Boom and broadcast sprayers: Comparative field and laboratory study of spray distribution as applied by two types of sprayers on spotted alfalfa aphid
AuthorsJack E. Dibble
R. G. Curley
N. B. Akesson
Authors AffiliationsJack E. Dibble is Extension Field Technologist in Entomology, University of California, Berkeley; R. G. Curley is Extension Specialist in Agricultural Engineering, University of California, Davis; N. B. Akesson is Associate Professor of Agricultural Engineering, University of California. Davis.
Hilgardia 12(1):6-10. DOI:10.3733/ca.v012n01p6. January 1958.
At approximately the same time that maximum control of the spotted alfalfa aphid—Therioaphis maculata (Buckton)—became of great importance, a new boomless sprayer for broadcasting insecticides became popular in some areas.
Also in this issue:The toxic effect of certain chemical solutions on spores of Penicillium italicum and P. digitatum
Problems of water districts: Economic merit and feasibility are important considerations in justifying the construction of proposed district projects
Rosy apple aphid control tests: Dormant oil plus phosphate compounds applied to control the overwintering eggs more efficient than spring foliage sprays
New control for alfalfa aphid: Systemic insecticide protects insect enemies of aphid, allows compatibility of chemical treatment with biological control
Plastic shelters for new lambs: Protection from weather during first few days after birth reduced losses in tests during January-March lambing season
Nitrogen-fixation by deerbrush: Greenhouse experiments suggest deerbrush has root nodules like leguminous plants with nitrogen-fixing properties
Aureomycin in livestock feed: Antibiotic in form of a prepared alfalfa-base pellet added to ration in feeding trials with weaner calves and yearlings
Solana strawberry: New variety yields fruit of high quality in southern California trial plantings
Retail grocery store services: Types of telephone ordering and of delivery services offered customers shown to be influenced by characteristics of store
Leaf-scar infection in relation to the olive-knot disease
Charcoal rot of sugar beet