摘要
1988-1990年在四个县进行了小麦棉花套种对棉花害虫的生态效应调查。结果是棉花主要害虫苗蚜基本得到了控制,二代棉铃虫卵量减少37.8％,伏蚜发生期晚4天,卷叶历期短2.5天。次要害虫棉红蜘蛛、四代棉铃虫、一代小地老虎、一代玉米螟重于单作棉田。主要生态原因是麦套棉田天敌多69.6％,控害效果好,套作棉行气温低1.3-1.6℃,相对湿度高20％-23％,再加麦行的其他作用,抑制了主要害虫,有利于次要害虫。
In 1988-1990, the ecological effects of cotton interplanted in wheat field on cotton pests were observed systematically in four counties. In the interplanted field, the spring type cotton aphid Aphis gossypii Glover was basically kept under natural control, the egg amount of sec- ond generation cotton bollworm Heliothis armigera (Hübner) decreased 37.8%, the occurrence time of summer type cotton aphid was four days delayed, and duration of leaf rolling was 2.5 days reduced; contrarily, the damage of cotton Spider mites Tetranychus cinnabarinus (Boisduval) and T. truncatus Ehara, 4th generation cotton bollworm, 1st generation black cutworm Agrotis ypsilon Rottemberg, and 1st generation Asian corn borer Ostrinia furnacalis (Guenee) were more serious, in comparison with the simplex cotton field. The ccological factors causing the re- sults mentioned above were possibly as follows. (1) the number of nat- ural enemies in interplanted cotton field was 69.6% increased, which enhanced the control effect of insect pests; (2) the air temperature and relative humidity in interplanted cotton row were 1.3-1.6℃ de- creased and 20%-23% increased, respectively, in addition with the other effects of wheat row, have suppressed the main insect pests, but promoted the secondary ones.
出处
《植物保护学报》
CAS
CSCD
北大核心
1993年第2期163-167,共5页
Journal of Plant Protection
关键词
小麦
棉花
套作
虫害
interplanted cotton
simplex cotton
Aphis gossypii
Heliothis armigera
ecological effect
