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Fertilizers which supply potassium to the soil increased the size of orange fruits during a long-term fertilizer experiment at Riverside.

Inbreeding can lead to increased uniformity within the inbred stock, increased prepotency in outcrosses, production of abnormal types, and symptoms of decline in vigor.

Irrigated pastures as a source of summer feed excel any forage crop, except possibly, alfalfa.

The codling moth is one of the most important pests of Payne walnuts.

The problem of spray residues on apricots has received considerable attention the past two seasons largely due to the necessity of applying control measures for codling moth. Without this control the grower and processor are confronted with heavy losses due to wormy fruit and if sprays are applied, there will be minimum amounts of the spray chemical in canned or dried fruit.

The annual rise and fall of populations of the Pacific mite—Tetranychus pacificus McG—and the Willamette mite— Tetranychus willamettei McG—on grapes has puzzled growers and entomologists for years. In the fall of 1949 the last explanatory link was supplied.

Nitrogen is the only fertilizer applied to a substantial acreage of deciduous fruit orchards in California. Usually the first limiting nutrient in the production of those orchards is nitrogen. Only a part of the total deciduous acreage has reached a level where response to nitrogen fertilizer is obtained.

Satisfactory control of the omnivorous leaf tier—Cnephasia longana—can be obtained with either DDT or dichlorodiphenyl dichlorethane when used at a rate of two pounds of the 50% wettable powder per 100 gallons of water.