attack
big plan
botanical
calamity
canada
caterpillar
conservation
contamination
cycle
dendrologist
dendrology
desolation
devastation
devour
drink
ecology
environment
eradicate
eradication
flora
foliage
forest
forestry
gap
garden
hardwood
harm
hole
holey
infestation
insecticide
insects
larvae
multiplication
nature
nuisance
nursery
parasites
parasitize
pesticide
photosynthesis
planting
prevention
resources
scourge
season
sheet
sheets
sick
to eat
to inform
tree
trees
trouble
vulnerability
vulnerable
wooded
woodland