Yazar
geddes w simpson
3 cilt bulundu.
Cilt sonuçları
Seasonal history of the buckthorn aphid and suitability of alder-leaved buckthorn as a primary host in northeastern Maine
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
Survey of internal parasites of potato-infesting aphids in Northeastern Maine, 1963 through 1969
Wayland Arthur Shands, Geddes W. Simpson, Corinne C. Gordon · University of Maine
15 sayfa · 1972
Aphids / Control / Potatoes / Diseases and pests
Effects of cultural methods for controlling aphids on potatoes in northeastern Maine
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