How to treat corn insects in wheat seedlings?

1, plough the land before the treatment of the soil, underground pests occur more serious plots, after the harvest of the crops, the organic fertilizer, fertilizer evenly spread, then use wheat bran or cornmeal, fried fragrant crushed bean cake 2 3 kg, mix 500 ml of phosphine with an appropriate amount of water, mix well with cornmeal or bran, sprinkle an acre of land, and then plough the land, after the land is deeply ploughed, each mu of land is then used avermectin granules, about two kilograms of evenly spread, with a rotary tiller after the cultivation can be carried out furrowing, Choose the right time to sow wheat, so that after treatment, the damage of underground pests can be effectively reduced.

In addition, if it coincides with the dry weather, it is necessary to water and create moisture, for the plots where the underground pest mole crickets are more serious, you can use 500 ml of cis-cypermethrin mixed with 20 30 kg of water before watering, spray evenly on the ground, and then water immediately, so that most of the mole crickets can be drilled out of the ground and killed.

2. Seed dressing, wheat seeds are the most vulnerable to pests after sowing without pesticide treatment. At present, the most commonly used is to coat wheat seeds, and there are many kinds of pesticides, fungicides, and seed coatings for wheat seed dressing, such as 30% thiamethoxam suspension seed coating, Fumei double seed coating, imidacloprid seed coating, phoxant, etc., which can be used on demand. In order to gain sowing time, some growers do not care about the wheat seeding, so they rush to sow seeds, thinking that sowing more wheat seeds, even if the underground pests harm is not harmful.

This is clearly wrong. The loss of the most intimate protection of wheat seeds is tantamount to opening the door to underground pests and not dressing wheat seeds, which is obviously improper.

3. Post-seedling control, after the above two lines of defense, if the underground pests are right, the wheat seedlings still cause harm. Or because there is no advance prevention and control of underground pests when ploughing, after the wheat seedlings emerge, it is found that the wheat seedlings harmed by pests appear yellow, and the wheat seedlings are found to be plucked by hand and found that the root system has been bitten off by underground pests. The preparation method of poison bait is to put soybean cake or wheat bran in an iron pot and fry until fragrant, and then add about 30 kg of fried spices, 100 ml of phosphine + 3 kg of water to mix evenly, mix into poison bait and evenly sprinkle one acre of land.

When the wheat needs to be watered with winter water, chlorpyrifos can be flushed with 300 500 ml per mu. ”

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Corn insect pests, corn borer, armyworms, can be sprayed in the morning or evening.

Hello, the insect pests of corn are mainly corn borer, corn armyworm (belonging to lepidopteran pests), aphids, red spiders, etc., and underground pests are ground tigers, grubs, etc.

Underground pests can be sprinkled with phoxanthion granules, or corn can be mixed with imidacloprid seed dressing.

Aphids can dichlorvos emulsifiable concentrate, imidacloprid, thiamethoxam, etc. Corn borer and armyworm can use Bacillus thuringiensis + emamectin salt, or perchlorine-emamectin salt, Kangkuan, etc. Spider mites can use avididoxin, bifenspirofenoxil, Baozhuo and other agents.

1.The main pests of corn seedlings are armyworm, Spodoptera exigua, thrips, wheat straw fly, etc. Pesticides such as cypermethrin, phosphine, and dichlorvos can be sprayed at the 2-3 leaf stage of corn for control.

When spraying, wheat straw and weeds in the field should also be sprayed once to completely kill the source of insects; 2.The main disease of corn seedling stage is coarse shrinkage disease, which can be controlled with seed coating agent containing systemic insecticide or corn seed dressing agent before sowing, and then sprayed pymetrozine and thiamethoxam at seedling stage. The underground pests that are seriously harmful to corn at the seedling stage include mole crickets, grubs, ground tigers, needleworms, etc.

Once it happens, it is necessary to treat the symptoms and eliminate them in time. Prevention and control methods: irrigation solution, 50% kg of phosphine emulsifiable concentrate per hectare, watering 750 kg along the ridge.

Corn pests at the seedling stage include armyworm, thrips, Mongolian gray weevil, black velvet beetle, net latent sand, etc. The control of armyworm can be sprayed with 50% phoxanthion emulsion 3000 times; Spray thrips with 40% dimethoate emulsion or 50% dichlorvos emulsion diluted 1500 times, respectively; Spraying dimethoate and pyrethroid pesticides can also kill aphids, planthoppers and other poisonous insects, thereby preventing viral diseases. At the peak of thrips and gray planthoppers, the town wheel can be sprayed with 10% imidacloprid wettable powder 3000 times liquid spray control.

Corn borer can be irrigated with 90% crystalline trichlorfon and 80% dichlorvos emulsifiable concentrate, with 200 kg of medicinal solution per hectare. Corn heartworms can be mixed with naphthalene carb wettable powder, 15 30 kg per hectare, mixed with fine soil, 300 kg, stirred evenly, sprinkled around the corn roots, killing the transferred larvae; 50% phosphine EC, 50% malathion EC and 35% phoxanthion EC can be used to control brown ash moths at 750 kg per hectare.

In the sowing period of sowing too deep soil, soil compaction has caused the phenomenon that it is very difficult for the seedling to top chain the soil, resulting in uneven growth of seedlings, easy to be attacked by insects, there is no regular and quantitative drug, it is easy to make corn seedlings breed more insect pests, apply some farm fertilizer can effectively increase the resistance of plants, and prune dead branches and diseased branches frequently to prevent the spread of insects.

Causes of insects growing in corn seedlings.

