Virginia Polytechnic Institute and State University. Extension Division2019-02-272019-02-271979-01http://hdl.handle.net/10919/88013314 pagesapplication/pdfen-USVirginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University.LD5655.A762 1979zkInsect pests -- Control -- VirginiaPlant diseases -- Control -- VirginiaWeeds -- Control -- VirginiaExtension publication