wheat aphid 第1页

Diversity and interspecific relationship of wheat aphid and natural enemy system in Ningxia Community diversity and population dynamics of dominant parasitoids and hyperparasitoids of wheat aphids in Zhongning County, Ningxia Insecticidal activity of alcohol extracts from Peganum harmala Effects of enhanced UV-B radiation on population quantity dynamics of weeds,soil macroanimals and wheat aphids in the wheat field ecosystem Forward trajectory analysis of wheat aphids during long-distance migration using HYSPLIT model The effects of wheat planted adjacent to rape on wheat aphids population dynamic Comparison of occurrence periods of wheat aphids based on artificial neural network and wavelet neural network prediction systems Effects of host density on parasitoids and hyper-parasitoids of cereal aphids in different agricultural landscapes Effects of landscape structure and key landscape factors on aphids-parasitoids- hyper parasitoids populations in wheat fields STUDY ON THE RELATIONSHIPS AMONG WHEAT APHIDS, NATURAL ENEMY AND YIELD LOSS OF WHEAT AND THE ACTION THRESHOLD OF APHIDS Influence of natural enemies on populations of wheat aphid and greenbug STUDIES ON PREDATION AND SIMULATION MODEL OF SEVEN SPOT LADYBIRD, COCCINELLA SEPTEMPUNCTATA L. TO WHEAT APHID,MACROSIHUM AVENAE F. Population dynamics of wheat aphids in different agricultural landscapes