What are the underground pests?

What are the underground pests? What are the symptoms of harm? Also ask the netizens who know to help introduce that the so-called underground pests live in the soil all their lives or at some stage in their lives, mainly gnawing on the underground parts of crops, seeds, seedlings or main stems near the soil surface, so that crops suffer wilting and growth retardation, and serious ones can cause crops to dry up and die, resulting in lack of seedlings, broken ridges and reduced production. Therefore, the farming network has sorted out the harm of common underground pests, such as grub, golden needle worm, ground tiger, mole cricket and root maggot, which are listed in detail below for netizens' reference. 1. The harm of grubs to crops: grubs are also called strong ground worms, and ground drain is the larva of beetle shell, which is a large group of underground pests with the most species, the widest distribution and the heaviest damage. The more common ones are big black Gill golden turtle, copper green golden turtle, dark Gill golden turtle. The main crops harmed by grubs are the seeds, seedlings and rhizomes of field crops such as millet, sorghum, wheat, legumes, peanuts, sugar beets, cotton and vegetable fruit trees, biting seeds or breaking the roots and stems of seedlings, causing lack of seedlings and broken ridges, and destroying seeds and harvesting in heavy cases, which not only reduces production, but also is easy to invade after biting. The adults of grubs are unearthed in the evening, are most active at 20-21:00, and gradually decrease after 22:00. Grub adults have weak superluminosity, and the number of insects trapped under general lights accounts for only about 0.2% of the actual number of insects in the field. And grub adults will fake death, fall to the ground immediately by vibration or shock, flying ability is weak, the range of activity is generally mainly in the source of insects. Mainly concentrated in the field edge, ditch edge or land and other non-cultivated land, like to eat poplar, soybean, peanut and other crops leaves, which will lay eggs in these trees near the field or cultivated land. Click to view > > Prevention and control methods of grubs 2. The harm of golden needle insects to crops: Golden needle worms are also called kowtow worms, and iron filariae are the larvae of kowtowing worms, which are more common in farmland. The species of golden needle insects are golden needle worms, thin-breast golden needle worms, brown needle worms, wide-backed golden needle insects, generally the most serious harm is golden needle insects. Because the adult golden needle worm does not stay above the ground for a long time, it can only eat the tender leaves of crops such as cereals and beans, so the damage is not so serious. However, Golden Needle worms live in the soil for a long time, often endangering corn, wheat, sweet, cotton, legumes and all kinds of vegetables and forest seedlings. Golden needle insects mainly bite the seeds planted and damage the endosperm, so that crop seeds cannot germinate; golden needle worms also bite the whisker roots of crop seedlings, resulting in poor growth or even death of crops; generally speaking, golden needle worms rarely harm the main roots of crop seedlings, and the roots damaged by golden needle insects are irregular and filamentous, which is a typical damage caused by golden needle worms. And the golden needle worm can also eat into the tuber or root, which is conducive to the invasion of pathogens and cause rot. Click to see > The ground tiger can harm many kinds of food crops, such as cotton, vegetables, tobacco, traditional Chinese medicine, fruit trees and so on. The young larvae of the ground tiger can feed on the cotyledons, tender leaves and stems of the crops day and night after the 3rd instar, and the old larvae can bite off the seedlings near the surface, resulting in lack of seedlings, broken ridges and even seed replanting. Click to view > ground tiger control methods 4, the harm of mole cricket to crops: mole cricket is also called Lala cricket, mole cricket is the most active underground pest, mole cricket mainly bites the seedlings of seeds of various crops, especially like to eat newly germinated seeds, resulting in serious lack of seedlings and broken ridges. And mole cricket is good at crawling on the surface of the soil, running around, tunnel vertical and horizontal, resulting in seeds can not germinate, seedling roots dry and die. Mole cricket generally sleeps during the day and goes out at night, active at 21-23:00 or at the feeding peak, mole cricket has strong phototaxis and chemotaxis, and a large number of oriental mole crickets can be induced by black light in a moonless, windless, muggy night. Mole cricket has a strong taxis to substances with fragrance and sweetness, and is addicted to millet, cottonseed, fried bean cake, wheat bran and so on. 5. The harm of root maggots to crops: root maggots are also called ground maggots. Maggots are the larvae of species flies, onion flies, cabbage flies, radish flies and wheat flies. Root maggots mainly harm cotton, corn, potatoes, legumes, melons, cruciferous vegetables, spinach, onions, garlic and other crops. Root maggot larvae often drill into the seed or seedling stem, or eat from the bottom up in the rhizome, killing the whole plant, resulting in lack of seedlings and broken ridges. The pupa of root maggots overwintered in the general soil, and the adults of root maggots like to eat nectar and decay and often lay eggs on manure. Root maggots often occur seriously when unripened manure and poorly fermented cake fertilizer are applied in the field. Adults can also lay eggs on wet soil, soil crevices or leaves of crops close to the ground, and the larvae hatch into the soil to do harm and like to live in a humid environment. Pupate in the soil near the killed plant after ripening. When the temperature exceeds 35 ℃, it is disadvantageous to the survival of eggs, larvae and pupae. What is carbofuran? what are the specific drugs for underground pests?