Peanuts

Hophornbeam copperleaf has become an increasing problem in agricultural fields throughout Georgia. It can occur at densities that have the potential to reduce yields and influence harvest efficiency. Hophornbeam copperleaf is also known as three-seeded mercury.

Grazon® P+D (picloram + 2,4-D) injury, diagnosed as leaf roll, is occasionally observed in Georgia peanut fields due to the presence of contaminated soil, forage, animal waste (manure/urine), and/or irrigation water. Since peanut plants are very tolerant of low levels of 2,4-D, the primary cause of these leaf roll symptoms is picloram. When this injury occurs, growers are often concerned about how it can potentially influence final peanut yield.

This publication provides growers, county agents, crop consultants, etc. with information regarding peanut yield response to 2,4-D injury.

Liberty® (glufosinate-ammonium) has become a popular postemergence herbicide in Georgia due to its ability to control herbicide-resistant Palmer amaranth when applied in a timely manner. However, the popularity of Liberty®-resistant cultivars (e.g., Liberty-Link® and WideStrike®) has led to an increased potential for off-target movement and sprayer contamination of Liberty® to sensitive crops such as peanut. This publication describes symptoms of peanuts exposed to Liberty.

The objective of this publication is to provide county agents, peanut growers, crop consultants, agri-business personnel, etc. with information that can assist them in making appropriate management decisions after a suspected dicamba drift/volatilization or sprayer contamination problem has occurred.