Starting off with a good seed treatment is an excellent way to control insects above and below the ground. Many have wondered how long this product will hold up given that it is in the same class of chemistry as thiamethoxam. Producers can reduce the chance of early infestations by using treated seed, an in-furrow liquid insecticide contacting the seed through an orifice spray or seed firmer, or the in-furrow granular insecticide aldicarb. or imidacloprid (Gaucho, Aeris, etc.) Acephate alone controls thrips, but the residual is much shorter and the likelihood of follow-up foliar applications is high. This option is being utilized again this year. 1 pest of seedling cotton. and thrips (Thrips spp.) © 2007 - 2021 One Grower Publishing. Spraying systemic insecticide such as acetamiprid, methyl-o-demeton, imidacloprid and acephate can control the thrips. Cotton acreage rebounded without the boll weevil to contend with in the 80s and 90s, reaching almost a million acres in 2001. North Carolina citizens each year through local centers in the state's 100 counties Also, there are many “look-a-like” thrips symptoms commonly seen in cotton from sandblasting and the use of residual herbicides. If Aeris is not an option, I would strongly consider having your dealer over-treat your imidacloprid treated seed with acephate (6.4 oz/cwt). Tobacco thrips have recently developed resistance to some neonicotinoid insecticides such as thiamethoxam (i.e., Cruiser). 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. To date, this has still not fully materialized. Thrips management is very limited with the only options being a preventative seed treatment or foliar rescue application of Bidrin, Orthene, Dimethoate, Radiant or Intrepid Edge. Read our Commitment to Diversity | Read our Privacy Statement. Commonly used neonics include thiamethoxam (Cruiser, Avicta, etc.) (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. You also … 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”. This does not necessarily mean that a foliar insecticide is warranted. Rarely is it ever economical to treat thrips past the fourth-leaf stage. 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. DAMAGE TO ONIONS. Subscribe By Email chevron_right. We confirmed a few years ago that certain varieties seem to exhibit some host plant resistance to thrips. A foliar treatment may also be needed in some cases. Seed treatment with imidacloprid 60FS @ 10 ml/kg OR thiomethaxam 70 WS @ 5 g/kg seeds. Thrips are slender, straw-colored insects about 1/15 inch long, with piercing-sucking mouthparts (Fig. Previous to known thrips resistance, tests from Drs. A soil-applied insecticide at planting offers preventative control of below-ground insects. Most reported no need for additional foliar sprays when this option was chosen. and with the Eastern Band of Cherokee Indians. Therefore, preventative use of seed treatments is a standard practice and is very appropriate. 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). There are really only two seed treatment options in cotton: neonics and acephate. All these products in furrow without an insecticidal seed treatment can provide equivalent control to a seed treatment in some cases. 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 presence of immatures is the key. Seed treatments to avoid are those with a reduced rate of insecticide or those with thiamethoxam alone. 1 Both species have fairly wide host ranges, feeding on both broadleaf and grass plants, including alfalfa, common bean, grains, grasses, and various weed … Cotton seed comes with a variety of seed treatment options that may either be purchased through a seed company or … “All these products in-furrow without an insecticidal seed treatment can provide equivalent control to a seed treatment in some cases,” Reisig pointed out in a blog posting. Emamectin benzoate is a powerful insecticide against Lepidoptera and a vast host of other harmful insect pests including thrips. BACKGROUND. It appears you don't have javascript enabled. 6). Cotton acreage has declined in the couple years, primarily due to cotton prices versus other commodities. Data from more than 35 trials in Mississippi shows a 115 pounds of lint yield advantage when thrips are controlled with a seed treatment. 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. Chemical Control of Cotton Thrips. 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. All Rights Reserved. Acephate (Orthene) seed treatment has provided moderate control in our environment and should be avoided as a standalone seed treatment. Cooperative Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians. Bacheler and Reisig indicated that, among the three types of neonicotinoids, responses from thrips varied from year to year and location to location. Thrips management is very limited with the only options being a preventative seed treatment or foliar rescue application of Bidrin, Orthene, Dimethoate, Radiant, or Intrepid Edge. Higher rates usually do not improve control. Currently, these pests are resistant to … 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. There are really only two seed treatment options in cotton: neonics and acephate. 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. The same thing that connects it to every corner of North Carolina: NC State Extension. What separates NC State University from other schools? However, this phenomenon is not extremely widespread. 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. Thrips infestations in cotton vary by location, planting date, and year. are two of the most economically important insect pest groups impacting cotton production in the USA today, but are not controlled by current transgenic cotton varieties.Thus, seed or foliar‐applied chemical insecticides are typically required to protect cotton from these pest groups. We have been looking at this option for a number of years, and it has looked good. Under good conditions, thrips applications past the third true leaf stage typically have little benefit even though some thrips injury will likely be visible. Commonly used neonics include thiamethoxam (Cruiser, Avicta, etc.) An additional option the last couple years in Mississippi is the generic aldicarb, AgLogic. 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. Preventative in-furrow insecticides or seed treatments are recommended. 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. The finding of 2-3 thrips per plant is our treatment threshold. Dyna-Gro’s Neem Oil. For more information visit the Cotton Insects Thrips Fact Sheet (W026). in Breaking News, Production, • By Whitney Crow, Angus Catchot, Jeff Gore and Don Cook •. When thresholds are met or exceeded, options for foliar sprays of insecticides include, but are not limited to, the organophosphates acephate, dicrotophos, dimethoate, and the spinosyn 11 spinetoram as the most efficacious materials available for post-planting control of … Finally, you have foliar rescue treatments as an option. Admire Pro, AgLogic, Orthene, Thimet, and Velum Total in-furrow are all options. either alone or in combination with a nematicide. It is very important to remember that there will always be adult thrips on cotton. The most common species of plant-feeding thrips in Texas cotton include flower thrips, onion thrips, and western flower thrips. 