摘要
对玉米蚜发生动态的室外自然调查结果表明,玉米蚜在陕西关中的寄主植物主要有玉米、小麦、大麦、高梁、莠子草、稗草、狗尾草、蟋蟀草、狗牙根及马唐草等。其在10月中、下旬迁入麦田,以无翅成蚜在小麦根际地下越冬。7月上旬迁入玉米田,发生高峰在玉米抽雄期和雌穗成熟前期,与寄主营养良好的生育期一致。有翅蚜的发生有3个高峰期,分别是7月下旬玉米大喇叭口期、8月下旬散粉结束雄穗逐渐干枯期和9月中、下旬玉米营养和气候条件恶化时。抽雄以前在玉米植株的分布由基部到心叶逐渐增多;玉米抽雄以后,由雄穗逐渐向下部移动。玉米蚜在玉米植株上的分布动态因植株的营养状况及气温变化而不同,一般主要分布于植株较幼嫩和隐蔽的部位。
Based on the systematic investigation in field,the host plant of Rhopalosiphum maidis include barley,maize,sorghum,white,and some weeds in guanzhong region of Shaanxi.The aphid immigrated into wheat field in the middle and last ten days of October,and lived through the winter under ground around wheat roots.In the first ten days of July it immigrated into the maize field,the maximum population occured at taseeling period and before ripening,and coincided with hosts fine nutrition development period.The maximum population of apterae occurred at the last ten days of July (big horn period),the last ten days of August (taseel withered period),and the middle and last ten days of September respectivelly.Before taseeling the population gradually increased from the base of maize to center leaf,moved from taseel to silk after taseeling.The distribution dynamic of the aphid on maize varied with nutrition of the plant and temperature,commonly distributed in the tender and the shaded foliage.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2003年第B10期25-28,共4页
Journal of Northwest A&F University(Natural Science Edition)
基金
陕西省农业科技重点推广项目"小麦病虫害综合防治新技术推广
