C. A. Johansen · Washington State University Cooperative Extension Service, Oregon State University Cooperative Extension Service, University of Idaho Cooperative Extension Service and U.S. Dept. of Agriculture

30 sayfa · 1974

Bee culture

Wounds and injuriesThe bee poisoning hazard from pesticidesC. A. Johansen

The bee poisoning hazard from pesticides

C. A. Johansen · Washington Agricultural Experiment Station, College of Agriculture, Washington State University

Sayfa sayısı yok · 1969

Bees / Environmental aspects / Environmental aspects of Pesticides / Pesticides / Wounds and injuries

Predatory insectsBeneficial predators and parasites found on Washington cropsC. A. Johansen

Beneficial predators and parasites found on Washington crops

C. A. Johansen · Cooperative Extension Service, College of Agriculture, Washington State University

12 sayfa · 1975

Beneficial insects / Parasitic insects / Predatory insects

Meloe nigerBiology and management of the alkali bee, Nomia melanderi, Cockerell (Hymenoptera, Halictidae)C. A. Johansen

Biology and management of the alkali bee, Nomia melanderi, Cockerell (Hymenoptera, Halictidae)

C. A. Johansen · Washington State Entomology Society

46 sayfa · 1978

Alkali bee / Meloe niger

CiltBrazilian beeC. A. Johansen

Brazilian bee

C. A. Johansen · Cooperative Extension Service, College of Agriculture, Washington State University

Sayfa sayısı yok · 1975

Kategori yok

CiltControl of alfalfa leafcutting bee enemiesC. A. Johansen

Control of alfalfa leafcutting bee enemies

C. A. Johansen · Cooperative Extension Service, College of Agriculture, Washington State University

10 sayfa · 1973

Kategori yok

EcologyEcology of three species of bumble bees in southwestern WashingtonC. A. Johansen

Ecology of three species of bumble bees in southwestern Washington

C. A. Johansen · Washington Agricultural Experiment Station, College of Agriculture, Washington State University

12 sayfa · 1967

Bumblebees / Ecology

CiltThe effect of pesticides on the alfalfa leafcutting beeC. A. Johansen

The effect of pesticides on the alfalfa leafcutting bee

C. A. Johansen · Washington Agricultural Experiment Stations, Institute of Agricultural Sciences, Washington State University

12 sayfa · 1963

Kategori yok

CiltEncouraging the bumble bee pollinator of cranberriesC. A. Johansen

Encouraging the bumble bee pollinator of cranberries

C. A. Johansen · College of Agriculture, Cooperative Extension Service, Washington State University

Sayfa sayısı yok · 1967

Kategori yok

CiltGet more fruit with honey bee pollinatorsC. A. Johansen

Get more fruit with honey bee pollinators

C. A. Johansen · Cooperative Extension Service, College of Agriculture, Washington State University

Sayfa sayısı yok · 1979

Kategori yok

DiseasesHoney bee diseases and their controlC. A. Johansen

Honey bee diseases and their control

C. A. Johansen · Washington State University Cooperative Extension, Oregon State University Extension Service, University of Idaho Cooperative Extension Service, and U.S. Dept. of Agriculture

Sayfa sayısı yok · 1981

Bees / Diseases

CiltHoney bees and alfalfa seed production in eastern WashingtonC. A. Johansen

Honey bees and alfalfa seed production in eastern Washington

C. A. Johansen · Cooperative Extension Service, College of Agriculture, Washington State University

Sayfa sayısı yok · 1972

Kategori yok

CiltHoney bees increase cranberry productionC. A. Johansen

Honey bees increase cranberry production

C. A. Johansen · Cooperative Extension Service, College of Agriculture, Washington State University

Sayfa sayısı yok · 1971

Kategori yok

CiltIncrease clover seed yields with adequate pollinationC. A. Johansen

Increase clover seed yields with adequate pollination

C. A. Johansen · Cooperative Extension Service, College of Agriculture, Washington State University

Sayfa sayısı yok · 1971

Kategori yok