Woolly and green apple aphids: Field trials with new materials in orchard near Watsonville indicate same timing of spray treatment controls both pests
AuthorsHarold F. Madsen
J. Blair Bailey
Authors AffiliationsHarold F. Madsen is Assistant Entomologist, University of California, Berkeley; J. Blair Bailey is Research Assistant in Entomology, University of California, Berkeley.
Hilgardia 12(3):14-16. DOI:10.3733/ca.v012n03p14. March 1958.
Woolly apple aphid and green apple aphid are two of the more important pests of apple, especially in the coastal districts of northern California. Both are difficult to control because they are able to reinfest trees after spray applications.
Also in this issue:Changes in orange marketing: Developing revolution in marketing and distribution of the nation's food products affects fresh and processed oranges
Citrus trees in water cultures: Information derived from studies using nutrient solutions as tools of research is of inestimable value to citrus industry
Effect of nontillage of navels: Relation of some tillage practices to water infiltration, yield, and quality of oranges part of fertilizer experiment
Splitting of Navel oranges: Studies indicate local temperature and humidity more closely related to incidence of injury than is soil moisture content
Albinism in citrus seedlings: Nongenetic absence or deficiency of chlorophyll in seedlings prevented by treating freshly extracted seeds with fungicide
Iron and zinc foliage sprays: Radioactive tracers being used in basic studies on factors influencing absorption and translocation of micronutrients
Chlorine absorption: All portions of citrus trees grown in soil cultures absorbed chlorine in test
Red mite on citrus: Timing control treatments important and influenced by climate of growing areas
Grocery store credit service: Combinations of credit with telephone and delivery services are related to the locations, ownership and sizes of stores
Toxicity studies with arsenic in eighty California soils
Arsenic fixation in relation to the sterilization of soils with sodium arsenite
Toxicity studies with sodium chlorate in eighty California soils