Table beet seed crops are attacked regularly by the green peach aphid—Myzus persicae (Sulz.)—and by the bean aphid—Aphis fabae Scop. No definite knowledge about the kind and amount of damage to the seed crop caused by the aphids is available. Therefore growers usually apply aphicide sprays or dusts whenever the pests become obvious.

R. C. Dickson, Entomologist, University of California, Riverside; and Nurseryman John Campbell, University of California, Davis, assisted in the above reported studies.

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