Regional Insecticide Recommendations for Plant Bugs
go.ncsu.edu/readext?866885
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.
Português
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
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 ▲Article by D. Reisig and A. Huseth
A recent survey of commercial fields in North Carolina provided data verifying the long-known regional nature of tarnished plant bug (aka Lygus bug). Furthermore, recent studies have demonstrated that higher minimum temperatures and a greater area planted to wheat and soybean has likely contributed to the increase of tarnished plant bugs in North Carolina cotton. Unfortunately, we expect tarnished plant bug to continue to be a major pest in North Carolina cotton based on these results.
Because of the regional nature of this pest, some growers can count on multiple sprays for tarnished plant bug a year, while others might only spray once, or some not at all. Furthermore, insecticide efficacy varies across the year, with some insecticides becoming less effective as the year progresses. In addition, growers need to be cautious using more broad-spectrum insecticides early in the season to preserve beneficial insects. Also important, is that we have documented pyrethroid resistance in North Carolina. So these should only be used as a tank mix partner and with caution (bifenthrin is an example of a pyrethroid). We have formulated a set of recommendations to reflect these expectations.
For growers expecting to spray one time during the season, select one of these insecticides if the spray is made in June, July through early August, or mid-August through September. If additional sprays are needed, do not follow with the same insecticide class (see Table 1 at end).
For growers expecting to spray up to three times during the season, select these insecticides if the spray is made in June, July through early August, or mid-August through September. If additional sprays are needed, do not follow with the same insecticide class (see Table 1 at end). fb = followed by
For growers expecting to spray up to three times during the season, select these insecticides if the spray is made in June, July through early August, or mid-August through September. If additional sprays are needed, do not follow with the same insecticide class (see Table 1 at end), except in July and August. Try to tank mix neonicotinoids (Admire Pro or Centric) or Diamond with Transform during this period. fb = followed by
Before you spray for tarnished plant bug in cotton, be sure you have reached the economic threshold. North Carolina research shows that the most consistent way to maximize economic returns when managing tarnished plant bug is to scout weekly and to treat when the economic threshold is reached (prior to bloom, 8 adults in 100 sweeps AND <80% square retention; post-bloom, 2-3 immatures per drop cloth sample).
Table 1. Insecticide trade name, active ingredient, and action classification
| Trade name | Active ingredient | Mode of action classification | Notes |
|---|---|---|---|
| Admire Pro | imidacloprid | 4a | A poor stand-alone insecticide, but good as a tank mix |
| Bidrin | dicrotophos | 2b | Harsh on beneficials |
| Centric | thiamethoxam | 4a | Not as effective after June |
| Diamond | novaluron | 15 | Only active on immatures |
| Orthene | acephate | 2b | Harsh on beneficials |
| Transform | sulfoxaflor | 4c | Considered a different MOA from 4a |