What are the characteristics of the damage caused by peach aphids? What conditions are needed for this to happen?

Damage characteristics: Aphids use the stylet to pierce plant tissue to feed on sap, and also use the stylet to test for food. The viral diseases in the stylet also decrease as the frequency of feeding increases. The main harm caused by aphids to processed tomatoes is the spread of various viral diseases.

Occurrence conditions: The temperature suitable for aphids to migrate is above 21℃ and the relative humidity is below 80%. High temperature and high humidity can inhibit their migration, so the occurrence of aphids is more serious in dry weather. Light and wind have a great influence on the migration of aphids. It can take off when the light intensity reaches 10,000 lux. When the light intensity reaches more than 30,000 lux, the aphids not only do not take off, but the aphids that are ready to take off crawl back to the back of the leaf. Wind speed not only determines whether aphids can migrate, but also the direction in which they migrate. When the wind speed reaches 1.87 meters/second, aphids cannot fly independently and can only fly with the wind.