Underground pests refer to omnivorous insects that live in the soil at a certain stage of life or endanger the underground parts, seeds, seedlings or main stems of the soil. There are many species, mainly cockroaches, crickets, golden worms, and tigers. Roots, roots, roots, roots, cockroaches, rice roots, sugarcane roots and termites, etc. What are the underground pests? Here are the characteristics of underground pests and underground pests.
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The common name is cultivating dogs, larks, hyenas, dog shit, cockroaches, etc. It is not completely metamorphosis, and it takes about three years to complete a generation. Adults or larger nymphs overwinter in caves, starting activities in April and May of the second year, and damaging seedlings of corn and other crops. The nymphs gradually grow into adult worms and continue to harm the corn. Overwintering adults begin to lay eggs in mid-June. Hatching at the beginning of July, initial hatching, larvae clustering, 3rd age dispersion hazard, reaching 8-9 years old in autumn, deep wintering in the soil. In the second year of winter, the nymphal recovery activity continued to be harmful, and it was wintering after 12 to 13 years of age in autumn. There is activity hazard in the third year of spring.
Grub
The cockroach is the larva of the golden tortoise shell, which is nicknamed the white worm, the walnut worm, etc. The adult is known as the golden tortoise or the chafer, which harms many plants and vegetables. According to their diet, they can be divided into three types: herbivorous, fecal, and rot. Among them, herbivorous feeding is widespread, which harms a variety of crops, cash crops and flower seedlings. It is the world that likes seeds, roots, tubers and seedlings that have just been planted. Sexual underground pests are very harmful.
Golden worm
The golden worm, also known as ironworm, iron worm, aphid, etc., is a larva of the mites, which damages the roots, stems, and organic matter of the plants. There are many kinds of tobacco. The larvae live in the soil for a long time, mainly for cereals, potatoes, beans, beets, cotton, and various vegetable and forest seedlings. They can bite the seeds that have just been sowed, and the endosperm can not be germinated if it has emerged. It can be the underground part of the roots, stems and stems, so that the seedlings die, the main roots are not neat, and they can also enter the tubers and roots.
Tiger
The ground tigers are also called cutworms, night worms, commonly known as silkworms, and silkworms. There are many types, and there are more than 10 kinds of agricultural crops causing harm. Among them, small tigers, yellow tigers, earth tigers, white tigers, and police tigers are particularly serious, all of which are larvae. Hosts and targets are cotton, corn, sorghum, millet, wheat, potato, and beans. Classes, hemp, alfalfa, tobacco, sugar beets, rapeseed, melons, and various vegetables, and the seedlings of medicinal plants, pastures, and forest nurseries are also often affected.
Root
Roots are omnivorous underground pests, mainly cotton, corn, potato, beans, melons, cruciferous vegetables, spinach, onions, garlic, etc., often drilled into seeds or seedling stems, or in the rhizome Feeding up and down, the whole plant died, resulting in lack of seedlings and ridges.
cricket
It is an important agricultural pest in Northeast China, North China, the lower reaches of the Yangtze River and South China. It destroys the roots, stems, leaves, fruits and seeds of various crops, especially for damage to seedlings. serious. It also harms corn, jute, tobacco, cotton, soybeans and cassava, often causing seedlings and affecting the harvest.
Root soil
The root scorpion is also called the wheat root scorpion, which occurs in North China, Northeast China and Inner Mongolia. It has serious damage to corn, wheat and sorghum, and also harms other grass crops, beans and tobacco. Usually, the clusters absorb the juice at the roots of the crops such as corn, so that the plants are dwarfed in the seedling stage, and the heavy ones can die in the filling stage.
Root
There are many types of root mites. Cotton root mites mainly harm cotton, kidney beans, broad beans, sweet peas, potatoes, tobacco, tomatoes, kale, turnips, beets, wheat, oats, rye, and alfalfa. Beetroot stalks are sputum, and if sputum is concentrated on the roots, it sucks juice, and the roots shrink and turn black or rot, and the plants are yellow leaves and dead tops. Root bean mash mainly harms the roots of beans, peas, broad beans, runner beans, beets, potatoes, tomatoes, kale, turnips, leeks, carrots, wheat, oats, rye, alfalfa, gladiolus, and cotton.
Plot
It is also known as the walking insect, pseudo-stepping, etc. The larva, also known as sand dive, is an agricultural pest. The adult is mainly harmful to wheat, cotton, hemp, beans, sorghum, millet, peanut, alfalfa and fruit tree seedlings. The larvae damage the newly planted seeds and the seedlings that will be unearthed, and can also bite the roots and stems of the seedlings, resulting in lack of seedlings and ridges.
termite
Termites have a wide range of foods, and their nutrients are derived from plants. Plant cellulose and its products are the main foods. Generally speaking, termites are not important pests for crops in China, but the damage to economic crops is still serious. At the same time, some termites will harm trees and destroy house buildings and river dams.
