Yazar
e r van leeuwen
7 cilt bulundu.
Cilt sonuçları
Silicated pyrethrum soap from coconut oil
E. R. Van Leeuwen · U.S. Dept. of Agriculture
Sayfa sayısı yok · 1934
Soap / Formulas, recipes / Coconut oil / Pyrethrum (Insecticide)
Reactions of the Japanese beetle to spray deposits on foliage
E. R. Van Leeuwen · U.S. Dept. of Agriculture
19 sayfa · 1932
Control / Lead arsenate / Japanese beetle
Control of the Japanese beetle on fruit and shade trees
E. R. Van Leeuwen · U.S. Dept. of Agriculture
14 sayfa · 1932
Control / Fruit / Japanese beetle / Trees / Diseases and pests
Molecular Diagnostics : Part 2
E. van Pelt-Verkuil, W.B. van Leeuwen, R. te Witt · Springer
248 sayfa · 2017
Food adulteration and inspection
Life history of the codling moth in northern Georgia
E. R. Van Leeuwen · U.S. Dept. of Agriculture
95 sayfa · 1929
Codling moth / Fruit / Diseases and pests