摘要
目前南疆粮棉混作区有三种粮食生产模式,即吨粮田(冬小麦套作夏玉米)、二熟制(麦收后复播夏玉米)、多熟制(冬小麦套作春玉米,小麦收获后种植夏玉米等短季作物)。这三种模式中第一茬玉米播种时间不同。研究比较了吨粮田中夏套玉米和多熟制中春套玉米对棉田第二代棉铃虫数量的影响,结果发现多熟制中春套玉米对棉铃虫产卵有很强的吸引作用,可以使棉田第二代棉铃虫卵量减少55.7%,幼虫数量减少57.1%,对防治棉田第二代棉铃虫有明显作用。
South of Xinjiang is a mixed cultivation region of grain and cotton crops. There grains are produced in three different systems, i. e. ton-grain system (corn is undersown in winter wheat fields in mid-May), two-crop-per-year system (corn is sown in late June to early July after winter wheat was harvested), and multi-harvest system (corn is interplanted in winter wheat fields in late March to early April, other short season crops are sown when winter wheat was harvested). This paper studied the effects of corn plants in ton-grain and multi-harvest systems on the occurrence of the second generation of cotton bollworm (Helicoverpa armigera Hubner, Lepidoptera: Noctuidae) in cotton fields. The results showed that the corn plants in multi-harvest system strongly attract cotton bollworm adults when they are ovipositing, therefore can reduce the density of cotton bollworm in cotton and provide a good protection. The numbers of eggs and larvae in cotton fields in multi-harvest system area are decreased by 55.7% and 57.1% when compared with those in cotton fields in ton-grain system area.
出处
《新疆农业科学》
CAS
CSCD
2005年第2期114-116,共3页
Xinjiang Agricultural Sciences
基金
"十五"国家科技攻关计划课题"棉花重大病虫害可持续控制技术研究"(2004BA509B05)和"棉区区域性有害生物生态调控技术研究"(2001BA507A-04-05)
关键词
粮食生产模式
棉花
棉铃虫
生态控制
数量
新疆
grain production system
cotton
Helicoverpa armigera Hubner
ecological control
