Red spider - Harmful animal to plants

Red spider

Red spiders are member of the Acari (mite) family Tetranychidae, which includes about 1,200 species. They generally live on the undersides of leaves of plants, where they may spin protective silk webs, and they can cause damage by puncturing the plant cells to feed.

Red spiders are known to feed on several hundred species of plants. This red spiders mite is extremely polyphagous; it can feed on hundreds of plants, including most vegetables and food crops – such as peppers, tomatoes, potatoes, beans, maize, and strawberries, and ornamental plants such as roses.


red spider on leaves

Red spider on leaves

It is the most prevalent pest of Withania somnifera in India. It lays its eggs on the leaves, and it poses a threat to host plants by sucking cell contents from the leaves cell by cell, leaving tiny pale spots or scars where the green epidermal cells have been destroyed. Although the individual lesions are very small, attack by hundreds or thousands of spider mites can cause thousands of lesions, thus can significantly reduce the photosynthetic capability of plants.

Wanna get rid of spider mites? Read this: 5 strategy to kill red spider mites

Mature red spiders are round and length about 0,35mm, dark red.

They lay small, spherical, initially transparent eggs and many species spin silk webbing to help protect the colony from predators; they get the "spider" part of their common name from this webbing.

Red spider on the ground

Red spider on the ground

Red spiders use sting to prick leaves and fruits, then sap them. On leaves, red spiders stick on the underside, wound suction scraper and formed tiny dots on the leaves. The leaves will get widespread spots, colored silver, then dry and fall. Red spiders attack on both shoots and dry branches, make them die really quick. 

Red spiders have high reproductive rate in the dry season (low humidity and high temperatures). Moreover, the fertility of red spiders are vary depending on host plants, nutrition, and the presence of predators. Temperature is the main factor that affects the populations of red spiders, the temperature changes quickly or slowly reduce their numbers. The other important factor is moisture. High humidity continuously also decrease red spiders population growth since it affects the eggs, eggs hatch are and the larvas survival. The rains also reduces populations of red spiders, heavy rain not only increases the humidity, also reducing the reproduction rate, and washed away small spiders.

How about white sipder mites? Read this: White spider mites