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Effect of substitution ratio of Imperata koenigii on competitiveness and growth potential of three species of cold season lawn grass Screening of Methyl Jasmonate-Insensitive Mutants in Maize THE CONTROLLING EFFECTS OF ANGLED BITTERSWEET OIL ON SOME MAJOR DESTRUCTIVE INSECT FOR VEGETABLES AND STORED GRAINS Relationships between Lepidosaphes salicina Attack and Contents of Tannins and Phenolic Acids in Leaves of Different Syringa Species and Cultivars Leaves On trunk attacks and the killing mechanism of Tomicus yunnanensis (Coleoptera: Scolytinae) on Pinus yunnanensis trees STUDY ON MODELS FUNCTIONAL RESPONSE OF PREDATOR TO PREY Simulation and Analysis of Number of Firefighters Dispatched in Initial Attack of Forest Fire in Heilongjiang Province Acute toxicity studies on compatibility of “pinellia, trichosanthes, fritillaria, ampelopsis, bletilla attack aconitum”