Dan Anco Comments Clemson Peanut Notes No. 124 2024
Find this article at: go.ncsu.edu/readext?1011093
— Written By David Jordanen Español / em Português
Español
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 ▲
Dry and hot now and looks like into the week ahead for parts. Peanut has some flexibility for water during this part of the season compared to later during pod fill, but some good and needed rain will go a long way in helping them all the more. Hot and dry conditions can increase insect activity as well as some diseases including but not limited to white mold and the less frequent Diplodia collar rot. Not many options should Diplodia come around for dryland fields, as it is mostly a disease during stressful conditions that is more cosmetic than economically damaging.
Delaying fungicide application?
Can we delay our fungicide applications with it being so dry and hot? We do have some flexibility as far as leaf spot is concerned to delay a few days. If a field with a susceptible cultivar has some history of white mold/stem rot in it, hot and dry conditions are favorable for its development, in which case extended delaying would not be optimal for its management.
Paraquat burn on peanut can look unpleasant but keeping the application inside the recommended window (28 days after cracking, ballpark 35 days after planting) bodes well for its recovery without a drag on yield.
Cadre is compatible to be applied with several fungicides, including Bravo or Lucento or Provysol, or several others.
TSW
Symptoms of infection by tomato spotted wilt virus are starting to show more prominently in earlier planted fields. Visual symptoms in the canopy range from chlorotic yellowing, to ring spots, to mottling, stunting, and more. Our management options for this disease are preventative in nature, effectively being sealed and finalized once planting is finished. Taking notes now will allow their use for consideration when planning next year’s production practices.
As a general precaution, avoiding mowing around peanut fields during prolonged hot and dry conditions will help to reduce movement of pests (mites) into fields if present.
LCB
Continued hot and dry weather is also favorable for lesser cornstalk borer. Larvae can be damaging to peanut by boring into plant tissues above and below ground and have been associated with increasing risk for Aspergillus flavus, aflatoxin, and white mold. LCB is more common in highly sandy soils. Pictures of the larvae, silk tubes they create on the peanut plant, and a pupa are included in the attached pictures from a dryland sandy field. Like some other insects, LCB can more preferentially land on and be first found on more isolated plants with a gap around them (skippy sections). To scout a field, at least 10 different spots should be looked at for the presence of larvae or pupae. If between 10 and 30% of plant spots have larvae or pupae, treatment is recommended with a targeted insecticide such as chlorantraniliprole (Vantacor/Prevathon/Shenzi) or novaluron (Diamond). If plants are not yet pegging, I would use the higher threshold (~25 to 30%) versus a more conservative lower threshold (~10%) if actively pegging with pod fill having begun.
