Injury From Paraquat and Thrips Peanut Notes No. 51 2018

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Avoid applying paraquat if peanut is expressing significant injury from thrips feeding. If terminals are blackened or much of the growth is expressing typical symptoms from thrips the combination of this injury and paraquat injury (even with Basagran as a safener) can reduce yields significantly. Injury from either of these stresses alone can reduce yield, generally a modest reduction, but when combined yield loss can exceed 500 pounds/acre. Apply acephate if thrips injury is observed at a level of 25% of leaves expressing symptoms (or more) as soon as possible. Allow plants to recover from thrips injury (look closely at new growth) and then apply herbicide.