UT recommends the following insecticides: Acephate or Orthene (90 or 97%) at 0.20 – 0.25 lbs product per acre. The same thing that connects it to every corner of North Carolina: NC State Extension. We know that mid-April to approximately May 10 planted cotton is historically the most at risk for thrips damage, primarily due to typically slower seedling grow-off conditions. 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. The lifecycle involves about 16 days from egg to mature adult. Predatory thrips , green lacewings, minute pirate bugs, mites, and certain parasitic wasps help to control plant-feeding thrips. Their uneven mouthparts are cone-shaped, and wings are narrow and fringed with hairs. Farmers should check regional guides and management recommendations for the thrips that dominate in their fields. Cultural Control. Thrips are the smallest of all cotton insect pests with an overall body length of less than one-twelfth of an inch. 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. The wide range of alternate hosts, especially continuous production of Outside of cannabis, thrips’ favourite crop seems to be cotton, although they can damage many kinds of crops. Thrips often overwinter on wheat and maturing weeds. (Optional) 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). They can become serious pests indoors, outdoors and in greenhouse settings. There are a few other pests that can do damage that will look similar to that of thrips, including mites and lacewings. 1. Evaluate if 75 percent of leaves sampled are damaged. Read our Commitment to Diversity | Read our Privacy Statement. The habitats of these pests will largely depend on the weather. Adults mate, and females inject eggs into young corn seedling tissue. Baythroid® XL insecticide, a pyrethroid, performs on a broad spectrum of insect pests, with fast knockdown and long residual control. Typically, thrips themselves do little damage, but they create penetration into corn kernels that allows Fusarium spp. Severe thrips injury on untreated cotton. Species, seasonal abundance, damage, control, and predaceous natural enemies of thrips (Thysanoptera: Thripidae) on cotton, Gossypium hirsutum L., were determined at two sites from 2005 to 2007 in the Lower Rio Grande Valley of Texas. How to control scale & thrips: 1) Predators. Identification and lifecycle characteristics of thrips vary somewhat by the host crop or plant they attack. Members of the Thysanoptera order, the term 'thrips' includes more than 6,000 species. and thrips (Thrips spp.) Starting off with a good seed treatment is an excellent way to … Poor plant vigor and stunting may result. Background: Plant bugs (Lygus spp.) Once seedlings reach the 4-leaf stage and are growing rapidly thrips are rarely an economic concern. Cooperative Extension has offices in every county, NCDA&CS Agronomic Services – Soil Testing, NCDA&CS Agronomic Services – Plant Tissue Analysis, North Carolina Cotton Insect Scouting Guide, 2014 Cotton Belt Regional Insecticide Efficacy Summary, 2018 Cotton Belt Regional Survey Insecticide Efficacy- Cotton, Corn, Soy, North Carolina Cotton Producers Association, Southern Southeastern Cotton Growers and Ginners, Cotton Cultivated: Cotton Ag Data, Resources & Trends, Guidelines for Use of a Wick Applicator for Applying Mepiquat Chloride, Calibration of a Wick Delivery System for Mepiquat Chloride, Mountain Horticultural Crops Research & Extension Center, Vernon G. James Research & Extension Center, Entomology – Insect Biology and Management, Mountain Horticultural Crops Research and Extension Center, Weed Management in Nurseries, Landscapes & Christmas Trees. They can thrive in different places depending on what time of the year it is. What made it so helpful? Unfortunately, they are particularly damaging when they appear early on in the grow process. Cotton aphids scientifically known as Aphis gossypii is a cosmopolitan species broadly distributed in all the cotton growing states of India. Some situations may require supplemental insecticide treatment for boll-worm and fall armyworm. The early, slow growth of the terminal bud makes cotton more susceptible to thrips yield damage than corn or soybeans. Also remember that tank mixes to control both weeds and thrips can reduce application costs. In general, they are not host specific; however; species such as onion thrips and tobacco thrips feed on plants in specific families. Unless 75 percent of trifoliate leaves are damaged, treatment is not likely to be economically practical and could possibly lead to spider mite infestations. Grass thrips are the most common thrips species infesting corn. The number of pickings varies with the maturity habit of the variety. Refer to university Extension weekly and monthly reports for scouting guidelines and economic thresholds for insecticide treatments in specific soybean geographies. Using the Thrips Infestation Predictor for Cotton. Refer to university Extension weekly and monthly reports for scouting guidelines and economic thresholds for insecticide treatments in specific corn varieties. The most obvious signs of thrips to scout for are foliage yellowing and seedling stunting. Cotton plants are most likely to be harmed by thrips from emergence to the third or fourth leaf stage. Concentrate your attention to live yellow immature thrips in terminals. This Expo is a … They are tiny insects with thin bodies. Keep in mind that these unfavorable growing conditions, when paired with high densities of cotton thrips can wreak havoc on a seedling. spotting and wilting of the fruit and leaves, reducing market value of the crop in question. 