Allelopathy of Ageratum conyzoides L.Ⅶ.Syntheses of analogs of ageratochromene and their inhibitory effects on plants and microorganisms Allelopathy of Ageratum conyzoides Ⅷ. Allelopathic Effects of Residues on Peanut and Related Weeds in the Field Allelopathy of Ageratum conyzoides Ⅸ. Transformation of Main Allelochemical in the Soil EFFFECTS OF AILEIOCHEMICALS FROM AGERATUM CONYZOIDES ON THE FIELD POPULATION OF DIAMONDBACK MOTH (DBM), PLUTELLA XYLOSTELLA