Oak pit scales: Control possible with emulsion-type foliage oil and toxaphene spray
AuthorsA. Earl Pritchard
Robert E. Beer
Authors AffiliationsA. Earl Pritchard is Assistant Professor Division of Entomology and Parasitology and Assistant Entomologist in the Experiment Station, Berkeley; Robert E. Beer was Research Assistant Division of Entomology and Parasitology in the Experiment Station, Berkeley, when these studies were conducted.
Hilgardia 4(4):9-14. DOI:10.3733/ca.v004n04p9. April 1950.
Oak pit scales are serious pests of oak trees in California. Terminal growth, branches, and smaller trees are often killed as a result of the feeding scales, and large trees may be weakened seriously. Experimental work indicates that oak pit scales may be controlled.
Also in this issue:Dairy cow replacements: About 90% of Los Angeles County in-shipments in 1949 came from areas other than the milkshed
Peaches for warm climates: New varieties are solving problem of insufficient winter chilling in southern California orchards
Increasing olive fruit sizes: Thinning important in lifting fruit from substandard grade into canning quality
2,4-D and citrus fruit sizes: Increase of citrus fruit size primarily due to accelerated growth rate from spray treatment
Male-sterile tomatoes: Unfruitful mutants offer several advantages for the production of hybrid seed
The redwoods of California: Conservation of Sequoias possible through seedling maintenance and proper cutting practices
Ripe fruit rot in tomatoes: Early maturity of fruit and harvest before fall rains are factors in reducing loss
Potato scab control: Applications of sulfur to increase soil acidity effective in reducing disease in experiments in Kern County
Sweet corn: Growth and yield affected by irrigation in semiarid areas
Egg washing field trials: Studies indicate clean unwashed eggs are most suitable for satisfactory storage
Root development and soil moisture