Improper sowing depth: In the soil that is sown too deep during the sowing period, the soil compaction causes the phenomenon that the top soil of the seedlings is very difficult, resulting in uneven growth of the seedlings and is easily attacked by insects.

Do not put herbs: Sudden drop in temperature or drought may also lead to poor growth of corn seedlings, low insect resistance, and breeding of insects.

Corn seedlings grow insect solution.

Agricultural control: Applying some farm fertilizer can effectively increase the resistance of the plant, and prune dead and diseased branches frequently to prevent the spread of insects.

Biological control: Keeping some animals in the yard will prevent some pests.

Pharmaceutical prevention and control: After understanding the condition, be familiar with the characteristics of the bug, and choose the corresponding anthelmintic agent for the type of bug.

How to prevent worms from growing in corn seedlings.

1.It is best to choose deep and fertile soil for sowing at the time of sowing to ensure sufficient nutrients.

2.Try to keep the temperature as low as possible, if you can ensure that the temperature is not higher than 18 degrees, the pest will not grow.

3.Fumigation with aluminum phosphide can kill insects, and low-dose storage can prevent pest breeding.

The corn seedlings are wide and wide, and the general field is mainly used to fight thiamethoxam and insect treatment, and it also has a very good effect on the protection of corn.

Thiamethoxam is a new structure of Yunliang's second-generation nicotinoid high-efficiency and low-toxicity insecticide, which has stomach toxicity, contact killing and systemic activity against pests, and is used for foliar spraying and soil root irrigation treatment. It is quickly absorbed after application and transmitted to all parts of the plant, and has a good control effect on stinging and sucking pests such as aphids, planthoppers, leafhoppers, whiteflies, etc.

<> can be controlled by chemical control, agricultural control, manual hunting and other methods to control corn seedling underground pests. Among them, there are generally three pest control methods in chemical control methods: spraying and killing, sprinkling poisonous soil, and soil treatment; Pesticide control is mainly carried out through irrigation and deep tillage, which can control underground pests; The manual killing method can directly pick up the soil to catch insects, or catch insects after watering, and the effect of controlling underground pests is better.

1. Chemical control

1. Spraying and killing: Deltamethrin, 20 fenvalerate 3000 times liquid, 50 octathion 800 times liquid for ground spraying, etc., can control needleworms, grubs, ground tigers, mole crickets and other underground pests; To control tigers, you can also use 30-40 ml of emulsifiable concentrate to kill the enemy, spray 75 kg of water in the evening, spray 1-2 times, pay attention to the stems and leaves to spray wet. Chunpichai.

2. Sprinkle poisonous soil: you can use 50 kg of chopping type 50 phosphine to mix 50-60 kg of fine soil, and then evenly sprinkle it around corn seedlings, which can control a variety of underground pests.

3. Soil treatment: You can use 100 ml of 50 phosphine emulsion, mix 15-25 kg of fine slag, sprinkle it on the ground before ploughing the land, and then rake it into the ground to prevent and control grubs, needleworms and other underground pests.

2. Agricultural prevention and control

Carry out deep ploughing at the same time of irrigation before spring sowing, and then remove the weeds on the edge of the field to reduce the number of insect population and the breeding place of eggs, and change the soil temperature and humidity, which can make the mortality rate of pests reach more than 90; Reasonable crop rotation can effectively kill underground pests and reduce the number of insect sources.

3. Artificial killing

At the corn seedling stage, irrigating near the bitten plant, the larvae will be forced to crawl out of the soil surface, and then they can be captured, or the soil at the rhizosphere of the corn seedling can be picked up to catch pests directly, which has the effect of reducing the number of pests.

Summary. When corn has just emerged, it is susceptible to underground pests and affects the healthy growth of seedlings. For the control of underground pests, the following measures can be taken:

1.Deep ploughing. Before sowing in the spring or after harvesting in the fall, deep tillage is carried out to loosen the soil deeply, promote soil aeration, drainage, maintain moisture, and reduce the breeding and reproduction of underground pests in the soil.

2.Rotary tillage. Divide the corn field into small plots and then plow it at different times, so that the underground pests in the soil cannot adapt to the new environment, so that it can be controlled.

3.Use of pesticides. Effective pesticide spraying can be used, such as oxymethoate, chlorothalonil, etc., but attention should be paid to the use method and dosage to prevent damage to corn and environmental pollution.

4.Manual capture. Taking advantage of the frequent activities of underground pests in the seedling stage of maize, the underground pests can be captured and removed by manual capture.

When the corn first emerges, it is easy to be harmed by underground pests, which affects the healthy growth of seedlings. For the control of underground pests, the following measures can be taken:1

Deep ploughing. Before sowing in spring or after harvest in autumn, deep tillage is carried out to loosen the soil deeply, promote soil aeration, drainage, maintain humidity, and reduce the breeding and reproduction of underground pests in soil deficit soil. 2.

Rotary tillage. Divide the corn field into small plots and then plow it at different times, so that the underground pests in the soil cannot adapt to the new environment, so that it can be controlled. 3.

Use of pesticides. Effective pesticide spraying can be used, such as oxymethoate, chlorothalonil, etc., but attention should be paid to the use method and dosage to prevent damage to corn and environmental pollution. 4.

Manual capture. Taking advantage of the characteristics of frequent underground pest activities at the seedling stage of corn, the underground pests can be captured and removed by manual capture.

In short, in order to scientifically and rationally control underground pests and improve the yield and quality of corn, it is also necessary to pay attention to the selection of appropriate varieties, fertilizer and water management, and pest control technology. <>