Control of the frosted scale: Tests in southern California indicate parathion sprays effective treatment against pest on walnut
AuthorJ. C. Ortega
Author AffiliationsJ. C. Ortega is Associate Specialist in Entomology, University of California, Riverside.
Hilgardia 8(1):10-10. DOI:10.3733/ca.v008n01p10. January 1954.
The frosted scale–Leeanium pruninosum Coq.–is a large, convex black scale about 5/16” long and is covered with a frostlike wax. The eggs are oval and pearly white when first laid, but as they develop under the female scale they turn darker. When ready to hatch they are pale brown in color. The hatch starts early in May and continues into July or–in some areas–into August.
Also in this issue:Some properties of the curly-top virus
Alfalfa hay profit expectation: Shifts in land-use pattern resulting from cotton acreage allotments influenced by price expectation
Salt concentrate mixtures: Consumption of self-fed supplemental feed mixtures can maintain range animals on good nutrient level
Imperial valley lamb feeding: Data on rates of gain per month and per acre obtained in winter season feeding trials on alfalfa pasture
Heating poultry drinking water: Electrically heating poultry watering systems by different methods tested for economy of operation
Blackberries resistant to wilt: Certain varieties of the trailing berry resistant to Verticillium wilt may be grown in infested soil
Poinsettia bud initiation dates: Study of bud initiation dates enables growers to produce and time better poinsettia flowers
Oxidation of sulfur in soils: Nitrogen losses during oxidation may cause temporary setback to plants following applications of sulfur
Infiltration rates: Effect of wetting agents in water on infiltration rates into soils
Brassica-root nematode here: Pest formerly unknown in the United States found to be established in fields in Half Moon Bay area
Seasonal use of dairy products: Studies of Sacramento families showed how uses of dairy products varied with season