Spiders are the natural enemies of many agricultural and forestry pests, so where are they distributed?

Arthropoda , Arachnida , Araneida , Araceida , is a generic term for all species of the order Araneida or Araneae. It is found worldwide except Antarctica. From sea level to 5,000 meters above sea level, it is terrestrial.

Arachnidae of the family Dipterae

Spiders are divided into two suborders: (1) there is 1 family in the middle woven suborder, with a total of more than 20 species; (2) post-woven suborder (about 107 families, nearly 40,000 species).

Among them, the posterior woven suborder is divided into A: protoaxax (about 14 families, more than 1500 species); B: neospina (about 93 families, more than 3800 species).

Spiders are the natural enemies of many agricultural and forestry pests and play an important role in biological control, and the protection and utilization of spiders has become an important part of biological control. Spiders can be medicated for prolapse, sores, underarm odor and other symptoms. The venom of a few spiders such as the Black Widow (Inter-Spotted Spider and Erythropoda) is harmful to humans and animals. The burrowing tarantula of the tarantula family is distributed in Europe and Asia, and is common in Xinjiang, China, and its poison can kill humans and animals; some spider toxins have hemolytic enzymes, which can cause local necrosis and ulceration of wound tissue and expand to the surrounding areas.

By the mid-19th century, spider research had developed rapidly. As of December 31, 2011, there are 42,751 species (subspecies) of 3859 genera in 110 families of spiders worldwide. Due to the different geographical and ecological conditions around the world, the distribution of spiders is extremely uneven.   These spiders can be roughly divided into three types: safari spiders, knotted spiders and cave spiders. The first type will forage around, and the second type will wait for the rabbit after the net. And most of the people who keep them as pets are the third category: cave spiders. They like to hide in sand piles or holes, forming nets at the mouth of the holes, which are not sticky in themselves, and are purely used to sense the size of their prey and prey on them.

This article is edited by headline encyclopedia users Wanding Xingchen Feifei and Shan Chuan.