Survey of herbicide and fungicide use in peanut in North Carolina and Virginia in the United States

Abstract

Plain Language SummaryDiseases and weeds can reduce yield of peanut if effective control measures including fungicides and herbicides are not used. A survey of 76 farmers in North Carolina and Virginia at Cooperative Extension Service meetings was completed relative to fungicide and herbicide use in 2021. Eighty‐two percent of farmers made between three and five herbicide applications while sixty‐eight percent of farmers made between four and five fungicide applications. 2,4‐DB was the herbicide applied most frequently. The fungicide chlorothalonil was applied the most often. Pydiflumetofen was applied by 61% of farmers. Results from this survey can be used to inform regulatory agencies on use pesticide patterns by defining the relative importance of individual or groups of pesticides currently using to suppress pests and prevent or mitigate associated economic losses.This article is protected by copyright. All rights reserved

Suppression of Leaf Spot Disease in Peanut (Arachis hypogaea) with Chlorothalonil, Copper Salts of Fatty Acid Rosins, and Microionized Sulfur

“…This fungicide has been used to protect peanut from leaf spot disease since its introduction more than 50 years ago. Chlorothalonil is the most frequently applied fungicide in peanut in North Carolina and Virginia [6] because of expense and management of resistance [2]. Chlorothalonil is often applied as the first and last sprays in a 5-spray program for resistance management [2,6].…”

“…Chlorothalonil is the most frequently applied fungicide in peanut in North Carolina and Virginia [6] because of expense and management of resistance [2]. Chlorothalonil is often applied as the first and last sprays in a 5-spray program for resistance management [2,6]. However, this fungicide does not protect peanut from southern stem rot disease [2].…”

“…For example, tebuconazole is no longer effective in protecting peanut from leaf spot disease but continues to provide protection from southern stem rot [2]. Co-application of chlorothalonil and tebuconazole is relatively common in fungicide programs in peanut in North Carolina [6]. Sulfur, a multi-site inhibiting fungicide [5], can be used to suppress pathogens including the causal pathogen for late leaf spot disease [2].…”