Damage to seed crops by lygus bugs—Lygus hesperas Knight—has occurred in alfalfa, beans and other legumes, carrots and other umbelliferous seed plants, and in sugar beets. The damage may be plant deformation, die-back, and reduction of seed yield and seed viability. Degree of damage varies considerably depending on type of damage, the crop involved, and the numbers of bugs.

John Campbell, Nurseryman, University of California, Davis, assisted in the experiments reported.

The above progress report is based on Research Project No. 1565.