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canada united states spruce budworms program
2 cilt bulundu.
Cilt sonuçları
International directory
Canada/United States Spruce Budworms Program · Canusa, Canada United States Spruce Budworms Program
Sayfa sayısı yok · 1984
Spruce budworm / Control / Directories
Guidelines for the operational use of Bacillus thuringiensis against the spruce budworm
Oswald N. Morris, John B. Dimond, Franklin B. Lewis, United States. Cooperative State Research Service, Canada/United States Spruce Budworms Program · U.S. Dept. of Agriculture, Forest Service, Cooperative State Research Service
26 sayfa · 1984
Spruce budworm / Control / Bacillus thuringiensis / Aerial spraying and dusting in forestry