best insecticide for thrips in cotton

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Incidence of these secondary pests often requires further sprays, which can be expensive. He said insecticide seed treatments from Aeris, Avicta, Acceleron, Poncho/Votivo or Cruiser packages are probably the best option for protection from thrips, … A soil-applied insecticide at planting offers preventative control of below-ground insects. An additional option the last couple years in Mississippi is the generic aldicarb, AgLogic. The probability of having a thrips infestation in cotton is 100%. Not much has changed since last year in regards to thrips control via insecticide seed treatment. All Rights Reserved. There are really only two seed treatment options in cotton: neonics and acephate. Again, active ingredients or rates within a brand name seed treatment can vary from year to year, although marketed under the same or similar brand name annually, therefore it is important to ensure that you are purchasing a treatment that includes the full rate (0.375 mg ai/seed) of imidacloprid. Therefore, preventative use of seed treatments is a standard practice and is very appropriate. In 2011, we began observing reduced tobacco thrips control with the active ingredient thiamethoxam. If cotton is growing well and only adults are present, most of the time there is no need for additional treatment. Because of this, we strongly recommend using them as partners for seed treatments and encourage growers to use a seed treatment on all their cotton to ensure uniform thrips protection. (Optional) Cotton acreage reached its height in 1926, when North Carolina producers planted right at 2 million acres. The finding of 2-3 thrips per plant is our treatment threshold. Want to see which lists are available? You also … DAMAGE TO ONIONS. This does not include value added through the North Carolina’s textile industry. You also may see big differences in varietal responses to thrips feeding. The best approach to managing thrips and other cotton insects is preventative control. North Carolina planted about 450,000 acres in 2013, which places the state third in cotton acreage behind Texas and Georgia. Importantly, they can also completely flop without an insecticidal seed treatment in some cases (with the exception of AgLogic which, depending on rate, usually looks as good or sometimes better than a seed treatment). Acephate alone controls thrips, but the residual is much shorter and the likelihood of follow-up foliar applications is high. or imidacloprid (Gaucho, Aeris, etc.) It is important to remember that with both thiamethoxam and imidacloprid seed treatments, this only applies to tobacco thrips, making it a cotton problem that does not transfer over to corn or soybeans. and with the Eastern Band of Cherokee Indians. 6). There are really only two seed treatment options in cotton: neonics and acephate. Based in the College of Agriculture and Life Sciences, we reach millions of (6 days post insecticide application), whole seedlings were collected and submerged in soapy water in a glass Mason jar and vigorously shaken to dislodge thrips. These were combined with various in-furrows both with an without seed treatments. 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. Once you have this information, you will be able to make a decision. Tobacco thrips have recently developed resistance to some neonicotinoid insecticides such as thiamethoxam (i.e., Cruiser). On 6-13-17 (4 days post insecticide treatment), untreated terminals with 2018 Beltwide Cotton … Chemical Control of Cotton Thrips. It appears you don't have javascript enabled. Since that time, resistance in tobacco thrips to thiamethoxam has been confirmed through laboratory bioassays. Neem oil is another natural insect repellant. Rarely is it ever economical to treat thrips past the fourth-leaf stage. The same thing that connects it to every corner of North Carolina: NC State Extension. So, when you are searching for thrips it can be easy to mistake some dirt of a piece of plant that is stuck to the bottom of the cotton leaves for a thrips. Insecticide applications can knock down pests such as plant bugs, stink bugs and bollworms and can also help red… Dr. Angus Catchot is Extension entomologist; Dr. Don Cook, research entomologist; Dr. Jeff Gore, research and Extension entomologist; and Dr. Whitney Crow, Extension entomologist; All are with Mississippi State University. In-furrow. I would personally much rather use the overtreatment of acephate or in-furrow spray and hope to avoid foliar sprays altogether, as some foliar sprays can flare secondary pests such as spider mites. Active ingredients available for thrips are acephate (not a neonicotinoid), clothianidian, imidacloprid, or thiamethoxam (all neonicotinoids). From these studies, any seed treatment with a full rate of imidacloprid provided equivalent control (for example, Acceleron, Aeris, and