摘要
禾谷缢管蚜种群数量和危害历期是造成小麦产量损失的主要因素。采用累积虫日作为危害量指标 ,建立了蚜虫危害量与小麦产量损失的回归模型 ,即Y1=1 42 5 0 + 5 35 2 9× 10 -4 X1,Y2 =1 1780 + 0 0 10 6X2 。
The population number and infecting period of Rhopalo siphum padi in wheat as an index were studied. Based on cumulative insectdays, the regression model between infection quantity of the aphid and ratio of yield loss at different stage was established, that was, Y 1=1 425 0+5 352 9×10 -4 X 1,Y 2=1 178 0+0 010 6 X 2. The dynamics economic threshold was proposed.
出处
《植物保护》
CAS
CSCD
北大核心
2000年第6期12-14,共3页
Plant Protection
关键词
禾谷缢管蚜
小麦
危害损失
防治指标
damage
yield loss
economic threshold
Rhopalosiphum padi (Linnaeus)
