Yazar
richard s soper
6 cilt bulundu.
Cilt sonuçları
Cotton-integrated pest management
Richard S. Soper, N. A. Filippov, S. N. Alimukhamedov · Yayınevi bilinmiyor
160 sayfa · 1992
Control / Cotton / Insect pests / Congresses / Diseases and pests
Biological control quarantine
Jack R. Coulson, Richard S. Soper, Williams, David W. · U.S. Dept. of Agriculture, Agricultural Research Service
336 sayfa · 1991
Agricultural pests / Congresses / Biological control / Biological pest control agents / Weeds
Production of entomophthora resting spores for biological control of aphids
Richard S. Soper · Yayınevi bilinmiyor
Sayfa sayısı yok · 1975
Aphids / Biological control / Entomopathogenic fungi