Plant allelopathy types and their application in agriculture Preliminary Study of Pesticidal Bio-activities of Ligusticum sinense Extracts Models and methods for information extraction of complex ground objects based on LandSat TM images of Hainan Island, China Modes of Action of Phytochromes in Establishing DifferentPhototropic Responsiveness of Maize Coleoptiles Effects of saponins from Schima superba on cell morphology, physiological and biochemical indices of Magnaporthe oryzae