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Creator:: Westigard, Peter H., Lombard, P. B. (Porter B.), and Berry, Donald W.
Abstract:: Published November 1967. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: ------------------------------------------------------------------------------------ 31 AUTHORS: Peter Westigard is an associate professor of entomology and Porter Lombard is an

Creator:: Westigard, Peter H., Lombard, P. B. (Porter B.), and Berry, Donald W.
Abstract:: This publication deals with the development of integrated pest management of insect and mite species that attack pears in southern Oregon. Since about 1900, when the pear industry became firmly established in this area, losses from arthropod pests have been an important and occasionally limiting factor to the continuous production...
Resource Type:: Technical Report
Full Text:: Oregon Peter H. Westigard, Porter B. Lombard, and Donald W Berry Introduction This publication deals

Creator:: Willett, Mike and Westigard, Peter H.
Abstract:: Petroleum oils have been used to suppress insect and mite pests for 100 years. Beginning in the 1880's, when kerosene was first used to control scale and aphids, to the present use of highly refined petroleum derivatives, these products have provided growers with a unique tool in their battle against...
Resource Type:: Technical Report
Full Text:: Peter H. Westigard, professor of entomol- ogy, Southern Oregon Experiment Station, Oregon State

Creator:: Westigard, Peter H. and Zwick, Robert Ward, 1922-
Abstract:: Since its discovery in Oregon in 1946, the pear psylla, Psylla pyricola Forster, has become the most serious insect pest of pear. Damage to pear trees include the transmission of pear decline disease which has caused losses of trees, injection of a phytotoxic toxin resulting in tree shock and injury,...
Resource Type:: Technical Report
Full Text:: , Oregon (photo courtesy C. B. Cords) TH IS P UB LIC AT IO N IS O UT O F D AT E. Fo r m os

Creator:: Westigard, Peter H., Southern Oregon Agricultural Experiment Station, and Oregon State University. Agricultural Experiment Station
Abstract:: This report includes information concerning experimental use of unregistered pesticides or unregistered uses of pesticides. Experimental results should not be interpreted as recommendations for use. Use of unregistered materials or use of any registered pesticides inconsistent with its label is against both Federal Law and State Law.
Resource Type:: Technical Report
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Creator:: Westigard, Peter H., Southern Oregon Agricultural Experiment Station, and Oregon State University. Agricultural Experiment Station
Abstract:: This report includes information concerning experimental use of unregistered pesticides or unregistered uses of pesticides. Experimental results should not be interpreted as recommendations for use. Use of unregistered materials or use of any registered pesticides inconsistent with its label is against both Federal Law and State Law.
Resource Type:: Technical Report
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Creator:: Westigard, Peter H., VanBuskirk, Philip, Southern Oregon Agricultural Experiment Station, and Oregon State University. Agricultural Experiment Station
Abstract:: This report includes information concerning experimental use of unregistered pesticides or unregistered uses of pesticides. Experimental results should not be interpreted as recommendations for use. Use of unregistered materials or use of any registered pesticides inconsistent with its label is against both Federal Law and State Law.
Resource Type:: Technical Report
Full Text:: . . . . . . . . . . . .. 38 O; \w, ROGUE VALLEY TEMPERATURES AND PRECLPITATION 198511' 1‘ 1 *;_"b >22” 2:. J __ : ___ _ r

Creator:: Westigard, Peter H., Southern Oregon Agricultural Experiment Station, and Oregon State University. Agricultural Experiment Station
Abstract:: This report includes information concerning experimental use of unregistered pesticides or unregistered uses of pesticides. Experimental results should not be interpreted as recommendations for use. Use of unregistered materials or use of any registered pesticides inconsistent with its label is against both Federal Law and State Law.
Resource Type:: Technical Report
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Creator:: Westigard, Peter H., Southern Oregon Agricultural Experiment Station, and Oregon State University. Agricultural Experiment Station
Abstract:: This report includes information concerning experimental use of unregistered pesticides or unregistered uses of pesticides. Experimental results should not be interpreted as recommendations for use. Use of unregistered materials or use of any registered pesticides inconsistent with its label is against both Federal Law and State Law.
Resource Type:: Technical Report
Full Text:: mite . . . . . . . . . . . . . . . . . 0 3, Pear psylla 5» Codling moth O . . . . . . . . 0 0

Creator:: Westigard, Peter H., Southern Oregon Agricultural Experiment Station, and Oregon State University. Agricultural Experiment Station
Abstract:: This report includes information concerning experimental use of unregistered pesticides or unregistered uses of pesticides. Experimental results should not be interpreted as recommendations for use. Use of unregistered materials or use of any registered pesticides inconsistent with its label is against both Federal Law and State Law.
Resource Type:: Technical Report
Full Text:: . . . . . . . . . . l2 2. Possible resistance to pyrethrolds o) field test. . . . . . . . . . . . l3 b) laboratory test

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