Citricola scale control: Tests find parathion a control agent of outstanding promise in commercial navel and Valencia orange groves
AuthorsW. H. Ewart
H. S. Elmer
Authors AffiliationsW. H. Ewart is Assistant Entomologist, University of California College of Agriculture, Riverside; H. S. Elmer is Assistant Specialist in Entomology, University of California College of Agriculture, Riverside.
Hilgardia 5(10):7-14. DOI:10.3733/ca.v005n10p7a. October 1951.
Commercial navel and Valencia orange groves in the San Joaquin Valley were used in experimental applications of parathion for citricola scale control in field tests during the period from 1947 to 1950.
Also in this issue:Marketing channels studied: Marketing of fresh carrots, celery and asparagus in California studied to determine channels
Blood-spotting in eggs: Controlled by breeding in a ten-generation selection experiment with Single Comb White Leghorns
Lettuce growth rates: Investigations find heat unit accumulations not a reliable means of predicting harvest time
Invisible injury of citrus: Insecticide tests indicate that oil sprays lower soluble solids in juice and reduce dry matter in leaves
Lithium toxicity in citrus: Recognized on leaves in a grove in Santa Barbara County on the basis of artificially produced symptoms
Resistance to fumigation: Studies of outbreak in southern California reveal resistance to hydrogen cyanide fumigation persists
Westside dust test plots: Studies designed to develop plants and grazing systems for effective dust control under way in three counties
Research at field stations: Local agricultural problems are studied and fundamental research applied in distributed outdoor laboratories
Lemon fruit quality: Rootstocks affect juice content, soluble solids, acidity of Eurekas
Citrus-root nematodes on olive: Pest pathologically and morphologically similar to that on orange roots infests and reproduces on olive roots
Nontoxic ferns: Feeding tests with cattle find gold fern, bird's foot fern nontoxic
Swine production: Main factors of improvement are prolificacy, milk production, type
Growth and yield of certain Gramineae as influenced by reduction of photosynthetic tissue