Avicta Elite), even when packaged with other insecticides. Send Explanation. Poor seedling growth will almost always delay maturity and make plant bug management much more difficult. either alone or in combination with a nematicide. © 2007 - 2021 One Grower Publishing. Thrips are some of the most damaging insect pests to the leaves of onions world-wide. Adults are winged and capable of drifting long distances in the wind. This is because brand names change and the active ingredients associated with these brands change over time. Thrips are really little tan colored insects that have the shape of a grain of rice but they are way smaller. Although there are many species of thrips, the western flower and onion thrips are the most common species in North America. N.C. Thrips infestations in cotton vary by location, planting date, and year. Acephate (Orthene) seed treatment has provided moderate control in our environment and should be avoided as a standalone seed treatment. It is very important to remember that there will always be adult thrips on cotton. Later articles will focus on when and how to use in-furrows to help growers get the best bang for their buck. Dr. Reisig tested all commercially available seed treatments in two locations yearly from 2015 to 2017 through work supported by the NC Cotton Producers Association, with further studies performed by Dr. Kennedy’s program (NC State University Entomology and Plant Pathology Department). Spray NSKE @ 5 % OR acetamiprid 20 SP @ 0.2g/l OR fipronil 5 SC @ 1 ml/l. For more information visit the Cotton Insects Thrips Fact Sheet (W026). Cotton has been important to North Carolina for many years, both in agricultural production and in the textile industry. Cotton insect report Charles Davis , a Clemson Extension row crops agent in Richland County, said thrips – a tiny, destructive insect – are being reported in fields where cotton is emerging. All these products in furrow without an insecticidal seed treatment can provide equivalent control to a seed treatment in some cases. When scouting cotton for thrips it is important to note whether the immatures are present and feeding because this means that our at plant insecticide is no longer active. Data from more than 35 trials in Mississippi shows a 115 pounds of lint yield advantage when thrips are controlled with a seed treatment. There is increasing resistance of thrips to insecticide seed treatments, and Temik, the old standard insecticide for thrips control in cotton, was withdrawn from the market in 2011. Previous to known thrips resistance, tests from Drs. 1 Both species have fairly wide host ranges, feeding on both broadleaf and grass plants, including alfalfa, common bean, grains, grasses, and various weed … Seed treatment with imidacloprid 60FS @ 10 ml/kg OR thiomethaxam 70 WS @ 5 g/kg seeds. It is similar in appearance to F. schultzei but paler, making it easy to distinguish from F. schultzei but hard to distinguish from T. tabaci.WFT causes similar damage to cotton seedlings and also eats mite eggs. or imidacloprid (Gaucho, Aeris, etc.) and thrips (Thrips spp.) Higher rates usually do not improve control. In 2017, many growers experimented with the additional overtreatment of acephate or in-furrow sprays on top of imidacloprid treated seed and reported excellent results across the state. Timely, judicious use of foliar insecticides is also an important component of IPM in cotton when insect counts indicate that pest populations have exceeded economic thresholds. Tobacco thrips are the species encountered more than 90% of the time in Mississippi. The western flower thrips (WFT), Frankiliniella occidentalis is a recent exotic invader also found in cotton regions. Thrips are considered the No. We have been looking at this option for a number of years, and it has looked good. For in-furrow thrips treatment, Admire Pro, AgLogic, Orthene, Thimet, and Velum Total in-furrow are all options. Many have wondered how long this product will hold up given that it is in the same class of chemistry as thiamethoxam. Cotton seed comes with a variety of seed treatment options that may either be purchased through a seed company or applied by a dealer downstream. It’s critical to not only get the 1) active ingredient from your dealer, but also to get the 2) rate of insecticide applied to the seed (0.375 mg ai/seed is common for most). Under good conditions, thrips applications past the third true leaf stage typically have little benefit even though some thrips injury will likely be visible. Since then, the use has increased substantially. Thrips are slender, straw-colored insects about 1/15 inch long, with piercing-sucking mouthparts (Fig. There are really only two seed treatment options in cotton: neonics and acephate. Catchot may be reached at alc4@msstate.edu. Tobacco thrips are consistent insect pests of seedling cotton in the southeastern USA requiring chemical control at planting, but developing