Subject
Spruce budworm
10
Pest management
4
Aerial spraying and dusting in forestry
3
Bacillus thuringiensis
3
Control
Biological control
2
Predation (Biology)
2
Aquatic ecology
1
Balsam fir
1
Defects
1
Deterioration
1
Diseases and pests
1
Dispersal
1
Effect of insecticides on
1
Environmental aspects
1
Environmental monitoring
1
Fir
1
Identification
1
Insecticides
1
Insects
1
Jack pine budworm
1
Larvae
1
Ohmmeters
1
Parasites
1
Predatory animals
1
Research
1
Spruce
1
Trees, Care of
1
Western spruce budworm
1
Wood
1