First, the introduction of cricket varieties
1. Chinese crickets
(1) The body length of the Chinese cricket is about 2 cm, the body is black brown, and it grows 1 generation per year, mainly overwintering in the soil with eggs, and the male pronunciation apparatus is near the base of the forewing, generally pronounced by wing friction.
(2) The auditor is located on the tibia of the forefoot, cave-dwelling, often in the ground, ground or masonry crevices, mainly harmful plant roots, stems, leaves, seeds and fruits, etc., like to eat at night, generally bite the tender part of the plant near the ground, resulting in lack of seedlings, is an agricultural pest.
2. Large coffin head cricket
The head of the large coffin cricket is flattened, the front end is flat, and the forward tilt is tilted forward, and the male head is obviously protruding to the sides, and the males will also fight each other, but they are not as aggressive as the fighting crickets.
3. Oil gourd
(1) The body of the oil gourd is dark black, glossy, the inner upper part of the two compound eyes has yellow stripes, directly to the back of the head, the forewings are light brown, there is also luster, and the hind wings are more developed and have the ability to fly for a short time.
(2) Female egg layers up to 2 cm long, like to forage at night, adult insects and nymphs are harmful to sorghum, soybeans, peanuts, melons, vegetables and other crops, distributed in all provinces of the country.
4. Chinese stove cricket
(1) Chinese stove crickets are also known as "white crickets", mainly because they are commonly found in rural stoves and named stove crickets, Chinese stove crickets are a subspecies of orthoptera, different from field crickets, its body is small, mild, the whole body is milky white, large as peanut rice, small as wheat grain.
(2) The flat head has 1 pair of tentacles and 1 pair of compound eyes on both sides, the cylindrical abdominal cavity has a brownish red ring pattern, the ventral end has a small figure-of-eight tail, the back has 4 small wings that degenerate, and the 2 arched thighs are the main organs of its bounce.
(3) Chinese stove crickets can climb and jump, clever and well-behaved, occasionally catch 1 into the palm, it will dance tentacles, look at people, and make a chirping sound, and then quickly jump out of the palm to escape, the general old farmer often put it into the small gourd to raise, in the snowy, dripping water into the winter, can hear its call.
Second, the harm of crickets
1, crickets are a kind of agricultural pest in Northeast China, North China, the lower reaches of the Yangtze River and South China, crickets will destroy the roots, stems, leaves, fruits and seeds of various crops, generally the damage to seedlings is more serious.
2, in the southern region, peanuts by crickets damaged peanut seedlings up to 11%-30%, crickets also harm jute, corn, tobacco, cotton, soybeans and cassava and other crops, often cause lack of seedlings, affecting crop harvest.