Purple scale control: Imported parasites give promise of ultimate biological control

Also in this issue:

Cotton acreage adjustment: Major changes in San Joaquin Valley land use pattern in prospect for cotton areas in 1954

Marketing of hops analyzed: Influence of the control program on the hop marketing situation in California studied

Almond harvesting: Mechanization promising in reducing harvesting costs

New almond variety released: A good pollinizer for Nonpareil with good nut quality, tree growth, yield, available for general propagation

Walnuts in Southern California: Control of codling moth by treatment with new materials evaluated during 1952 season

Fertilizer sources for cotton: Fertilizer materials supplying nitrogen and phosphate tested for crop producing efficiency

Migrating aphids on walnuts: Regimentation of aphid-free orchards a constant threat from infested orchards on windward side

Vinegar fly in tomato fields: Series of experimental tests indicates solution of control problem may be in field treatments

Oriental fruit fly studies: Mass culture of natural enemies of destructive fly possible after two years of laboratory research

Orchard plow-pans: Obstacle to root distribution and water penetration can be reduced

Commercially grown carnations: Studies in soil fertility control made to determine optimum fertilization for production of ornamentals

Spinach at retail: Study of fresh packaged and bulk spinach compared quality and price

Vaccination of swine against tuberculosis with Calmette-Guérin culture, BCG