玉米粗缩病由灰飞虱传播,近几年来越冬灰飞虱带毒率越来越高,2011年带毒率达30%～40%,往年为10%左右,加上该病的发生受玉米品种、播期、环境和管理等方面的影响较大,目前粗缩病防治已经成为玉米产区农民最为关心的问题。现将影响玉米粗缩病发生因素和“一二直”防治的关键技术介绍如下。 Maize sliver is transmitted by the Laodelphax striatellus. In recent years, the prevalence of the Laodelphax striatellus larvae has been increasing. In 2011, the lethal rate was 30% -40%, about 10% in previous years, and the incidence of this disease Maize varieties, sowing date, environmental and management aspects of the greater impact of the current prevention and treatment of coarse-grained diseases has become the most concerned about the farmers of corn-producing areas. The key factors that will affect the occurrence of maize sliver diseases and the prevention and control of “one or two straight” diseases are as follows.