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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:: Frenkel, Robert E. and Eilers, H. Peter
Abstract:: "A pilot study conducted for the Environmental Protection Agency." "Based on field work conducted during the months of July and August 1976, the following report describes the characteristics of vegetation at the upper limit of intertidal wetland in five Oregon coastal marshes and relates vegetation characteristics to marsh zonation, elevations...
Resource Type:: Technical Report
Full Text:: PROTECTION AGENCY BY ROBERT E. FRENKEL, PRINCIPAL INVESTIGATOR AND H. PETER EILERS, ASSOCIATE

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:: --------------------------------------------------------------------------------------------- 20 AUTHORS: P. H. Westigard is an associate professor of entomology at the Southern Oregon

Creator:: Morrison, Peter H. and Swanson, Frederick J.
Abstract:: Fire history from years 1150 to 1985 was reconstructed by analyzing forest stands in two 1940-hectare areas in the central-western Cascade Range of Oregon. Serving as records for major fire episodes, these stands revealed a highly variable fire regime. The steeper, more dissected, lower elevation Cook-Quentin study area experienced more...
Resource Type:: Technical Report

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:: ANNUl\L REPORT OF RESEARCH IN ENTONDLOGY Peter H. Westigard, Professor of EntomoTogy PhiT VanBuskirk

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:: Flexner, Brian Croft, Peter H. Westigard. 2. Twospotted Spider Mite: Control with various formulations of

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:: Spider Mite: Dispersal from orchard groundcover and influence on levels of organotin resistance. Peter

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:: Peter H. Westigard, Prof. Entomology z. f‘1‘ o*§iQ,' ‘\~ §_ ~* if§ *1»4-I‘ 11".~ »~§ *5

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

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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