Rice root leaf
The rice root leaf beetle is also known as the rice root flower worm. The larvae are concentrated in the roots of the rice. The damaged rice plants grow slowly, the roots are black, the rice leaves are yellow, and the effective tillers and panicles are significantly reduced. The damaged rice plants are lightly picked up, and a large number of larvae and mites can be found attached to the rice roots. In addition to harming rice, it can also be used to feed a variety of aquatic plants such as scorpion, grass, lotus, long leaf diarrhea, dwarf mushroom, ragweed and eyed vegetables. Among them, kohlrabi is its important wild host.
Cane root
Cane root soil beetle is also called cane root saw beetle, cane root beetle, etc., widely distributed in Guangxi, Guangdong, Hainan and Yunnan and other major sugarcane areas, mainly larvae bite the roots and necks and main roots under the host plant soil, Lead to death of the whole plant.
Walnut root weevil
Walnut root weevil is called walnut horizontal groove image, walnut yellow spot image, etc., distributed in Henan, Shaanxi, Sichuan and Yunnan and other walnut production areas, with larvae in the roots of walnuts as the damage to the cortex, in the bottom of the gully and the fertile areas next to the village and The growing walnut trees are more harmful.
Underground pest damage characteristics
The types of occurrence vary from place to place, and are generally common in dry farming areas, especially cockroaches, cockroaches, golden worms, tigers and root lice. After the crops are damaged, the light is sluggish, the growth is slow, and the heavy dry and dead, resulting in the lack of seedlings and ridges, resulting in reduced production. Some species are larvae, and some species are adult and young (if) insects can be harmful. The mode of harm can be divided into three categories: the underground part of the plant that has been living in the soil for a long time; the nocturnal night is harmful at the near surface; the ground and underground can be harmful.
The shape of underground pests is mostly long and spindle-shaped, the body pigments are degraded, and some organs are developed or degraded. For example, the forefoot of the scorpion is specialized for digging the foot, which is suitable for excavating the soil. Some species have coleoptera or degeneration of the eye. The law of vertical activity in the soil shows obvious seasonality, mainly due to the sensitive response of underground pests to soil temperature and soil moisture. In winter and summer, the temperature and humidity conditions of the topsoil layer move to the deep layer, and the spring and autumn move from the deep layer to the topsoil layer, which is generally the seedling stage of the crop, thus providing them with sufficient food conditions.
Underground pest special medicine recommendation
Chemical dressing
Using 3911, phorate, phoxim, etc., the seed dressing amount is 0.1% to 0.3% of the weight of the seed. Specifically, it is 60% phorate, 40% methyl isoflavin is 0.2%, 50% phoxim is 0.1%, and 20% methyl isoflavin emulsifiable concentrate is 0.3%. Dissolve the agent with about 3 kg of water, then spray evenly on the seeds, mix well, and dry until half dry. Seed dressing at 0.01% to 0.1% by weight of the seed. This method can also be used for seed dressing of vegetable crops.
Poisonous soil
Use 40% lesbian to control underground pests, 15 to 20 kg per 150 ml of fine sand, or use 75% phoxim or 20% pyrethroids, etc., and mix them into toxic soil at a ratio of 1:2000. 20 to 25 kilograms per acre, applied to the vicinity of the crop.
Poison bait
Use 90% crystal trichlorfon 30 times solution, stir-fry the cornmeal, add green leaves, and sprinkle it on the ground around the crop in the evening. Or chop the fresh grass or vegetables, use 2-100kg of 50% phoxim and water to spray it on the 1000kg grass. In the evening, divide it into small piles and place the field to trap the tiger. Each acre is mixed with frying (bean cake, wheat bran, sorghum, corn, etc.) 1.5-2 kg, or 50% phoxim 50 g, or 40% methyl isothiophos 50 g plus water, mix well, in the evening Sprinkle around the rhizosphere of the field crops, the effectiveness of the tigers and cockroaches can reach 80-90%.
Spray control
Use 50% phoxim 800 times solution, spray the ground with the ridge, use 25% bi of dihydromethrin 30-40 liters and add water 75 kg for routine spraying after sunset. The stems and leaves should be sprayed and sprayed 1 or 2 times. Can effectively kill the tiger.
Pharmacy treatment soil
Use 50% phoxim emulsifiable concentrate 200-250 grams per acre, add water 10 times spray on 25 ~ 30 kilograms of fine soil and mix well to make toxic soil, apply ridges, then shallow sputum.
Underground pests are becoming more and more serious, and the incomplete destruction of the turf can be completed in a short time. Lighter affects the beauty of the lawn, and the heavy ones cause the lawn to die in large areas. With one hand, you can pick up a large lawn and see a lot of larvae on the ground that lifts the lawn. This article's underground pest species, the characteristics of underground pest damage can be helped!
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