to seven leaves. Thrips may be found in cotton plants throughout the growing season, but early-season seedlings are most susceptible during cool, wet weather. After the third or fourth leaf stage, cotton plants should be in a vigorous growth mode and relatively secure from thrips yield damage. Predatory thrips , green lacewings, minute pirate bugs, mites, and certain parasitic wasps help to control plant-feeding thrips. DAMAGE TO ONIONS. In 2011, we began observing reduced tobacco thrips control with the active ingredient thiamethoxam. Although rare, seedlings may die under high soybean thrips populations, which can cause leaf crinkling. Resistance Both adults and the wingless larvae are attracted to white, yellow and other light colored blossoms and are responsible for spreading tomato spotted wilt virus and impatiens necrotic spot virus. Thrips damaged cotton. There are a few other pests that can do damage that will look similar to that of thrips, including mites and lacewings. 1 pest of seedling cotton. Host plants include onions, beans, carrots, squash and many other garden vegetables, and many flowers, especially gladioli and roses. Thrips are part of the order Thysanoptera, and are common garden pests that suck plant juices and sometimes spread viruses. Be sure to scout thrips to see if treatment is needed. Evaluate if 75 percent of leaves sampled are damaged. At-plant insecticides for thrips control provide a consistent yield response. Cotton from damaged boll should not be kept with good quality cotton. But they really seem to love cannabis! Adult thrips are usually brownish or almost black in appearance and have wings (depends on species, tobacco thrips is the most common thrips species infesting cotton and adults will be dark brown or black). Members of the Thysanoptera order, the term 'thrips' includes more than 6,000 species. UT recommends the following insecticides: Acephate or Orthene (90 or 97%) at 0.20 – 0.25 lbs product per acre. Unless 75 percent of trifoliate leaves are damaged, treatment is not likely to be economically practical and could possibly lead to spider mite infestations. It will be important to keep an eye on thrips populations as seedlings emerge, and the weeks that follow to decide if an insecticide application is warranted. Chemical efficacy varies by species of thrips being treated. Adult corn thrips appear black in color, while immature thrips are lighter in color and smaller in size. Learn More About NC State Extension, We have several topic based e-mail newsletters that are sent out periodically when we have new information to share. What separates NC State University from other schools? The western flower thrips (WFT), Frankiliniella occidentalis is a recent exotic invader also found in cotton regions. Avoid treating for revenge. Many small predators such as predaceous thrips, minute pirate bugs, and spiders feed on thrips. Once seedlings reach the 4-leaf stage and are growing rapidly thrips are rarely an economic concern. Also remember that tank mixes to control both weeds and thrips can reduce application costs. They also superficially resemble some other thrips species that, if mistaken, may result in poor control because the insecticides selected may not be efficient against chilli thrips. Scout early after crop emergence and throughout the growing season. Both of these 2 predators eat the eggs & larvae which is … The threshold for thrips is 2-3 thrips per cotton plant with immatures present. Commonly used neonics include thiamethoxam (Cruiser, Avicta, etc.) or imidacloprid (Gaucho, Aeris, etc.) This obviously isn’t a viable solution for your houseplants! What made it so helpful? Feeding thrips strike cotton leaves and terminal buds. They can thrive in different places depending on what time of the year it is. The boll weevil arrived in the state that year and acreage dropped until the weevil was eradicated in the late 70s and early 80s. Why would a tropically adapted perennial plant put a lot of energy into growing quick when you plant it in North Carolina? Cotton growers can use an in-furrow, at-plant insecticide/nematicide such as Velum® Total, which delivers wide-spectrum, long-lasting control of nematodes and early-season cotton insects, including thrips, aphids and fleahoppers. Biological control. I would suggest this video be saved and shown at the 2021 Cotton Focus to remind growers to take thrips control seriously. The best defense against thrips is a rapidly growing cotton plant. and thrips (Thrips spp.) Also remember that tank mixes to control both weeds and thrips can reduce application costs. NC State University and N.C. A&T State University work in tandem, along with federal, state and local governments, to form a strategic partnership called N.C. Identification of thrips within the genus Frankliniella on seedling cotton is important because control measures may vary with different species. Outside of cannabis, thrips’ favourite crop seems to be cotton, although they can damage many kinds of crops. Under low to moderate pressure, seed treatments labeled for thrips will go a long way to protect young seedlings from chewing (rasping) damage to soybeans. Adult soybean thrips differ from immature thrips because they fold two pairs of wings behind their backs unless in flight. They are tiny insects with thin bodies. Female thrips are each capable of laying 250 eggs during a two- to three-week period. 2 thoughts on “ Thrips Control in Cotton ” Richard Jameson says: June 13, 2020 at 8:48 am I just watched Scott Stewart’s YouTube video on thrips control. In this case, separate trips over the field should be made. The threshold for thrips is 2-3 thrips per plant with immatures present. In-furrow insecticide treatment is recommended in fields with known high infestations of cotton thrips. When thrips target host plants, they feed by gnawing (rasping) on leaves and plant tissues to release sap that they consume. Based on degree-day modeling, current thrips population development is way behind the 5 year historical average. Release lacewings in your garden as a method of control. Thrips are considered the No. The value of the raw cotton and cottonseed produced in the state is worth about half a billion dollars. Mechanical Control: Cotton is harvested in 3-4 pickings by hand as the boll mature. The site may not look or function as expected. Always read and follow label instructions. Cotton Thrips Control Numerous Factors affect Thrip pressure and management. This will not provide control of the thrips, but it will let you know if a plant is becoming infested. Control. Reports of thrips damage on cotton with an insecticidal seed treatment and/or in-furrow neonicotinoid (Admire Pro) have increased over the past week. Begin scouting for thrips early in the seedling stage, during the VE to V6 growth stages. Development of computer model to project Thrips pressure. Extension Weed Specialist & Assistant Professor, Professor of Crop Science & Extension Cotton Specialist, N.C. While foliar applications after heavy thrips damage will not usually increase cotton yields, early application once thrips are detected can help avoid a negative impact on yield. After removing the adhesive backing paper, use a plastic tie to knot and secure each sticky sheet near any vents, doors, or other openings that a thrips bug could pass through. The distinguishing feature setting them apart from other insect pests is that thrips thrive on dozens of plant types; most crops, including vegetables, flowers, forages, field and orchard crops, are attacked by at least one species of thrips. Many insects control different life stages of thrips and there are numerous mycoinsecticides that also target them. Thrips in soybeans are not often noticed, yet they are among the most numerous soybean insect pests. Although corn thrips are considered an occasional pest, large populations of corn thrips can cause leaves to turn yellow and stunt seedling growth. It is especially important that our late planted cotton gets off to a good start to make up for a little lost time. When populations are severe, terminal buds may be destroyed and excessive branching may slow cotton growth. It’s been a challenge getting our crops in the ground, and our planting dates are really stretched out. The early, slow growth of the terminal bud makes cotton more susceptible to thrips yield damage than corn or soybeans. Baythroid® XL insecticide, a pyrethroid, performs on a broad spectrum of insect pests, with fast knockdown and long residual control. Thrips infestations in cotton vary by location, planting date, and year. Thrips often overwinter on wheat and maturing weeds. Cotton plants are most likely to be harmed by thrips from emergence to the third or fourth leaf stage. 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