Yazar
Wayland Arthur Shands
8 cilt bulundu.
Wayland Arthur Shands · For sale by the Supt. of Docs., U.S. Govt. Print. Off.
16 sayfa · 1969
Application / Diseases and pests / Economic Entomology / Entomology, Economic / Insecticides
Wayland Arthur Shands · Agricultural Research Service, U.S. Dept. of Agriculture
61 sayfa · 1964
Potatoes / Insect pests / Biological control / Diseases and pests
Wayland Arthur Shands · Life Sciences and Agriculture Experiment Station, University of Maine at Orono
40 sayfa · 1972
Potato mosaic virus / Aphids
Wayland Arthur Shands · Life Sciences and Agriculture Experiment Station, University of Maine at Orono
32 sayfa · 1972
Aphids / Biological control / Pathogenic fungi
Wayland Arthur Shands, Geddes W. Simpson · Life Sciences and Agriculture Experiment Station, University of Maine at Orono
24 sayfa · 1971
Plant-lice / Aphis / Food / Buckthorns / Diseases and pests
Wayland Arthur Shands, Geddes W. Simpson, H. J. Murphy · Life Sciences and Agriculture Experiment Station, University of Maine at Orono
31 sayfa · 1972
Potato mosaic virus / Aphids / Control
Wayland Arthur Shands, Geddes W. Simpson, Corinne C. Gordon · University of Maine
15 sayfa · 1972
Aphids / Control / Potatoes / Diseases and pests