APPLICATION OF GREY SYSTEM THEORY TO THE MIGRATION OF LADYBEETLE AND APHIS CONTROL
应用灰色系统理论探讨瓢虫的迁飞和蚜虫的防治

After being probed for years, the hypothesis of the migration of ladybeetle cocinelle septempunctata L, in China was originally put forward by Mr. Chai Xiaoming. Furthermore it was not only theoretically proved, but also practically fit into the situation.Under the certain climatic conditions of surface and ground, there appears the migration of the ladybeetle. Therefore, when considering the control of northern aphis, we should think of the migration of the ladybeetle coming and also make use of them to control the aphis. This paper applies grey system theory to expound the relationship between the migration Of the ladybeetle and the control of aphis.