Subject
Diseases and pests
28
Spruce
23
Spruce budworm
16
Control
9
Balsam fir
3
Black spruce
3
Brown spruce longhorn beetle
3
Fir
3
Forest insects
3
Beetles
2
Cerambycidae
2
Insect pests
2
Red spruce
2
Spruce bark beetles
2
Spruce beetle
2
Aerial spraying and dusting
1
Aerial spraying and dusting in forestry
1
Asian longhorned beetle
1
Biological control
1
Budworm
1
Conidal
1
Ecology
1
Economic aspects
1
Emerald ash borer
1
Forest ecology
1
Forest management
1
Host plants
1
Identification
1
Insecticides
1
Nova Scotia
1
Pine
1
Plant competition
1
Risk assessment
1
Sheep laurel
1
Silvicultural systems
1
Sitka spruce
1
Tsuga
1
White pine weevil
1
White spruce
1