Foliar application timing for thrips is most effective when cotton is between the expanded cotyledon to first true leaf stage (see photo). Thrips are part of the order Thysanoptera, and are common garden pests that suck plant juices and sometimes spread viruses. 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. Aeris, Baythroid XL, corn, cotton, pest management, pests, soybeans, thrips, Trilex, Velum Total, Protect Your Almonds Against Nematodes with Velum One, Protect Your Potatoes Against Nematodes with Velum Prime, a vector for transmission of soybean vein necrosis virus, management recommendations for the thrips that dominate in their fields, create penetration into corn kernels that allows, harmed by thrips from emergence to the third or fourth leaf stage. In some situations (high thrips infestations and/or slow seedling growth) supplemental foliar insecticides may be needed in addition to at-plant insecticides. Tobacco thrips are the species encountered more than 90% of the time in Mississippi. The most obvious signs of thrips to scout for are foliage yellowing and seedling stunting. Moist soil does not equal saturated soil. For areas with a history of early-season insect infestations, growers can use Aeris® insecticide/nematicide seed treatment, which offers broad-spectrum protection against thrips as well as cutworms and reniform and root knot nematodes. The feces of thrips is also often present in the form of minuscule black specks in close proximity to the bugs themselves. Treatment is rarely needed once cotton has reached the five-leaf stage, even if the cotton has been badly injured by thrips. NC State Extension Research Specialist Dr. Dominic Reisig addresses thrips control in cotton as a part of the CHROME Regional Ag Expo. Always read and follow label instructions. Thrips lay their eggs in slits they cut in live plant stems. Because thrips are so tiny, they’re difficult to see. So, it was a surprise to University of Georgia Extension Entomologist Phillip Roberts when he found out some farmers looking for ways to cut input costs were not protecting the crop from thrips. Thrips often overwinter on wheat and maturing weeds. adjacent cotton fields. against beet armyworm, cotton bollworm, fall army-worm, and saltmarsh caterpillar. Lambda-cyhalothrin belongs to the synthetic pyrethroid class, and it’s instrumental in the control of a broad spectrum of pests including thrips, aphids, beetles, and flies. How to control scale & thrips: 1) Predators. This will not provide control of the thrips, but it will let you know if a plant is becoming infested. However, we can’t control thrips unless we use a combination of seed treatments, foliar … Control data provided by Dr. David Kerns (formerly Texas A&M AgriLife Extension Service . Many species of thrips (in the insect order Thysanoptera) infest corn, soybean and cotton crops. In about five days under warm weather conditions, eggs hatch as larvae and feed on the leaf surface by gnawing cells and sucking sap. Mechanical Control: Cotton is harvested in 3-4 pickings by hand as the boll mature. One or two releases are usually enough to provide thrips control in approximately 3-5 weeks, depending on the level of thrips and the type of host crop. ©Debra L Ferguson Stock Images Since we aren’t able to have face-to-face cotton scout schools, I have asked Dr. Ron Smith and Dr. Scott Graham to do some YouTube videos with me on cotton scouting and insect control. comparison of products used to control thrips on cotton, 1999: cotton was planted on 25 May at the Eastern Shore Agricultural Research and Extension Center near Painter, VA. Each Scout early after crop emergence and throughout the growing season. Immature thrips are lighter in color, while adults will have two pairs of wings. Look for thrips and feeding symptoms on upper and under leaves, especially between leaf veins. UT recommends the following insecticides: Acephate or Orthene (90 or 97%) at 0.20 – 0.25 lbs product per acre. Adults range in color from black to yellow. Usually, soybean seedlings will outgrow thrips injury, and an insecticide treatment is not needed. 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. Follow IPM guidelines for cotton and always rotate insecticides with different modes of action to effectively manage insecticide resistance in combination with other control practices. Thrips damage on cotton leaves — photo courtesy NCSU Cotton Scouting Guide Thrips are the most consistent pest in cotton each year. When corn plants are stressed for water during long stretches of hot, dry weather, the most damage from corn thrips can occur. For greenhouse vegetable crops, Orius is most successfully used on peppers and cucumber. Development of computer model to project Thrips pressure. If so, an insecticide application for soybean thrips may be advisable. As many as 29, 28, and 49 plant families have been documented as feeding host, reproductive hosts, or plants that thrips are transients on for tobacco thrips, western flower thrips, and flower thrips, respectively. Working hand-in-hand with our partners at N.C. A&T and 101 local governments, we conduct groundbreaking research that addresses real-world issues in communities across the state. Cotton Thrips Control Numerous Factors affect Thrip pressure and management. 