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Comparing on the inducing Cucurbitacin B content in cotyledon of squash aroused by Aulcophora femoralis chinensis (Coleoptera:Chrysomelidae) and mechanical damage A COMPREHENSIVE ANALYSIS ON FIXED FOREST PEST AND DISEASES, MONITORING FINDINGS IN NEWLY ESTABLISHED HIGH-YIELDING TIMBER PLANATATIONS OF MAIN SPECIES SIMULATION STUDY ON LOSSES OF PINE TREE(PINUS MASSONIANA LAMB) DAMAGED BY PINE CATERPILLAR (DENDROLIMUS PUNCTATUS WALKER)AND AN ANALYSIS FOR MANAGEMENT STRATEGIES