Journal of Economic Entomology. In our area, and across most of the cotton belt, thrips are considered the number one pest of seedling cotton. These insecticides systemically enter a seedling cotton plant through water uptake in the root system and control thrips that feed on above-ground tissue. Cotton has been important to North Carolina for many years, both in agricultural production and in the textile industry.
Cotton can be protected with an insecticide seed treatment, an in-furrow application, and/or a foliar spray. and with the Eastern Band of Cherokee Indians. Stewart says his Tier 1 products for plant bug control are Transform (which is used under a Section 18), Orthene, Diamond, and Bidrin. Foliar application timing for thrips is most effective when cotton is between the expanded cotyledon to first true leaf stage (see photo). Stewart S D, Akin DS, Reed, J, Bacheler J, Catchot A, Cook D, Gore J, Greene JK, Herbert A, Jackson RE, Kerns DL, Leonard BR, Lorenz GM, Micinski S, Reisig D, Roberts P, Studebaker G, Tindall K, Toews M. Survey of thrips species infesting cotton across the southern US Cotton Belt. In the low desert growing areas where Bt cottons are used, Delta Bt cotton appears to be more susceptible to damage by western flower thrips. Thrips Control: Monitoring & Prevention – Inspect plants early and often for signs of thrips activity or damage. Why would a tropically adapted perennial plant put a lot of energy into growing quick when you plant it in North Carolina? 3444. Csizinszky AA, Schuster DJ, Kring JB. Thrips are tiny, slender insects less than 0.06 inch (1.55 mm) long. Registered in England and Wales.
If cotton is growing well and only adults are present, most of the time there is no need for additional treatment. Based in the College of Agriculture and Life Sciences, we reach millions of Thrips are considered the No. Thrips (Thysanoptera: Thripidae) are the most consistent and predictable insect pests of Upland cotton, Gossypium hirsutum L., in South Carolina and much of the southeastern United States. We recommend using a seed treatment or an in-furrow application. 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. 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. NATO ASI Series (Series A: Life Sciences), Vol 276. “The dry weather has taken a toll on the wheat that we use primarily for a cover crop, planted on turnrows, and sometimes in the field. Thrips damage on cotton leaves — photo courtesy NCSU Cotton Scouting Guide Thrips are the most consistent pest in cotton each year. 2017 Aug;110(4):1563–1575. Heavy plant residue at the time of cotton planting can also reduce thrips populations and damage to cotton. Depending on the location, thrips may be behind 2-3 weeks from “normal” in 2014. “We often tank mix it with Orthene, Bidrin, or Centric, since Diamond doesn’t control adult plant bugs. North Carolina State University. We have tested this product extensively the last couple years and it looks very good. Influence of tillage and deep rooted cool season cover crops on soil properties, pests, and yield responses in cotton. 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. Inheritance and transfer of thrips resistance from Pima cotton to Upland cotton. North Carolina citizens each year through local centers in the state's 100 counties Of these strategies, mulching films or other reflective ground surfaces have been shown to reduce thrips, aphids, and whiteflies in tomatoes35 and other crops.36 Screens and materials blocking ultraviolet light37 can provide greenhouse crops with some protection, but the implementation of physical or mechanical control strategies in field crops, such as cotton, are challenging, cost-prohibitive, and questionably effective. In the Mid-South, we have some concerns about development of resistance to neonicotinoids like Centric and imidacloprid, which we’ve been relying on for early-season control of adults. Afterward, the threshold goes up to 15 bugs per 100 sweeps. 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”. Moist soil does not equal saturated soil. © 2007 - 2020 One Grower Publishing. Since that time, harvest has been completed and the link below has been updated to reflect. We also have a few other mailing lists you can subscribe to. Right now, it is so dry that thrips pressure might not be as much as in previous years. We do have to address them in certain fields, but it is more a one-shot situation instead of multiple sprays. A saturated stand will not grow well and will be more at risk for thrips. 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. We recommend moving this block and the preceding CSS link to the HEAD of your HTML file. Poor seedling growth will almost always delay maturity and make plant bug management much more difficult. The most predictable insect pest of cotton in the Southeast continues to be tobacco thrips, and thrips are certainly the most important group of insects on seedling cotton in the region, says Jeremy Greene, Clemson University entomologist. The predominant species infesting and causing injury to seedling cotton in the Southeast is the tobacco thrips, Frankliniella fusca (Hinds) (figure 2), as it readily reproduces on and colonizes the crop, but other species of less importance are present.3,4.
Thrips remain the top early-season pest in west Texas cotton, says Kerry Siders, Texas A&M AgriLife Extension IPM agent. Haviland, UC Cooperative Extension, Kern County and UC IPM Program, V. M. Barlow, UC Cooperative Extension, Riverside County and UC IPM Program, E. E. Grafton-Cardwell, Kearney Agricultural Research and Extension Center, Parlier. 30 p. Issued March 2020. Young cotton plant damaged by thrips feeding. Bean thrips outbreaks most commonly occur where there are abandoned fields or pasture areas with an abundant growth of prickly lettuce and morningglory, or field bindweed. Since then, the use has increased substantially. 2011 Oct. 2(2):1–9. The same thing that connects it to every corner of North Carolina: NC State Extension. Control strategies rely heavily on chemical control used at planting, but issues with insecticide resistance are emerging that compel the use of additional tactics. Wheat and weeds act as a host crop for thrips before we plant cotton. The threshold is two immature thrips per plant, with 25% of the plants injured by thrips. Immatures of the tobacco thrips are wingless, yellow, and smaller than adults (figures 2 and 4). Greene JK. South Carolina pest management handbook, cotton insect management. Pakistan Journal of Biological Sciences. In 2017, many growers experimented with the additional overtreatment of acephate or in-furrow sprays and reported excellent results across the state. 2014 Oct ;199(3):373–383. The role of morphological and chemical plant traits imparting resistance in Bt cotton genotypes against thrips. MONITORING SPIDER MITES, APHIDS, AND THRIPS, pesticide's properties and application timing, © 2017 Regents of the University of California, Division of Agriculture and Natural Resources.
In 2015, we began to see a decline in efficacy with imidacloprid in select trials. Curvularia leaf spot and southern corn leaf blight were the two most commonly observed diseases. In this case, separate trips over the field should be made. As cotton grows, insecticides applied at planting become diluted and are metabolized into derivatives in plants and lose effectiveness. App.