Imidacloprid and Tomato Spotted Wilt Peanut Notes No. 47 2023

— Written 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 ▲


Will increasing the rate of Admire to 16 oz help with tomato spotted virus or is it better to use another product and no Admire? YOUR thoughts?


Increasing the rate will not help on tomato spotted wilt. A higher rate might help on consistency of thrips control but not spotted wilt. In fact, research in the southeast (GA, FL, AL) and SC shows that spotted wilt increases with use of Admire Pro or generic imidacloprid. We have been able to use these products because we have generally planted towards the middle of May, increased or seeding rates and our varieties have good resistance to spotted wilt (Emery being an exception.) There is a clear relationship of imidacloprid use and more spotted wilt in areas of the US where the virus is found at high levels. We don’t know the exact mechanism of increased spotted wilt, but it may be that imidacloprid makes thrips “annoyed” and they move around, and more plants receive the virus. Many of them die from the insecticide but not before they infect more plants. Resistance in our thrips populations to imidacloprid is only going to allow more movement of thrips and more transmission of virus.
Thimet/Phorate is the best approach for spotted wilt. Across the peanut belt we consistently see less virus with these products. This insecticide turns on an immune response to the virus. Sometimes we need to apply acephate after Thimet. But that is no different than what we have been seeing with Admire Pro and generics. Control by Admire Pro has clearly dropped off. We are needing a follow up of acephate almost all the time these days.
We are sliding back to earlier planting dates and some folks are cutting back their seeding rates. That creates much greater risk for spotted wilt. We may see more issues with greater spotted wilt after Admire Pro because we are opening the door for this virus by our practices. Thimet can serve as a good buffer against it. We just need to get our insecticide boxes up and going again.
I agree 100% with everything David said. AgLogic remains our most effective at plant treatment, but phorate provides some level of protection against the virus in addition to the thrips control.