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Symptoms and Signs of Tree Injury
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adults alternate hosts aphid Apply a registered APR MAY JUN areas AUG SEP OCT Austrian pine Avoid planting azinphos-methyl Bacillus thuringiensis bark beetles Biology blister brown needles buds budworm carbaryl cause similar symptoms chlorpyrifos Christmas trees cide damage dead defoliated demeton diazinon Diplodia shoot blight discolored DORM APR dormant oil Douglas-fir eastern white pine emerge Examine trees feed foliage Forest Service fruiting bodies harvest herbicides infested trees insects JUL AUG SEP JUN JUL AUG kill trees larvae lay eggs lindane lnspect trees Look malathion mites Monitoring needlecast North Central Forest nursery or plantation pest specialist Pesticide Table Pests that cause Pine Grosbeak pine sawfly pine weevil Plant only pest-free red pine registered insecticide sawfly scales scleroderris canker Scotch pine seedlings shearing ship infested shoot tips soil spittlebug spores Spray trees spring spruce stem stumps THlS CROP Treat entire plantation U.S. Department weevil white pine yellow