Keywords :
water caltrop , Homoptera , Coleoptera , Trapa , Aphididae , Nanophyes , biological control of weeds , Cicadellidae , aduatic weed , Chrysomelidae , Northeast Asia , Nymphula , Europe , Paraponyx , water chestnut , Galerucella , diseases , Diptera , Bagous , Insecta , herbivores , fungi , Chironomidae , surveys , Lepidoptera , Curculionidae