地膜覆盖玉米田病虫草害发生动态及防治研究

经过３年的调查研究，明确了玉米覆盖田病虫草害发生消长动态及为害情况，探讨了发生变化的原因，提出了防治技术措施。

Studies on the Population Dynamics and Control of the Main Pests in Maize Field Mulched by Plastic Film

This paper systematically compared the occurrence pattern of main pests in maize field mulched by plastic film with in the field unmulched.Under codition of plastic film mulch,the population dynamics of the pests showed new characters.Because of the changing of agricultural microclimate,some main insect pests such as corn borer,underground pests and weeds earlier than unmulched,population number was increased and damage became more serious.Only corn smut(Sphacelotheca reiliana) was obviously decreased.The pest occurrence tendency was serious in the first period of the vegetation than became lighten.The point of control shoulg be in the first period of the vegetation.Serial measures of integrated control were developed.