Principal damage of green apple aphid

Also in this issue:

Cooperative buying for mass merchandising by retail grocery firms

Imported french parasite of walnut aphid established in California

Potentially serious cotton disease angular leaf spot established in California

Nitrogen fertilization of irrigated pastures to improve forage production capacity

Picking efficiency of cotton picker improved by unsynchronized speeds

Cattle feeding trials with acorns and oak leaves indicate need for supplementing dry range forage

Nutritional needs of fruit trees indicated by leaf analysis

Plant breeding of commercial peppers for disease resistance

New method for measuring movement of soil water

Seedless watermelons: In southern California

Mechanical grape harvest

Black-eyed peas as swine feed

Solvent seasoning of redwood

Elongation and bending of asparagus spears

Plastic covers for vegetable crop frost protection

Virus disease of the granulate cutworm

Fruit cartons in bulge test

Nematode control for deciduous fruit and nut trees

Study of diurnal changes in plant transpiration

Onion downy mildew