It’s Time to Evaluate Emerged Cotton for Thrips and Other Factors (Collins, Reisig, Edmisten, & York)

— Written By and last updated by
en Español / em Português

El inglés es el idioma de control de esta página. En la medida en que haya algún conflicto entre la traducción al inglés y la traducción, el inglés prevalece.

Al hacer clic en el enlace de traducción se activa un servicio de traducción gratuito para convertir la página al español. Al igual que con cualquier traducción por Internet, la conversión no es sensible al contexto y puede que no traduzca el texto en su significado original. NC State Extension no garantiza la exactitud del texto traducido. Por favor, tenga en cuenta que algunas aplicaciones y/o servicios pueden no funcionar como se espera cuando se traducen.


Inglês é o idioma de controle desta página. Na medida que haja algum conflito entre o texto original em Inglês e a tradução, o Inglês prevalece.

Ao clicar no link de tradução, um serviço gratuito de tradução será ativado para converter a página para o Português. Como em qualquer tradução pela internet, a conversão não é sensivel ao contexto e pode não ocorrer a tradução para o significado orginal. O serviço de Extensão da Carolina do Norte (NC State Extension) não garante a exatidão do texto traduzido. Por favor, observe que algumas funções ou serviços podem não funcionar como esperado após a tradução.


English is the controlling language of this page. To the extent there is any conflict between the English text and the translation, English controls.

Clicking on the translation link activates a free translation service to convert the page to Spanish. As with any Internet translation, the conversion is not context-sensitive and may not translate the text to its original meaning. NC State Extension does not guarantee the accuracy of the translated text. Please note that some applications and/or services may not function as expected when translated.

Collapse ▲

The 2015 crop is generally off to a very good start. So far, we have had excellent planting weather for most parts of the cotton belt. Warm temperatures have resulted in vigorous growth and rainfall has been timely for the most part. There are of course a few exceptions where growers experienced dry conditions in some areas and heavy packing rains in others, however, most of the emerged cotton I’ve seen to date looks very good.

For early May planted cotton, thrips control of seed treatments is likely beginning to diminish, therefore growers need to be actively scouting for thrips damage to determine if foliar sprays are justified. Please see Should You Spray for Cotton Thrips, a previous article from Dr. Reisig concerning thrips control options and the timeliness of foliar sprays. We have yet to experience our major thrips flight from weedy hosts into cotton. There will be several fields that do not need any foliar sprays, as growth has been quite vigorous and at-planting control measures have sufficed. However, this can only be determined through frequent and thorough scouting. Remember that cotton is most sensitive to thrips damage at the 1st true leaf stage, which is illustrated in the photos below. Although foliar sprays at later stages may occasionally benefit yields, targeting sprays at the 1st true leaf has been proven to be the most effective.

Target foliar sprays to 1st true leaf

Growers should also pay attention to any herbicide injury that may have occurred. Herbicide injury, as illustrated in the photos below, slows down seedling growth, allowing thrips to feed longer on developing leaves. In many cases, at-planting control measures may expire before seedlings “come out” of any transient herbicide injury and reach the 4-5-leaf “safe stage” from thrips. A well-timed foliar spray, when scouting has suggested that thrips are present, can alleviate most issues related to herbicide injury.

Increased thrips injury resulting from herbicide injury