The relation of pear psylla to pear decline … greenhouse tests

Jensen, D; Erwin, W

The relation of pear psylla to pear decline … greenhouse tests

Authors

D. D. Jensen
W. R. Erwin

Authors Affiliations

D. D. Jensen is Professor and Entomologist in the Experiment Station, University of California, Berkeley; W. R. Erwin is Laboratory Technician III, Department of Entomology, U.C., Berkeley.

Publication Information

Hilgardia 17(1):2-4. DOI:10.3733/ca.v017n01p2. January 1963.

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Abstract

Extensive research by U.C. entomologists, in both greenhouse and field test plots, on the relation of insects to the cause or spread of pear decline disease indicates that the pear psylla, Psylla pyricola Foerster, is the key to the problem.

Also in this issue:

Characters, distribution, and food plants of phlepsid leafhopper vectors of California aster-yellows virus

Orchard tests substantiate: Role of pear psylla in pear decline

Pear psylla: In abandoned orchards

Control of pear psylla: With oils and oil-pyrethrins

Phytotron modification: Admits more sunlight through plastic panels

Vetch green manure increases rice yields: …Proper depth and timing of incorporation allows maximum results

Granulated insecticides superior to sprays for: Alfalfa weevil control

Field maturity—seed yield—shatter loss for: Potomac orchardgrass and hardinggrass

Evidence of nonspecific transmission of California aster-yellows virus by leafhoppers