1). Gennadius) and thrips, (Thrips tabaci Lindeman) are deleterious to the process of cotton growth and development with their ability to build up to serious proportions as a result of rapid and prolific breeding in cotton plant. At-plant insecticides for thrips control provide a consistent yield response. North Carolina citizens each year through local centers in the state's 100 counties Adults mate, and females inject eggs into young corn seedling tissue. field personnel involved with insect control and crop consulting. Feeding thrips strike cotton leaves and terminal buds. Entomologist, Lubbock; currently Louisiana State University Ag Center Associate Professor and Members of the Thysanoptera order, the term 'thrips' includes more than 6,000 species. Older damage can be misleading. Grass thrips are the most common thrips species infesting corn. Although rare, seedlings may die under high soybean thrips populations, which can cause leaf crinkling. Identification of thrips within the genus Frankliniella on seedling cotton is important because control measures may vary with different species. There are a few other pests that can do damage that will look similar to that of thrips, including mites and lacewings. Tobacco thrips are the most common thrips species that infest North Carolina cotton. and with the Eastern Band of Cherokee Indians. Currently, these pests are resistant to several insecticides, resulting in fewer options for economically viable management. It only takes a few days for the pests to significantly injure plants before the true leaves appear. The critical time for monitoring thrips is from crop emergence through seedling stages. In the winter months, they prefer to be on the ground or under plant debris. Refer to university Extension weekly and monthly reports for scouting guidelines and economic thresholds for insecticide treatments in specific corn varieties. The threshold for thrips is 2-3 thrips per plant with immatures present. Cotton from damaged boll should not be kept with good quality cotton. If cotton is treated with a systemic insecticide at planting, it should be scouted for thrips … Unless 75 percent of trifoliate leaves are damaged, treatment is not likely to be economically practical and could possibly lead to spider mite infestations. Chemical Control of Cotton Thrips. Also keep in mind that optimum cotton insecticidal seed treatment or at-plant insecticide uptake matches optimum cotton seedling growth- moist soils and warm temperatures. So where are thrips now? Farmers should check regional guides and management recommendations for the thrips that dominate in their fields. An Insecticide to Control Thrips. Control is rarely necessary later in the season. In recent years, the disease has been documented in at least 16 states, so it’s important to monitor for high thrips populations that can spread SVNV. Because thrips often hide in tight spots, closely scout by uncurling all the leaves in the terminal growth. North Carolina planted about 450,000 acres in 2013, which places the state third in cotton acreage behind Texas and Georgia. NC State Extension is the largest outreach program at NC State University. It appears you don't have javascript enabled. either alone or in combination with a nematicide. The western flower thrips (WFT), Frankiliniella occidentalis is a recent exotic invader also found in cotton regions. Adult corn thrips appear black in color, while immature thrips are lighter in color and smaller in size. Beneficial Nematodes are the easiest way to control thrips developing in the soil. Types of Cotton Sucking Pests - Its Management & Control Cotton Aphids. infection and disease, resulting in ear rot. Severe thrips injury on untreated cotton. The wide range of alternate hosts, especially continuous production of For information on a portfolio of products from Bayer that help corn growers maximize yields and protect their crops, contact your local Bayer representative. Typically, thrips vary in color from black, yellowish-brown, tan and sometimes orange. Cotton acreage reached its height in 1926, when North Carolina producers planted right at 2 million acres. Release lacewings in your garden as a method of control. Generally cotton planting would be under way, with thrips management decisions soon follow. Cotton aphids scientifically known as Aphis gossypii is a cosmopolitan species broadly distributed in all the cotton growing states of India. The threshold for thrips is 2-3 thrips per cotton plant with immatures present. The soybean seedling stage (VE to V6) presents the most risk from economic damage caused by thrips. Utilize the CottonTIP model to stay up-to-date on the risk of thrips injury for cotton planted in your area. Spray NSKE @ 5 % OR acetamiprid 20 SP @ 0.2g/l OR fipronil 5 SC @ 1 ml/l Stem smearing with imidacloprid 17.8 SL @ 1ml:20 ml water and brush the liquid on the growing tip of the plant If you’ve used a seed treatment or the Admire Pro at-plant + seed treatment combination, keep in mind that residual begins to decline as soon as seed is planted. All thrips inhabit secluded areas on plants, such as unopened flower and terminal buds, which reduces exposure to insecticide applications. The same thing that connects it to every corner of North Carolina: NC State Extension. Other strategies for controlling thrips in cotton include practices deployed as cultural techniques. The best foliar insecticide application timing for thrips control is the 1-2 leaf cotton stage for maximum economic returns; however, this does not line up very well with residual herbicide applications (REMEMBER THERE ARE NO INSECTICIDES CURRENTLY LABELED TO BE APPLIED WITH DICAMBA FORMULATIONS) so insecticide applications are often considered an “extra trip”. Baythroid XL is a Restricted Use Pesticide. On average, 40% of thrips thrive on leaf litter or dead branches. Using the Thrips Infestation Predictor for Cotton. (Optional) This obviously isn’t a viable solution for your houseplants! Thrip management is a matter of garden maintenance — reducing the places where thrips may breed — and requires removing plant debris while it’s still on the ground and green. On the other hand, in the summer and spring, they are usually in trees, flowers, and fruits. All cotton should be scouted on a regular basis for thrips and other insect pests, but we should expect higher thrips populations on cotton planted prior to May 10 in a conventionally tilled system compared with