United States.: Division of Entomology

Subjects

Insect pests., Entomology., Insect pests, ., American foulbrood--Law and legislation--North America., Boll weevil., Botany--Black Hills National Forest (S.D. and Wyo., Chinch-bugs--Control--North America., Chinch-bugs--North America, Codling moth., Diseases and pests., Entomology--Experiments., Food storage pests, Grain, Household pests., Insect pests--Control--Law and legislation--North America, Insect pests--Northeastern States., Insect pests.Entomology., Insect-plant relationships, Mosquitoes, Nursery stock--Diseases and pests, Pine--Diseases and pests--Black Hills National Forest (S.D. and Wyo.., Plant parasites--Black Hills National Forest (S.D. and Wyo., San José scale, San José scale--Control.