Allelopathy of Ageratum conyzoides Ⅱ. Releasing mode and activity of main allelochemicals Allelopathy of Ageratum conyzoides Ⅴ.biological activities of the volatile oil from ageratum on fungi,insects and plants and its chemical constituents Application of ecologic niche models in explanation of niche shift of invasive alien species Module biomass of Ageratum conyzoides populations in different habitats Allelopathy of Ageratum conyzoides Ⅷ. Allelopathic Effects of Residues on Peanut and Related Weeds in the Field Allelopathy of Ageratum conyzoides ⅥEffects of meteorological conditions on allelopathy of Ageratum conyzoides Biomass, cadmium accumulation and chlorophyll fluorescence parameters response of Ageratum conyzoides to different concentrations of cadmium stress Study on Interactions Among Allelochemicals of Ageratum conyzoides Pathogen identification of Ageratum conyzoides bacterial wilt disease and its biological characteristics