cotton planted after May 10 and/or in a reduced tillage system. The habitats of these pests will largely depend on the weather. Therefore, you want to form a plan of thrip control because controlling thrips is much better for your plants that getting rid of thrips altogether. If you’re using a seed treatment alone, you’ll likely need an additional foliar application. Cotton aphid, Aphis gossypii. Identification and lifecycle characteristics of thrips vary somewhat by the host crop or plant they attack. Stunted plants can result from thrips feeding, which destroys plant cells and causes crinkled leaves that curl upward. One of the universal components found in each states management of pests in cotton, is to scout which bugs are present. The disease is a relatively new soybean threat; it was first detected in 2008 in Tennessee. ... Thrips (Thrips tabaci) of Cotton. Chemical Control and Action Thresholds. Commonly used neonics include thiamethoxam (Cruiser, Avicta, etc.) Cotton plants are most likely to be harmed by thrips from emergence to the third or fourth leaf stage. Thrips can be found in corn throughout the growing season. lice, feed on cotton plants as secondary pests: the cotton aphid, the cowpea aphid, and the green peach aphid (Fig. Depending on the location, thrips may be behind 2-3 weeks from “normal” in 2014. Thrips Host Range. To improve the efficiency of your monitoring program, combine sampling of thrips with other pests. Across most of the Cotton Belt, thrips are considered the number one pest of seedling cotton. thrips eggs laid on the plant, eggs hatched, and immature thrips are surviving). Cooperative Extension prohibits discrimination and harassment on the basis of race, color, national origin, age, sex (including pregnancy), disability, religion, sexual orientation, gender identity, and veteran status. Control. Read our Commitment to Diversity | Read our Privacy Statement. Despite their small size, these insects have the potential to cause yield reductions of more than 100 pounds of lint per acre; extremely heavy infestations can even cause death of seedling plants. The number of pickings varies with the maturity habit of the variety. The Thrips Infestation Predictor for Cotton can be found at https://climate.ncsu.edu/cottonTIP . Because most tobacco thrips populations are resistant to the neonicotinoid-group insecticide seed treatments, there has been a lot of renewed interest in different at-planting insecticides. Although there are many species of thrips, the western flower and onion thrips are the most common species in North America. What made it so helpful? 2 Many small predators such as predaceous thrips, minute pirate bugs, and spiders feed on thrips. They leap or fly away when disturbed. 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. Avoid treating for revenge. Thus, seed or foliar-applied chemical insecticides are typically required to protect cotton from these pest groups. During the 2016 growing season, thrips arrived early and stayed longer than expected. Plant Date: In general, earlier plantings equal higher Thrips pressure and damage. Damage: With their rasping-sucking mouthparts, thrips dam-age cotton by extracting plant juices from devel- Not all products are registered for use in every state. After the third or fourth leaf stage, cotton plants should be in a vigorous growth mode and relatively secure from thrips yield damage. Not all products are registered for use in every state. Although corn thrips are considered an occasional pest, large populations of corn thrips can cause leaves to turn yellow and stunt seedling growth. Baythroid® XL, a pyrethroid, performs on a broad spectrum of insect pests, with fast knockdown and long residual control. 29, 30, and 31). 1 Both species have fairly wide host ranges, feeding on both broadleaf and grass plants, including alfalfa, common bean, grains, grasses, and various weed species. The threat of soybean thrips damage increases during hot, dry weather. Seed treatment with imidacloprid 60FS @ 10 ml/kg OR thiomethaxam 70 WS @ 5 g/kg seeds. Base the decision to apply an insecticide on the number of thrips present and the stage of plant development. This is a useful tool for predicting whether a foliar insecticide application is needed for thrips control in cotton. Western Flower Thrips Control in Cotton . For information on a portfolio of products from Bayer that help cotton growers maximize yields and protect their crops, contact your local Bayer representative. In Texas, three species of aphids feed on cotton plants as secondary pests: the cotton aphid, the cowpea aphid, and the green peach aphid (Figs. Vigilance — spotting problems early … It is recommended that specially made blue traps be used, rather than standard yellow traps; the blue traps seem to be more effective and it is easier to see the light-colored nymphs on blue than on yellow. Thrips are staking claim as the No. I would suggest this video be saved and shown at the 2021 Cotton Focus to remind growers to take thrips control seriously. If you’re using Admire Pro + seed treatment, you may or may not need the additional foliar spray. Not all products are registered for use in every state. Thrips are tiny, slender, agile insects. Adult soybean thrips differ from immature thrips because they fold two pairs of wings behind their backs unless in flight. Eggs hatch in about six days after the female thrips’ sharp laying tube inserts them into cotton plants. Subscribe By Email chevron_right. This is followed by two larval stages, which take six days. If one product does not seem to be working, try a different insecticide. This Expo is a … And the plant bug isn't that far behind. Many insects control different life stages of thrips and there are numerous mycoinsecticides that also target them. Management Chemical Control. 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