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attack the tree autumn bark surface beetle booklet branches and trunk cause the tree chances for survival chlorophyll dead defoliation occurred disease organisms dry weather energy feeder roots feeding tunnels fewer in number Figure foliage was eaten food production food reserves foreground Forest fungi growing season growth stages gypsy moth caterpillar gypsy moth defoliation Hamden healthy or vigorous healthy tree Hurts Your Tree insect attacks insecticide larvae late laying eggs leaf disease leaf growth leaves appear leaves are formed less food lighter green low food minerals mulch oak tree showing opportunistic produce less Program reserve foods root rot fungus roots fig rot fungus growing shed shoestring root rot shoots and roots showing symptoms soil compaction Spraying spring sprouting stress tolerate defoliation tree after defoliation tree begins tree fig tree is weakened tree refoliate tree weakened tree's twig twolined chestnut borer undefoliated tree weaken the tree weather conditions winter wood