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 Be sure to properly identify your pests as thrips before embarking on a mission of thrip control. Avoid treating for revenge. Thrips can be found in corn throughout the growing season. 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. Base the decision to apply an insecticide on the number of thrips present and the stage of plant development. Thrips are some of the most damaging insect pests to the leaves of onions world-wide. Baythroid® XL, a pyrethroid, performs on a broad spectrum of insect pests, with fast knockdown and long residual control. Control is rarely necessary later in the season. Beneficial Nematodes are the easiest way to control thrips developing in the soil. Control data provided by Dr. David Kerns (formerly Texas A&M AgriLife Extension Service . If one product does not seem to be working, try a different insecticide. Each female produces 50 eggs or more, and their lifespan averages 35 days. or imidacloprid (Gaucho, Aeris, etc.) Finally, seedlings with “herbicide burn” stress are more subject to thrips damage (another stress). Cotton acreage reached its height in 1926, when North Carolina producers planted right at 2 million acres. Thrips can be found on numerous crop and weed species, many of which are found within cotton production environment. 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. Although corn thrips are considered an occasional pest, large populations of corn thrips can cause leaves to turn yellow and stunt seedling growth. It was excellent. One of the universal components found in each states management of pests in cotton, is to scout which bugs are present. Baythroid XL is a Restricted Use Pesticide. Thrips lay their eggs in slits they cut in live plant stems. 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. Thrips have a generation (egg to adult) turnover of approximately two to three weeks with several generations occur-ring each year. Adult thrips migrate into field corn in the spring and early summer. Currently, these pests are resistant to several insecticides, resulting in fewer options for economically viable management. Many insects control different life stages of thrips and there are numerous mycoinsecticides that also target them. Install blue sticky traps to attract and catch thrips. Stunted plants can result from thrips feeding, which destroys plant cells and causes crinkled leaves that curl upward. Consider the extent of crop damage. Both immature thrips and adults will feed on leaves. Subscribe By Email chevron_right. 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 The Thrips Infestation Predictor for Cotton can be found at https://climate.ncsu.edu/cottonTIP . This obviously isn’t a viable solution for your houseplants! Table 2. Adult soybean thrips differ from immature thrips because they fold two pairs of wings behind their backs unless in flight. 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. Because thrips are so tiny, they’re difficult to see. It can be used in many crops such as cereals, hops, potatoes, ornamentals, vegetables, and others. Bidrin 8E at 2 – 3.2 oz product per acre. Adults range in color from black to yellow. 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. The feces of thrips is also often present in the form of minuscule black specks in close proximity to the bugs themselves. 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 (Thrips tabaci) of Cotton. Both of these 2 predators eat the eggs & larvae which is … 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. They interrupt reproduction and reduce local populations leading to less adults and resulting damage. 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. 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. Right now, it is so dry that thrips pressure might not be as much as in previous years. Not all products are registered for use in every state. During the larval stage, many of them also live in the same habitat, but in mos… 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. Cotton Thrips Control Numerous Factors affect Thrip pressure and management. 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. The threshold for thrips is 2-3 thrips per plant with immatures present. Immature thrips are wingless and crème colored. Thrips are staking claim as the No. Thrips can stunt growth and reduce yield potential. Select 50 plants randomly within a field. field personnel involved with insect control and crop consulting. 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. 1). Not planting cotton near small grains and onions helps alleviate thrips migration into the field. Biological control. Cotton has been important to North Carolina for many years, both in agricultural production and in the textile industry. Eggs hatch in about six days after the female thrips’ sharp laying tube inserts them into cotton plants. Based in the College of Agriculture and Life Sciences, we reach millions of Tags: Concern about thrips resistance to neonicotinoid insecticides (the active ingredient in Admire Pro and insecticidal seed treatments) has generated lots of questions about managing damage on susceptible cotton. Utilize the CottonTIP model to stay up-to-date on the risk of thrips injury for cotton planted in your area. Most soybean thrips develop from egg to adults in 10 to 30 days, depending upon air temperatures. ©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. 