Studies On Rhopalosiphum Maidis At Zagazig Region

The aim of the present work is to study the changes in population size and population growth of aphid colonies wich may contribute in finding out essential informations needed for solving the problem of aphid control management also detailed knowledage on host plants of aphid , the rslation between the degree of infestaion and the final yield aphid occurrence and seasonal abundance susceptibility of maize barley and wheat cultivars to aphid attack nwere studied.