What are the characteristics of peach aphid harm? What conditions do you need to happen?

Hazard characteristics: Aphids penetrate into plant tissues through oral needles to feed on juice, and also try to feed through oral needles. The viral diseases of oral acupuncture also decreased with the increase of feeding times. The harm of aphids to processed tomatoes is mainly to spread a variety of virus diseases.

Occurrence conditions: The suitable temperature for aphid migration is above 265,438 0℃ and the relative humidity is below 80%. High temperature and humidity can inhibit its migration, so the occurrence of aphids is more serious in dry weather Light and wind have great influence on the migration of aphids. You can take off when the light intensity reaches 10000 lux. When the light intensity reaches more than 30000 lux, aphids not only do not take off, but also climb back to the back of leaves. Wind speed can not only determine whether aphids can migrate, but also determine the direction of migration. When the wind speed reaches1.87m/s, aphids cannot migrate independently, but only with the wind.