The best defense against thrips is a rapidly growing cotton … Subscribe By Email chevron_right. 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is important to note whether the immatures are present and feeding because this means that our at plant insecticide is no longer active. 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. NC State Extension is the largest outreach program at NC State University. Chemical Control of Cotton Thrips. 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. Under good conditions, thrips applications past the third true leaf stage typically have little benefit even though some thrips injury will likely be visible. and with the Eastern Band of Cherokee Indians. These were combined with various in-furrows both with an without seed treatments. Seed treatments to avoid are those with a reduced rate of insecticide or those with thiamethoxam alone. We have been looking at this option for a number of years, and it has looked good. When immatures are showing up, this means that seed treatments are beginning to break down and reproduction is taking place. 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.”. Higher rates usually do not improve control. Stem smearing with imidacloprid 17.8 SL @ 1ml:20 ml water and brush the liquid on the growing tip of the plant. 2020 recommendations for controlling thrips in cotton. Data from more than 35 trials in Mississippi shows a 115 pounds of lint yield advantage when thrips are controlled with a seed treatment. Neem oil is another natural insect repellant. 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. Poor seedling growth will almost always delay maturity and make plant bug management much more difficult. Finally, you have foliar rescue treatments as an option. You also … A foliar treatment may also be needed in some cases. This is because brand names change and the active ingredients associated with these brands change over time. Most reported no need for additional foliar sprays when this option was chosen. Want to see which lists are available? or imidacloprid (Gaucho, Aeris, etc.) There are really only two seed treatment options in cotton: neonics and acephate. In 2011, we began observing reduced tobacco thrips control with the active ingredient thiamethoxam. 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. 1 pest of seedling cotton. The presence of immatures is the key. The probability of having a thrips infestation in cotton is 100%. Cotton seed comes with a variety of seed treatment options that may either be purchased through a seed company or … 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. In some situations (high thrips infestations and/or slow seedling growth) supplemental foliar insecticides may be needed in addition to at-plant insecticides. Thrips are really little tan colored insects that have the shape of a grain of rice but they are way smaller. Bacheler and Reisig indicated that, among the three types of neonicotinoids, responses from thrips varied from year to year and location to location. It shows selectivity in the other beneficial organisms in crops such as cotton, tomato, Burberry, apple, and many others. North Carolina citizens each year through local centers in the state's 100 counties It is very important to remember that there will always be adult thrips on cotton. Rarely is it ever economical to treat thrips past the fourth-leaf stage. Admire Pro, AgLogic, Orthene, Thimet, and Velum Total in-furrow are all options. 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. © 2007 - 2021 One Grower Publishing. 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. Tobacco thrips have recently developed resistance to some neonicotinoid insecticides such as thiamethoxam (i.e., Cruiser). What made it so helpful? Catchot may be reached at alc4@msstate.edu. Cotton acreage has declined in the couple years, primarily due to cotton prices versus other commodities. Therefore, preventative use of seed treatments is a standard practice and is very appropriate. 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. Send Explanation. Not much has changed since last year in regards to thrips control via insecticide seed treatment. An additional option the last couple years in Mississippi is the generic aldicarb, AgLogic. Emamectin benzoate is a powerful insecticide against Lepidoptera and a vast host of other harmful insect pests including thrips. Cooperative Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians. Preventative in-furrow insecticides or seed treatments are recommended. We no longer recommend thiamethoxam in Mississippi on cotton (still an option on other crops). As a result, we have switched over almost exclusively to imidacloprid-based products. Acephate alone controls thrips, but the residual is much shorter and the likelihood of follow-up foliar applications is high. 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. Thrips are some of the most damaging insect pests to the leaves of onions world-wide. Tobacco thrips are the species encountered more than 90% of the time in Mississippi. Application of systemic insecticides in-furrow or seed treatment provides preventative control from early season pests, such as thrips. 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). It appears you don't have javascript enabled. He said insecticide seed treatments from Aeris, Avicta, Acceleron, Poncho/Votivo or Cruiser packages are probably the best option for protection from thrips, … 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. either alone or in combination with a nematicide. The finding of 2-3 thrips per plant is our treatment threshold. 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). We confirmed a few years ago that certain varieties seem to exhibit some host plant resistance to thrips. What separates NC State University from other schools? Cotton has been important to North Carolina for many years, both in agricultural production and in the textile industry. 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. 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). Spraying systemic insecticide such as acetamiprid, methyl-o-demeton, imidacloprid and acephate can control the thrips. 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. Some of these may be packaged with nematicides, such as abamectin and thiodicarb, that have some activity on thrips. Let’s get the 2020 cotton season off to a good start with good thrips control. North Carolina planted about 450,000 acres in 2013, which places the state third in cotton acreage behind Texas and Georgia. 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. DAMAGE TO ONIONS. 6). Spray NSKE @ 5 % OR acetamiprid 20 SP @ 0.2g/l OR fipronil 5 SC @ 1 ml/l. BACKGROUND. Plant bugs (Lygus spp.) The boll weevil arrived in the state that year and acreage dropped until the weevil was eradicated in the late 70s and early 80s. For more information visit the Cotton Insects Thrips Fact Sheet (W026). “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. The best approach to managing thrips and other cotton insects is preventative control. To date, this has still not fully materialized. Commonly used neonics include thiamethoxam (Cruiser, Avicta, etc.) 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. Dyna-Gro’s Neem Oil. 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. Currently, these pests are resistant to … and thrips (Thrips spp.) in Breaking News, Production, • By Whitney Crow, Angus Catchot, Jeff Gore and Don Cook •. In this case, the oil is made from … Starting off with a good seed treatment is an excellent way to control insects above and below the ground. To treat thrips past the fourth-leaf stage a thrips infestation in cotton 21, 2020 in Breaking,! Control with the Eastern Band of Cherokee Indians past the fourth-leaf stage acres in.. 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