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. For in-furrow thrips treatment, Admire Pro, AgLogic, Orthene, Thimet, and Velum Total in-furrow are all options. 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. This is because brand names change and the active ingredients associated with these brands change over time. Let’s get the 2020 cotton season off to a good start with good thrips control. What made it so helpful? Since that time, resistance in tobacco thrips to thiamethoxam has been confirmed through laboratory bioassays. 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. Active ingredients available for thrips are acephate (not a neonicotinoid), clothianidian, imidacloprid, or thiamethoxam (all neonicotinoids). We have tested this product extensively the last couple years, and it looks very good. One consideration with overtreating seed with acephate is that YOU CANNOT RETURN IT. Application of systemic insecticides in-furrow or seed treatment provides preventative control from early season pests, such as thrips. The boll weevil arrived in the state that year and acreage dropped until the weevil was eradicated in the late 70s and early 80s. Your rating: Adults are winged and capable of drifting long distances in the wind. Although there are many species of thrips, the western flower and onion thrips are the most common species in North America. In 2011, we began observing reduced tobacco thrips control with the active ingredient thiamethoxam. In-furrow. If cotton is growing well and only adults are present, most of the time there is no need for additional treatment. March 21, 2020 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. Spray NSKE @ 5 % OR acetamiprid 20 SP @ 0.2g/l OR fipronil 5 SC @ 1 ml/l. In some situations (high thrips infestations and/or slow seedling growth) supplemental foliar insecticides may be needed in addition to at-plant insecticides. Incidence of these secondary pests often requires further sprays, which can be expensive. In 2011, we began observing reduced tobacco thrips control with the active ingredient thiamethoxam. 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. You also may see big differences in varietal responses to thrips feeding. As a result, we have switched over almost exclusively to imidacloprid-based products. Not much has changed since last year in regards to thrips control via insecticide seed treatment. (Optional) In this case, the oil is made from … This does not include value added through the North Carolina’s textile industry. Seed treatment. Some of these may be packaged with nematicides, such as abamectin and thiodicarb, that have some activity on thrips. 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. Once you have this information, you will be able to make a decision. Neem oil is another natural insect repellant. or imidacloprid (Gaucho, Aeris, etc.) 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. Some of the more popular choices for thrips control in Kansas are the seed treatment thiamethoxam, planting-time applications of acephate and phorate, or foliar treatments of a low rate of dimethoate or acephate. NC State Extension is the largest outreach program at NC State University. “It’s impressive technology, and it’s important to us now because we’re seeing issues with seed treatments controlling thrips,” Stewart says. The best defense against thrips is a rapidly growing cotton … 2020 recommendations for controlling thrips in cotton. Please refer to the most recent Cotton Insect Management Guide for material rates and control options. Cotton acreage reached its height in 1926, when North Carolina producers planted right at 2 million acres. The western flower thrips (WFT), Frankiliniella occidentalis is a recent exotic invader also found in cotton regions. 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. Aeris-treated seed still provides good control and is available from Bayer as a downstream treatment at your local dealer. Insecticide applications can knock down pests such as plant bugs, stink bugs and bollworms and can also help red… Active ingredients available for thrips are acephate (not a neonicotinoid), clothianidian, imidacloprid, or thiamethoxam (all neonicotinoids). Thrips are some of the most damaging insect pests to the leaves of onions world-wide. The site may not look or function as expected. Want to see which lists are available? 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. When immatures are showing up, this means that seed treatments are beginning to break down and reproduction is taking place. 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. 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. Additionally, if you are set up to spray in-furrow, acephate at 0.75-1 lb/acre is a very good option in addition to an imidacloprid seed treatment but not in place of. Lots of folks are wondering what to use downstream for thrips in cotton. N.C. 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. The best foliar insecticide application timing for thrips control is the one- to two-leaf cotton stage for maximum economic returns; however, this does not line up  well with residual herbicide applications, so insecticide applications are often considered an “extra trip.”. Send Explanation. 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. It shows selectivity in the other beneficial organisms in crops such as cotton, tomato, Burberry, apple, and many others. Based in the College of Agriculture and Life Sciences, we reach millions of In 2015, we began to see a decline in efficacy with imidacloprid in select trials. UT recommends the following insecticides: Acephate or Orthene (90 or 97%) at 0.20 – 0.25 lbs product per acre. Thrips are really little tan colored insects that have the shape of a grain of rice but they are way smaller. Thrips are part of the order Thysanoptera, and are common garden pests that suck plant juices and sometimes spread viruses. Stem smearing with imidacloprid 17.8 SL @ 1ml:20 ml water and brush the liquid on the growing tip of the plant. 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. Tobacco thrips are the species encountered more than 90% of the time in Mississippi. The best approach to managing thrips and other cotton insects is preventative control. either alone or in combination with a nematicide. methyl-o-demeton, acetamiprid, imidacloprid and acephate gives good control of thrips (Dahiya and Singh, 1982). The value of the raw cotton and cottonseed produced in the state is worth about half a billion dollars. Some of these may be packaged with nematicides, such as abamectin and thiodicarb, that have some activity on thrips. We no longer recommend thiamethoxam in Mississippi on cotton (still an option on other crops). Catchot may be reached at alc4@msstate.edu. Plant bugs (Lygus spp.) 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). Resistance in tobacco thrips to thiamethoxam has been important to remember that there will always be adult on... Fact Sheet ( W026 ) an option following insecticides: acephate or Orthene ( 90 or 97 % ) 0.20! Occidentalis is a recent exotic invader also found in cotton is 100 % a good start with good thrips with! 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