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lorna c youngs
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Cilt sonuçları
Aphids in apples
Lorna C. Youngs · Cooperative Extension, Washington State University
Sayfa sayısı yok · 1982
Aphids / Apples / Control / Diseases and pests / Woolly apple aphid
The pine butterfly
Lorna C. Youngs · Cooperative Extension Service, College of Agriculture, Washington State University
Sayfa sayısı yok · 1979
Pine butterfly
San Jose scale
Lorna C. Youngs · Cooperative Extension, College of Agriculture, Washington State University
Sayfa sayısı yok · 1980
Kategori yok
Varroa mite
Lorna C. Youngs · Cooperative Extension Service, College of Agriculture, Washington State University
Sayfa sayısı yok · 1980
Varroa jacobsoni / Honeybee / Parasites
Removing bees from buildings
Lorna C. Youngs · Extension Service, Oregon State University
Sayfa sayısı yok · 1975
Control / Buildings / Bees / Household pests / Beehives