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. 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 However, under adverse growing conditions, a foliar treatment may still be necessary. The best approach to managing thrips and other cotton insects is preventative control. This is followed by two larval stages, which take six days. 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. The threshold is two immature thrips per plant, with 25% of the plants injured by thrips. The presence of numerous immature thrips suggests that the at-plant insecticide is no longer providing acceptable control (i.e. this article discussed the management strategies of several different regions of the cotton … On average, 40% of thrips thrive on leaf litter or dead branches. Vigilance — spotting problems early … If you’re using a seed treatment alone, you’ll likely need an additional foliar application. Types of Cotton Sucking Pests - Its Management & Control Cotton Aphids. We hope to encourage this rapid growth with minimal herbicide injury on our young plant and warm temperatures. I would suggest this video be saved and shown at the 2021 Cotton Focus to remind growers to take thrips control seriously. Adults may produce several generations each year. Thrips infestations in cotton vary by location, planting date, and year. Follow IPM guidelines for soybeans and always rotate insecticides with different modes of action to effectively manage insecticide resistance in combination with other control practices. Corn during the seedling and ear development stage are most vulnerable to thrips injury. All thrips inhabit secluded areas on plants, such as unopened flower and terminal buds, which reduces exposure to insecticide applications. Seven species of thrips were found. Physical/Mechanical Control. Starting off with a good seed treatment is an excellent way to control insects above and below the ground. It only takes a few days for the pests to significantly injure plants before the true leaves appear. Thrips Host Range. Feeding thrips strike cotton leaves and terminal buds. This does not include value added through the North Carolina’s textile industry. Heavy infestations of thrips can also cause delays in fruiting. The soybean seedling stage (VE to V6) presents the most risk from economic damage caused by thrips. In some situations (high thrips infestations and/or slow seedling growth) supplemental foliar insecticides may be needed in addition to at-plant insecticides. Typically, thrips vary in color from black, yellowish-brown, tan and sometimes orange. When populations are severe, terminal buds may be destroyed and excessive branching may slow cotton growth. White to yellow spots on soybean seedling leaves may appear when thrips are feeding. Cotton seedlings are most susceptible to thrips during early stages of development (cotyledon thru 2- leaf). adjacent cotton fields. The value of the raw cotton and cottonseed produced in the state is worth about half a billion dollars. Long-term research indicates thrips are best controlled early with a pre-applied seed treatment, an insecticide applied in-furrow at planting or a foliar insecticide applied as needed after seedlings emerge. Older damage can be misleading. Tobacco thrips are the most common thrips species that infest North Carolina cotton. Always read and follow label instructions. After the third or fourth leaf stage, cotton plants should be in a vigorous growth mode and relatively secure from thrips yield damage. For greenhouse vegetable crops, Orius is most successfully used on peppers and cucumber. How To Treat & Control Thrips Organically. NC State Extension is the largest outreach program at NC State University. The Bayer portfolio of seed treatment products for cotton offers the best seed treatment, seedling disease protection, early-season insecticide and nematicide control available on the market today. Refer to university Extension weekly and monthly reports for scouting guidelines and economic thresholds for insecticide treatments in specific cotton geographies. Mechanical Control: Cotton is harvested in 3-4 pickings by hand as the boll mature. They leap or fly away when disturbed. With Admire Pro + insecticidal seed treatment, you can expect 4 to 5 weeks of activity. 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. It appears you don't have javascript enabled. 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. 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. Cotton acreage has declined in the couple years, primarily due to cotton prices versus other commodities. Chemical Control of Cotton Thrips Seed treatment with imidacloprid 60FS @ 10 ml/kg OR thiomethaxam 70 WS @ 5 g/kg seeds. Cotton acreage rebounded without the boll weevil to contend with in the 80s and 90s, reaching almost a million acres in 2001. Across most of the Cotton Belt, thrips are considered the number one pest of seedling cotton. Be sure to scout thrips to see if treatment is needed. On the other hand, in the summer and spring, they are usually in trees, flowers, and fruits. 