What grasses does needleworm mainly damage to pastures?

The larvae of needleworm live in the soil for a long time, mainly for cereals, potatoes, beans, sugar beets, cotton, various vegetables and forest seedlings. The larvae can bite the seeds that have just been sown, eat the endosperm so that it cannot germinate, and if the seedlings have emerged, they can damage the fibrous roots, taproots and underground parts of the stem, so that the seedlings die. The damage part of the taproot is not neat, and it can also borer into the tuber and root.

The main methods of agricultural control are rational fertilization, intensive cultivation, soil turning, reasonable intercropping or intercropping, and crop rotation and stubble. The tillage method should be suitable, untreated raw manure can not be used, and timely irrigation can play a temporary role in relieving the activity pattern of underground pests. The effect of soil moisture content on the population of major underground pests was not obvious.

Chemical control is one of the most effective and rapid methods to control pests, and the main way to control needleworm at home and abroad depends on chemical control. However, the depth of activity of needleworm in the soil varies greatly. It is difficult for pesticides to play an ideal insecticidal effect when applied to soil, and it is easy to cause environmental pollution and endanger food safety, so the screening and application methods of pesticides are the key to chemical control.

The agent can be selected: Feidilong 168, the control of pests and diseases has a lasting killing effect on grubs, mole crickets, needleworms, ground tigers, ground maggots and other underground pests.

Needleworm is a common name for the larvae of Percussion (Coleoptera), which is widely distributed all over the world, harming wheat, corn and other crops, as well as forests, Chinese medicinal materials and pastures, etc., mostly feeding on the underground part of plants, and is an extremely important underground pest. The topsoil temperature in spring and autumn is suitable for the activity of needleworm, which rises to the topsoil layer and forms two peak hazards. In summer and winter, it moves downward to overwinter the summer.

If the soil temperature is suitable, the damage time will be prolonged. Soil temperature is an important factor affecting the damage of needle worm. The rain in spring is suitable, the soil moisture is good, the harm is aggravated, the rain is less in spring, the harm is light, and it is not conducive to the emergence of adults and mating and egg laying. Autumn rains are abundant and soil moisture is good, which is conducive to pupation and feathering of mature larvae.

The harm to the plants is that it will affect their growth, it will make their growth rate very slow, and it will also make the leaves yellow, so they will wither quickly, and it will also affect their roots, and there is no way to grow.

Needleworm harms wheat, corn, sorghum, potato, etc., bites seeds, germs, rhizomes, and is characterized by small holes and wounds on the rhizomes, resulting in dead seedlings and lack of seedlings or causing tuber rot.

It may cause wilting, or lack of seedlings and broken ridges, and will take seeds to remove young teeth. As well as the roots of vegetable seedlings, or the burrows on them have great harm, so it is necessary to get rid of such pests.

Needleworm is an omnivorous pest, mainly harming crops such as wheat, generally in the spring after the soil thaws to begin to move, when the Chuanbei leaf to the flowering period is also needleworm, the most serious damage, will generally be bitten into a gap, burrow into the bulb or above-ground stem, will let the plant conduction tissue be cut off, and then will be infected with other germs to let it rot, and finally die.

It will cause the plant to die, and at the same time, it will also rot, or it will directly affect the yield of the plant, which may make the plant appear leaf yellow, the root wilt, affect the growth of seedling plants, and so on.

It will cause some damage to plants, the most important thing is that it can affect the yield, and in the process it will cause great damage to the leaves and roots, so it is necessary to spray pesticides.

It will harm the plant, and it will destroy the development of the plant, and the plant will also die, and the appearance of the plant will wither, and it will also dry up very much.

Needleworm, also known as arthropodia, is classified in many ways, what is the harm of needleworm? How to prevent needleworm? What is the medicine for needleworm? Let's find out together.

The harm of needleworm is a kind of underground pest, the body shape is slender and slightly flattened, the body wall is hard, golden or brown, and shiny, so the name "needleworm", the adult is a kowtow worm, belonging to the order Coleoptera.

The larvae of needleworm bite wheat, damage the newly germinated seeds, and irritate the roots of seedlings, and the damage is not completely bitten, and the fracture is uneven and torn.

Needleworm living habitsNeedleworm generally lives in plots where straw is not well reproduced and extensively managed, and adults or larvae overwinter in the soil.

Needleworm completes the first generation in 2-3 years, and the damage is serious in the wheat seedling stage after autumn and the regreening stage in spring, especially in early spring.

The activity of needleworm in the soil is greatly affected by temperature and humidity conditions, and the vertical movement is done according to the change of soil temperature and humidity, when the temperature of the 10cm deep soil layer is 6, it is done to rise movement, and the soil temperature reaches 10 20 when it can seriously harm the seeds and seedlings.

Heavy rain in spring is aggravated.

Needleworm control methods create an environment that is not conducive to the activity of needleworm.

Before planting, it is necessary to plough and rake deeply, and turn it deep in time after harvesting; Ploughing and exposure to the sun in summer, especially after wheat harvest, can kill some pests, and use the phototaxis of the adult needleworm to set up insecticidal lamps in the field to trap and kill the adult insects during the adult occurrence period.

Needleworm can be used to mix seeds, sprinkle poisonous soil and irrigate roots.

40% methylisochloride chlorpyrifos emulsifiable concentrate and 48% chlorpyrifos (Lesben) can be used for seed dressing; Soil treatment can be 20% methyl isosulfonate emulsifiable concentrate 200 250 grams per mu, 5% phosphine granules per mu kilograms, mixed with fine soil 25 kilograms before sowing to spread cultivated land or along the ridges; Before winter and wheat regreening stage, when it is found that needleworm is a pest and causes dead seedlings, it is necessary to irrigate the roots as soon as possible.

It can be prepared with 40% phosphine 100 150 ml mixed with water 50 75 kg.

Therefore, the screening and application of pesticides at this time is the key to chemical control.

At present, chemical pesticides are often used in soil treatment, pesticide seed dressing, root irrigation, sprinkling of toxic soil, ground application, plant dusting, poisonous soil (bait), smearing stems, etc. to control underground pests.