Harmful symptoms of red spider

Red spider is a pest that threatens many plants, mainly harming vegetable crops such as Solanaceae, Cucurbitaceae, Leguminosae, Liliaceae and so on.

First, the basic introduction of red spiders

The red spider is an animal of the family Tetranychidae, the adult mite is red, 0.42-0.52 mm long, the body color varies greatly, there is a long black spot on each side of the back of the body; the young mites are nearly round, there are 3 pairs, the overwintering generation young mites are red, and the non-overwintering generation young mites are yellow.

Red spiders lay about 100 eggs once a year, and a month later they begin to hatch. The female spiders wait day and night and are willing to be the first food for their children, teaching them to hunt, but sacrificing themselves.

Second, red spider harm symptoms

In the early stage, there are very small yellowish-brown spots on the leaves, when there are a large amount of red spiders crawling on the surface of the plant, there are large red patches on the back of the leaves, and then the leaves will curl, turn yellow or even fall off, and the leaves of the whole plant will turn yellow and white.

The red spider pest reached its peak in mid-May, and the peak period was from July to August, especially from late June to early July.

3. Control methods of red spiders

1. For most red spiders, they belong to high temperature active type. The temperature determines the development cycle, reproduction rate and yield of red spiders. Dry and hot climatic conditions often lead to its occurrence. Must be timely prevention and control before the advent of the hot and dry season.

2. Use 10% bendazalin EC (such as Guoguang Hongxie) 1000 times solution or 10% Bendazalin EC (such as Guoguang Hongxie) 1000 times solution + 5.7% methylvitamin salt EC (such as Guoguang Lok) 3000 times solution after spray control, it is recommended to use it twice, the interval is generally 7-10 days.