Walnut aphid investigations: Tests in northern California during the 1953 season stressed need for thorough treatment for control
AuthorsA. E. Michelbacher
Authors AffiliationsA. E. Michelbacher is Associate Professor of Entomology, University of California, Berkeley; Clarence Davis is Research Assistant in Entomology, University of California, Berkeley.
Hilgardia 8(7):4-4. DOI:10.3733/ca.v008n07p4. July 1954.
Systemic insecticides have been extensively investigated for control of the walnut aphid at Linden for the past two years and in the Walnut Creek, Yuba City, and San Jose areas during 1953.
Also in this issue:Markets for united states rice: Stable domestic market and increasing world supplies pose problem of export outlets and U. S. farm price
Fruit set in melon breeding: Hand pollination found to be less effective than pollination by honeybees in experiments at Davis
Parasites of sheep and deer: Mutual parasites of domestic sheep and Columbian black-tailed deer studied for transference factors
Root fumigation: Carrot and beet roots used in tests for nematode control
Artichoke plume moth damage: Large part of 1953–54 losses believed to be result of inadequate sanitation and cultural practices
Drought survival of ponderosa: Pine seedlings treated with simulated dew survive by month nontreated controls in greenhouse tests
Alkali soil reclamation tests: Experiments in Tulelake Basin show encouraging improvements in soil after treatment with gypsum
Sulfur in fertilizer programs: Long-term studies of influence of sulfur on navel orange production indicate no improvement in yield
Valencia orange fruit size: Affected by the relation of calcium to magnesium as demonstrated by tests with nutrient solutions
Control of cutworms on citrus: Infestations of pest in certain areas of southern California in May 1954 controlled by spray treatment
The inheritance of resistance to rust in the snapdragon
Thrips resistance in the onion