槐蚜(Aphis laburni Kalt.)能否加害棉花是农业生产上一个实际问题。很多农民要求砍去在棉田附近的槐树,认为槐树上集中了密度极大的槐蚜,就是棉花上蚜虫的来源。西北农学院林学系的教师和陕西省农林厅的干部几次征询周尧教授,都给予了否定的答复。但是苏联M.洛佐瓦茨卡等所著的“苏联棉花的栽培技术与病虫害防治”一书中说:“槐蚜大多数是在5月至6月初旬从洋槐上直接迁移到棉田和苜蓿地里和豆科植物的杂草上面,在这些杂草衰老的 Whether Aphis laburni Kalt. Can harm cotton is a real problem in agricultural production. Many peasants demanded to cut off the locust trees in the vicinity of the cotton fields. They believed that the locust locusts concentrated on the most dense locust locusts and were the sources of aphids on cotton. Northwest College of Agriculture faculty and Shaanxi Provincial Department of Agriculture and Forestry cadres consulted Professor Zhou Yao several times, gave a negative answer. However, in the book “Cultivation Techniques and Pest Control of Cotton in the Soviet Union” by the Soviet Union M. Lozhuvacka et al., "Most of the sophorphos mostly migrated directly from Sophora japonica to cotton fields and alfalfa from May to early June. The weeds in the ground and the legumes are above these weeds