Yazar
Jack H Barger
4 cilt bulundu.
Cilt sonuçları
Elm leaf beetle performance on ozone-fumigated elm
Jack H. Barger · United States Department of Agriculture, Forest Service, Northeastern Forest Experiment Station
Sayfa sayısı yok · 1992
Elm leaf-beetle / Elm / Diseases and pests
Field test with helicopter applications of Gardona against gypsy moth in Pennsylvania
Jack H. Barger · Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station
Sayfa sayısı yok · 1975
Control / Gypsy moth / Aerial spraying and dusting in forestry
Improved sanitation practice for control of Dutch elm disease
Jack H Barger · Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station
Sayfa sayısı yok · 1977
Dutch elm disease / Sanitation
Dutch elm disease and methoxychlor
Jack H Barger · U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station
Sayfa sayısı yok · 1976
Dutch elm disease