Dan Anco Comments Peanut Notes No. 93 2024

Find this article at:
go.ncsu.edu/readext?1007873
— Written By
en 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 ▲
LLS on Volunteers
Similar to recent years, the end of May/beginning of June has brought visible late leaf spot lesions on a limited number of peanut volunteers. Most show no signs of infection. Those that do have so far been susceptible varieties in parts of fields where severe infections and defoliation occurred last year. Infections typically first develop near the bottom of the canopy closest to the soil where the fungal spores are first produced and then dispersed from.
Late leaf spot is most readily distinguished from other non-problematic spots (surfactant burn, herbicide, or physiological responses) by the presence of bumpy conidiophores on the underside of the late leaf spot lesion (pictures attached). The conidiophores are the location of spore production and can look fuzzy or textured. On brand new/infantile lesions or when conditions have been dry with low RH these may not always be noticeable. On the other hand, lesions resulting from several non-disease causes are typically smooth and often lighter in color. A small hand lens aids with visibility of the presence or absence of these structures. Scouting fields helps not only to ID potential issues early, but likewise helps inform management. Fields planted to peanut this year that are near fields where there were leaf spot management challenges last year (including fields rotated in split sections) can benefit from a 30 DAP fungicide application and/or including a systemic fungicide product in with the first application. Addition of a systemic product is likewise beneficial if rains or wet field conditions have delayed a fungicide application.
The following is an image of a spore associated with late leaf spot disease.
A microscopic image of the spores related to leaf spot disease.

Dan Anco

Extension Peanut Specialist and Associate Professor

Department of Plant and Environmental Sciences

Clemson University – Edisto Research and Education Center

64 Research Road

Blackville, SC 29817

630-207-4926 cell

danco@clemson.edu

share Share This Article