Yazar
f m webster
29 cilt bulundu.
F. M. Webster · U.S. Dept. of Agriculture, Bureau of Entomology
13 sayfa · 1907
Agricultural pests / Corn root-aphis / Aphis / Corn / Aphids
F. M. Webster · U.S. Dept. of Agriculture, Division of Entomology
62 sayfa · 1903
Plant pests / Plant health / Arthropod pests / Grain / Diseases and pests
F. M. Webster · U.S. Dept. of Agriculture, Bureau of Entomology
Sayfa sayısı yok · 1907
Greenbug / Agricultural pests / Grain / Diseases and pests
F. M. Webster · U.S. Dept. of Agriculture, Office of the Secretary
Sayfa sayısı yok · 1916
Grain-louse
F. M. Webster · U.S. Dept. of Agriculture, Bureau of Entomology
Sayfa sayısı yok · 1906
Corn / Seeds / Diseases and pests / Agricultural pests
F. M. Webster · Ohio Agricultural Experiment Station
95 sayfa · 1895
Grape-vine root-worm / Grapes / Diseases and pests / Ohio Agricultural Experiment Station
F. M. Webster · Ohio Agricultural Experiment Station
217 sayfa · 1893
Diseases and pests / Raspberries / Blackberries
F. M. Webster · Illinois State Laboratory of Natural History
25 sayfa · 1904
Diptera / Neocerata rhodophaga