1, timely control of a hop During the season when the temperature is high, most of the adults in the noon will sneak back into the soil, and it is generally more difficult to kill by spraying. It can be sprayed in the morning from 7:00 to 8:00 or from 5:00 to 6:00 in the afternoon. At this time, the activeness of the adult is poor and the efficacy is good. In autumn and winter, beetles are active around 10:00 a.m. and 3:00 p.m. to 4:00 p.m.. They are easily disturbed and flee from place to place. But at noon, they often fall on the bottom of leaves. Therefore, the insect can be sprayed when the adult has just emerged in the morning, or when the adult activity is in a "fatigue" state at noon and afternoon. 2, first outside and then inside There is a strong jump in the beak, spraying from the inside out, the beetle is easy to escape, so when spraying, care should be taken from the side of the field to spray in order to prevent the adults with strong jumping ability to escape. If the plots are wider, they should be sprayed around the perimeter to kill insects. The field is narrow and long, and it can be sprayed at one end and then sprayed from the other end so as to “surveillance and intercept†to prevent adult worms from fleeing. Spraying should be light and do not disturb adults. 3, the upper and lower governance A jump shot only considers spraying on the ground, which tends to be less effective. Not only does the fleabee harm the crop leaves, but it also harms the roots of the crops, and it should take the same treatment from top to bottom.