HPPD Injury

scouted Aug. 25, 2023

Soybeans were scouted at the R2 growth stage and stunted growth, interveinal chlorosis, and yellowing of leaves were observed in about 8 rows of this field.
This issue was confirmed by an NC State Extension Specialist as 4-hydroxyphenylpyruvate dioxygenase (HPPD)-inhibiting herbicide injury. HPPD comes from the herbicide group 27. These herbicides are commonly referred to as the ‘bleacher’ herbicides. Due to the fact that the HPPD-inhibiting herbicides hinder plant pigment synthesis, which results in chlorosis and/or bleaching of vegetative tissue. Injury to soybeans can occur from physical drift or carryover from previous growing seasons. Injury can be avoided by following the label of the pesticide you are applying.

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