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l h worthley
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Cilt sonuçları
Solid-stream spraying against the gipsy moth and the brown-tail moth in New England
L. H. Worthley · U.S. Dept. of Agriculture
16 sayfa · 1917
Gypsy moth / Control / Browntail moth / Spraying and dusting in agriculture
The European corn borer and its control
D. J. Caffrey, L. H. Worthley · U.S. Dept. of Agriculture
45 sayfa · 1922
European corn borer / Control / Corn / Diseases and pests
The European corn borer
D. J. Caffrey, L. H. Worthley · U.S. Dept. of Agriculture
48 sayfa · 1927
European corn borer / Control