摘要
通过田间系统调查,研究了鲁西麦套棉田捕食性节肢动物的组成和发生动态,以期为转基因棉田自然天敌的保护和利用提供依据。鲁西麦套棉田捕食性节肢动物主要有龟纹瓢虫、日本通草蛉、东亚小花蝽、草间钻头蛛、八斑鞘腹蛛和星豹蛛。群落的均匀度、集中度、多样性均表现为8月份之前较高,8月份较低,8月份后又表现为较高。龟纹瓢虫、日本通草蛉、东亚小花蝽在田间的种群数量分别在6月中下旬、7月下旬至8月上旬、9月上旬出现3个高峰期。草间钻头蛛种群数量在6月下旬出现高峰,9月上旬之前数量逐渐降低,9月中旬以后数量又逐渐上升,出现一个小高峰。八斑鞘腹蛛、星豹蛛种群数量在6月中旬出现高峰后,数量逐渐下降,7月份以后种群数量维持在较低水平并持续到棉花收获。鲁西麦套棉区,在小麦收获后,大量捕食性天敌转移到棉田,其中龟纹瓢虫、日本通草蛉、东亚小花蝽、草间钻头蛛的种群数量在棉花的生长期均保持了较高水平,对棉田的害虫控制起到重要作用。
For conservation and utilization of the natural enemies of pests in the transgenic cotton fields,composition and population dynamics of predatory arthropods in the field of cotton interplanted with wheat in western Shandong Province were studied by systematic investigation.Propylaea japonica,Chrysoperla nipponensis,Orius sauteri,Hylyphantes graminicolum,Coleosoma octomaculatum and Pardosa astrigera were main predatory arthropods in the fields of cotton interplanted with wheat.Evenness,concentration and diversity of arthropod community were high before August,and decreased in August,then increased after August.Populations of P.japonica,C.nipponensis and O.sauteri all had three peaks in the middle and late June,the late July to the early August and the early September.Population of H.graminicolum had a peak in the late June,then decreased gradually until the early September,and got to a little peak after the middle September.Population of C.octomaculatum and P.astrigera decreased gradually after a peak in the middle June,and their populations were always at a low level after July.A lot of predatory arthropods moved from wheat fields to cotton fields after the harvest of wheat.P.japonica,C.nipponensis,O.sauteri and H.graminicolum all maintained at high population levels in the cotton growing period,which might mean that they are important to control of the cotton pests.
出处
《植物保护》
CAS
CSCD
北大核心
2012年第2期160-162,共3页
Plant Protection
基金
国家自然科学基金重点项目(31030012)
公益性行业(农业)科研专项(201103012)
关键词
棉花
小麦
套种
捕食性节肢动物
种群消长
cotton
wheat
interplanting
predatory arthropods
population dynamics
