What pesticide control of aphids in fruit trees?

a. Traditional pesticide spray control has aphidicarb emulsion, anti-phidicarb, imidacloprid, acetamiprid and other pesticides, but aphids are prone to pesticide resistance, the effect is not very good.

b. Use washing powder, urea, water in the ratio of 1:3:300 for preparation. Preparation with hot water to dissolve the washing powder, and then add urea and water, mix well. The prepared liquid will be sprayed on the aphids, which can achieve the dual role of insecticide and fertilizer.

Insecticidal mechanism: urea has the effect of destroying the aphid body wall chitin, washing powder contains surfactant sodium alkylbenzene sulfonate, which can make the aphid body wall waxy layer dissolution, and attached to the top of the formation of impermeable, impermeable film, resulting in the aphid stomatal blockage suffocation. Mixed use of the two, high efficiency, non-polluting, convenient and have the effect of fertilizer.

Precautions: the preparation of the mixing should be sufficient, do not leave particles, these particles are easy to cause fruit tree leaf scorching. Spraying should be uniform, be sure to spray the liquid on the aphids, otherwise it does not work.