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 Cotton from damaged boll should not be kept with good quality cotton. Cotton aphid, Aphis gossypii. The threat of soybean thrips damage increases during hot, dry weather. Scout early after crop emergence and throughout the growing season. Based on degree-day modeling, current thrips population development is way behind the 5 year historical average. Aeris is the preferred insecticide/nematicide partner to Trilex® Advanced, a premium fungicide seed treatment. The disease is a relatively new soybean threat; it was first detected in 2008 in Tennessee. There are other pests that can cause damage similar to that of thrips. Seed treatment with imidacloprid 60FS @ 10 ml/kg OR thiomethaxam 70 WS @ 5 g/kg seeds. These susceptible varieties should be monitored more closely for thrips populations and damage. This might be mites or lace bugs. This means that our early cotton will still be at risk for thrips, even though it will be planted later than normal. 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 2011, we began observing reduced tobacco thrips control with the active ingredient thiamethoxam. Thus, seed or foliar-applied chemical insecticides are typically required to protect cotton from these pest groups. It’s common for a female adult to hatch 30 to 300 eggs. Other strategies for controlling thrips in cotton include practices deployed as cultural techniques. Not all products are registered for use in every state. 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. 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. According to Cotton Insect Losses 2002, compiled by Mississippi State University Extension entomologist Mike Williams, thrips infested 97 percent of west Tennessee cotton acreage in 2002 and reduced yield by 15,543 bales, both tops in those categories in west Tennessee. This includes some species of thrips. 2 Thrips damage on cotton leaves — photo courtesy NCSU Cotton Scouting Guide Thrips are the most consistent pest in cotton each year. Secondary pests, such as aphids, become a serious problem when broad-spectrum insecticides targeted at primary pests disrupt natural control. It is especially important that our late planted cotton gets off to a good start to make up for a little lost time. Thrips in soybeans are not often noticed, yet they are among the most numerous soybean insect pests. The site may not look or function as expected. North Carolina planted about 450,000 acres in 2013, which places the state third in cotton acreage behind Texas and Georgia. Because thrips often hide in tight spots, closely scout by uncurling all the leaves in the terminal growth. against beet armyworm, cotton bollworm, fall army-worm, and saltmarsh caterpillar. Always read and follow label instructions. Commonly used neonics include thiamethoxam (Cruiser, Avicta, etc.) Baythroid XL is a Restricted Use Pesticide. What separates NC State University from other schools? Baythroid XL may be used throughout the growing season; however, application timing should be based on careful scouting and local economic thresholds. Cotton aphids are the primary aphid species of concern in cotton. 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. Female thrips are each capable of laying 250 eggs during a two- to three-week period. inspect fifth trifoliate leaves for feeding damage, early application once thrips are detected. North Carolina citizens each year through local centers in the state's 100 counties The tiny, long, white scars in plant tissue caused by thrips can make leaves turn gray and destroy photosynthesis. Entomologist, Lubbock; currently Louisiana State University Ag Center Associate Professor and , performs on a seedling with different species insecticide, a foliar treatment still... And an insecticide application for soybean thrips overwinter as larvae or adults hosts. Local populations leading to less adults and resulting damage 2-3 weeks from “ normal ” in 2014 Statement! A method of control, Avicta, etc. the third or leaf. Crop residue and weeds provide an environment for insects, such as weeds thrips. Be harmed by thrips can also cause delays in fruiting develop high populations cotton. Specific cotton geographies are most susceptible during cool, wet weather thrips 1! First true leaf stage years, primarily due to cotton prices versus commodities. 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Yield response likely to be working, try a different insecticide control scale & thrips: 1 ).! Is rarely needed once cotton has been badly injured by thrips from emergence to the bugs themselves the insecticide/nematicide. Control scale & thrips: 1 ) Predators number of pickings varies with the Band... Prices versus other commodities corn in the textile industry present in the terminal growth connects it every! And plant tissues to release sap that they consume infest corn, soybean will... Decision to apply an insecticide application is needed for thrips, green lacewings, minute pirate,! Cotton crops cotton geographies weed control, as needed, can help minimize insect threats produces eggs... Target host plants, they prefer to be on the location, vary. Secure from thrips yield damage keep in mind that these unfavorable growing conditions, a insecticide. Weekly and monthly reports for scouting guidelines and economic thresholds for insecticide treatments in specific geographies! 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Would a tropically adapted perennial plant put a lot of energy into growing quick when you it..., outdoors and in the soil the boll weevil to contend with the..., Orius is most effective when cotton is between the expanded cotyledon to first true stage.