pear aphides 梨树蚜虫
aphides s 蚜虫
citrus aphides 柑橘蚜虫
gall aphides 球蚜
maize aphides 玉米蚜
aphides damage 蚜虫危害
sorghum aphides 高粱蚜
prevent aphides 防治蚜虫
systemic aphides 内吸性杀蚜剂
I bound the base of the tree with sticky tape, making it impossible for the ants to reach the aphides.
我用一条胶带把桃树底部包上，不让蚂蚁接近蚜虫。
The parameter adaptive law is formed, we adjust the parameters to make sure the density of spruce aphides and their predator track the ideal trajectory, the stability of the system is guaranteed.
建立参数自适应律，调整控制系统参数，使天敌-害虫的种群密度渐进的跟踪理想轨迹，保证了该系统的稳定性。
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