Soft scales infesting walnut: Chemical control required when natural mortality factors are disturbed by treatments directed against other insect pests
AuthorsA. E. Michelbacher
Howard L. McKenzie
C. Q. Gonzales
Authors AffiliationsA. E. Michelbacher is Professor of Entomology, University of California, Berkeley; Howard L. McKenzie is Associate Entomologist, University of California, Davis; C. Q. Gonzales is Research Assistant in Entomology, University of California, Berkeley.
Hilgardia 13(5):6-6. DOI:10.3733/ca.v013n05p6. May 1959.
Four species of soft scales–a complex of two species of frosted scale, European fruit lecanium, and the calico scale– can inflict serious damage on walnuts unless controlled, either by natural factors or through the use of insecticides.
Also in this issue:Cotton price and production: Long term gains for California cotton growers depend on competitive pricing and growth of domestic, export markets
Commercial cut flower industry: Expansion of merchandising outlets for floral products needed to balance increased output capacity of growers
Sugar-beet nematode activity: Yields increased by early planting in sugar-beet nematode infested fields in date-of-planting tests in Monterey County
Polyethylene over strawberries: Strawberry bed covers markedly influence soil temperature and earliness of fruit in Orange and San Diego county tests
Plantclimates of California: Zones of similar plant responses and their possible interpretation by effective day-night temperatures
Chemicals on weeds in onions: Selective herbicides tested for economical control of common broad-leaved weeds and for effects on commercial onion crop
Developmental anatomy of the fleshy storage organ of Daucus carota
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Comparative histogenesis of vegetative and floral apices in Amygdalus communis, with special reference to the carpel