Yazar
charles f speers
6 cilt bulundu.
Cilt sonuçları
White grubs in forest tree nurseries and plantations
Charles F. Speers · U.S. Dept. of Agriculture, Forest Service
Sayfa sayısı yok · 1961
Phyllophaga / Seedlings / Diseases and pests
Pales and pitcheating weevils
Charles F. Speers · U.S. Dept. of Agriculture, Forest Service, Southeastern Forest Experiment Station
Sayfa sayısı yok · 1971
Beetles / Pine / Diseases and pests
Experimental planting in cutover spruce-fir in the southern appalachians
Charles F. Speers · Southeastern Forest Experiment Station, U.S. Dept. of Agriculture
Sayfa sayısı yok · 1975
Kategori yok
The pine spittle bug (Aphrophora parallela Say)
Charles F. Speers · New York State College of Forestry
65 sayfa · 1941
Pine spittle bug / Pine / Diseases and pests
How to prevent weevil damage to pine seedlings in the South
Charles F. Speers · U.S. Dept. of Agriculture, Forest Service, Southeastern Forest Experiment Station
11 sayfa · 1974
Control / Beetles / Pine / Diseases and pests