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  1. Biological control quarantine : needs and procedures : proceedings of a workshop /
    By: Coulson, Jack R., - Soper, Richard S. - Williams, David W. - United States. Agricultural Research Service.
    Publication info: [Washington, D.C.] :U.S. Dept. of Agriculture, Agricultural Research Service,[1991]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Agricultural pests  arthropod pests  Biological control  Biological pest control agents  Congresses  Insect pests  United States  Weeds  
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  2. Review of Bacillus thuringiensis var. kurstaki (Btk) for use in forest pest management programs of Ontario - with special emphasis on the aquatic environment /
    By: Surgeoner, Gordon A. - Farkas, Martha Judit, - Ontario. Aquatic Criteria Development Committee.
    Publication info: Guelph, Ont. :Dept. of Environmental Biology, University of Guelph,[1989].
    Holding Institution: Ontario Ministry of the Environment (
    Subjects: Bacillus (Bacteria)  Bacillus thuringiensis  Biological pest control agents  Biotechnology  
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