Serpentine leaf miner damage: Spinach losses in 1956 recall cyclic attacks by pests and need of both insecticides and natural enemies for control
AuthorsW. H. Lange
A. A. Grigarick
E. C. Carlson
Authors AffiliationsW. H. Lange is Associate Professor of Entomology, University of California, Davis; A. A. Grigarick is Senior Laboratory Technician, Entomology, University of California, Davis; E. C. Carlson is Associate Specialist in Entomology, University of California, Davis.
Hilgardia 11(3):3-5. DOI:10.3733/ca.v011n03p3. March 1957.
A small leaf-mining agromyzid fly of omnivorous tastes—Liriomyza langei Frick—caused a 50% loss to fall spinach in the Salinas Valley in 1956. The unofficial allowable tolerance for larvae could not be met in many instances with as many as six weekly applications of combination phosphate and chlorinated hydrocarbon insecticides at a total cost of $60 an acre.
Also in this issue:Use of marketing contracts: Farmer cooperatives in California usually require contracts with members to effectively integrate marketing operations
New carnation pests: Bud mite and leaf miner found in California may cause serious problems
New materials for codling moth: New compounds evaluated for control of codling moth should resistance to DDT be developed by the pest in California
Soft scales on walnut in 1956: Increase in soft scale populations on walnuts in northern California effected by several factors in complex problem
Smog reduces seedling growth: Zutano avocado seedling growth affected by synthetic smog of ozone and hexene vapor in fumigation chamber experiment
Tree nutrient sprays: Results of foliar sprays to supplement deficiencies affected by fruit variety
Soil profiles identify series: Basic soil surveys establish classifying characteristics and indicate selection of most efficient agricultural use
Soil sterilized by irradiation: Sterilization of soil by exposure to an electron beam offers new tool for research on chemistry and microbiology of soil
New Satsuma mandarin strains: Fruit of nucellar lines of mandarin-orange color earlier and have higher per cent of soluble solids than the parent line
The biology of the garden centipede, Scutigerella immaculata