Addressing Yellow Peanuts Peanut Notes No. 109 2019

— Written By
en 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.

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 ▲

Yellow peanuts this time of year could be caused by nitrogen deficiency as a result for poor nodulation, from a manganese deficiency or from water-logged areas of fields. Yellow peanuts from little to no nodulation will improve only by adding sufficient nitrogen. This issue generally occurs in newground fields are fields where peanuts have not been grown for many years. Apply 500 pounds/acre of ammonium sulfate as soon as possible to correct this issue. This is expensive but necessary if a true nitrogen deficiency caused by poor nodulation exists. If manganese deficiency is present a foliar application of manganese will correct this issue. If peanuts are yellow due to water-logged soils, the only way they will improve is by drying of soil. In my experience when soil begins to dry peanut foliage will become green as N fixation begins under favorable conditions. See chapter 3 in 2019 Peanut Information for more details on these issues. Timely application of ammonium sulfate or manganese (when needed) will resolve the issue more effectively than delays in application. Ammonium sulfate is expensive, so make sure nodulation is the issue before applying this fertilizer. A nitrogen-deficient peanut requires as much N as a corn crop. Certainly, biological nitrogen fixation is the least expensive way to provide this to peanut (a legume that fixes its own N) but at this point if nodulation is inadequate a substantial amount of applied N is needed to correct the deficiency. Correcting a manganese deficiency is much less expensive, but make sure the product applied provides adequate manganese and is cost effective.