Browsing by Author "Weidhaas, John A., Jr."
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- Control of insects and weeds in Christmas tree plantationsWeidhaas, John A., Jr. (Virginia Cooperative Extension Service, 1981-01)
- Control of insects, diseases, and weeds in Christmas tree plantationsWeidhaas, John A., Jr. (Virginia Cooperative Extension Service, 1980-01)
- Disease, insect, and weed control recommendations for commercial production and maintenance of trees and shrubsStipes, R. Jay; Weidhaas, John A., Jr.; Coartney, James S. (Virginia Cooperative Extension Service, 1977-01)
- Insect control for commercial greenhouse and floral cropsWeidhaas, John A., Jr.; Schultz, Peter B.; Lindstrom, Richard S. (Virginia Cooperative Extension Service, 1981-01)Relatively few kinds of insects and related pests occur on greenhouse and floral crops, but they attack a wide range of plants and can be highly destructive. Many insecticide and miticide formulations are available to growers, but specific uses may be quite limited for any one and plants vary greatly in susceptibility to chemical injury. Your local Extension Agent may be able to help you or obtain the technical information you need.
- Insect Identification Laboratory Annual Report 1984Hilburn, Daniel J.; Ravlin, F. William; Weidhaas, John A., Jr. (Virginia Tech, 1984)This report summarizes the activity of the Insect Identification Laboratory at Virginia Tech for 1984.
- Insect Identification Laboratory Annual Report 1985Hilburn, Daniel J.; Ravlin, F. William; Weidhaas, John A., Jr. (Virginia Tech, 1985)This report summarizes the activity of the Insect Identification Laboratory at Virginia Tech for 1985.
- Insect Identification Laboratory Annual Report 1986Day, Eric R.; Ravlin, F. William; Weidhaas, John A., Jr.; Rutherford, Susan L. (Virginia Tech, 1986)This report summarizes the activity of the Insect Identification Laboratory at Virginia Tech for 1986.
- Insect Identification Laboratory Annual Report 1987Day, Eric R.; Ravlin, F. William; Weidhaas, John A., Jr.; Rutherford, Susan L. (Virginia Tech, 1988)This report summarizes the activity of the Insect Identification Laboratory at Virginia Tech for 1987.
- Insect Identification Laboratory Annual Report 1988Day, Eric R.; Ravlin, F. William; Weidhaas, John A., Jr.; Rutherford, Susan L. (Virginia Tech, 1989)This report summarizes the activity of the Insect Identification Laboratory at Virginia Tech for 1988.
- Insect Identification Laboratory Annual Report 1989Day, Eric R.; Ravlin, F. William; Weidhaas, John A., Jr.; Rutherford, Susan L. (Virginia Tech, 1990)This report summarizes the activity of the Insect Identification Laboratory at Virginia Tech for 1989.
- Pest management guide for ornamental plants in the home groundsWeidhaas, John A., Jr. (Virginia Cooperative Extension Service, 1981-01)