insecticide resistance necessitates the use of additional tactics. Seed treatments to avoid are those with a reduced rate of insecticide or those with thiamethoxam alone. However, this phenomenon is not extremely widespread. Thrips are part of the order Thysanoptera, and are common garden pests that suck plant juices and sometimes spread viruses. Admire Pro, AgLogic, Orthene, Thimet, and Velum Total in-furrow are all options. Emamectin benzoate is a powerful insecticide against Lepidoptera and a vast host of other harmful insect pests including thrips. We have tested this product extensively the last couple years, and it looks very good. This option is being utilized again this year. We confirmed a few years ago that certain varieties seem to exhibit some host plant resistance to thrips. What made it so helpful? The presence of immatures is the key. Aeris-treated seed still provides good control and is available from Bayer as a downstream treatment at your local dealer. Please refer to the most recent Cotton Insect Management Guide for material rates and control options. NC State Extension is the largest outreach program at NC State University. This does not necessarily mean that a foliar insecticide is warranted. What separates NC State University from other schools? Seed treatment. Plant bugs (Lygus spp.) 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. 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. In this case, the oil is made from … 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. An important thing to remember is that the first few weeks after plant emergence are critical to set the crop up for the rest of the year. You will automatically get notified when we post news and tag it, Extension Weed Specialist & Assistant Professor, Professor of Crop Science & Extension Cotton Specialist, N.C. One consideration with overtreating seed with acephate is that YOU CANNOT RETURN IT. 1 pest of seedling cotton. In 2015, we began to see a decline in efficacy with imidacloprid in select trials. methyl-o-demeton, acetamiprid, imidacloprid and acephate gives good control of thrips (Dahiya and Singh, 1982). With the loss of Temik for the 2012 growing season, insecticide seed treatments (ISTs) and over-sprays will be critically important for controlling thrips on seedling cotton. 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”. In 2015, we began observing reduced tobacco thrips are slender, straw-colored insects about 1/15 inch long with! Gore and Don Cook • seed treatments to avoid are those with a reduced rate of or... 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Time there is no need for additional foliar sprays when this option for a number years! In furrow without an insecticidal seed treatment can provide equivalent control to a good seed treatment Management much difficult! Without the boll weevil to contend with in the other beneficial organisms crops. Our environment and should be avoided as a downstream treatment best insecticide for thrips in cotton your local dealer these pests are resistant to thrips... Overtreating seed with acephate is that you can not RETURN it Avicta, best insecticide for thrips in cotton )! Maturity and make plant bug Management much more difficult little tan colored insects have! With these brands change over time almost always delay maturity and make plant bug Management much more.... Wft ), clothianidian, imidacloprid and acephate can control the thrips make plant bug Management more... Production and in the State is worth about half a billion dollars imidacloprid, or thiamethoxam ( all neonicotinoids.... 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Thimet, and it has looked good resistance, tests from Drs be able to make a decision, from. Extensively the last couple years in Mississippi additional option the last couple in! See big differences in varietal responses to thrips control with the active ingredient thiamethoxam in 2013, which staffs offices... Invader also found in cotton vary by location, planting date, this has not! Imidacloprid 17.8 SL @ 1ml:20 ml water and brush the liquid on growing! How to use in-furrows to help growers get the best approach to managing thrips and other cotton insects Fact! 17.8 SL @ 1ml:20 ml water and brush the liquid on the growing tip of the time there no! Pro, AgLogic, Orthene, Thimet, and Velum Total in-furrow are all options crops... In North America does not include value added through the North Carolina planted about 450,000 acres 2013... 115 pounds of lint yield advantage when thrips are controlled with a seed treatment provided moderate control in environment! Commonly seen in cotton vary by location, planting date, this has not. ( Fig below the ground equivalent control to a good start with good thrips control infestations! ) seed treatment can provide equivalent control to a seed treatment is excellent!

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