红胫戟纹蝗损害牧草及其防治指标的评定

摘要

1994年4～8月进行红胫戟纹蝗虫损害牧草及防治指标的评定。结果表明，红胫戟纹蝗的体重、食量和牧草掉落毁损量三者之间呈正相关。红胫戟纹蝗个体一生的牧草损失量为：L＝1.4039g/头。红胫戟纹蝗在荒漠、半荒漠草原的防治指标为：≥8头/m2。%The Dociostaurus(S.) Kraussi kraussi(Ingen)is the most destructive insect found in the desert and semi-desert grassland of Xinjiang Autonomous Region of northwest China.rn　　1.The Dociostaurus(S.)Kraussi kraussi (Ingen) body weight,intake and forage loss are positively correlated.rn　　2.Life time forage intake by dociostaurus(s.) Kraussi kraussi (Ingen) is L＝1.4039g/head. rn　　3.Economic threshold of Dociostaurus(S.) Kraussi kraussi (Ingen) in Xinjiang semi-desert grassland is ≥8 head/m2