Columbia subject headings:
Insect pests--Biological control.
Pesticides and wildlife.
Pesticides--Toxicology.
Harvard subject headings:
Insect pests--Biological control
Pesticides and wildlife.
Pesticides--Environmental aspects
Pesticides--Toxicology
Princeton subject headings:
Insect pests--Biological control.
Pesticides and wildlife.
Pesticides--Toxicology.