What do you know about the application method of armyworm agents?

Adult armyworms prefer plots where moist and dense crops grow, as well as laying eggs in overgrown fields. As a result, armyworms mostly occur in densely planted, fertilized, well-irrigated, lush wheat, millet, paddy fields, or overgrown maize and sorghum fields. How to prevent and control crop pests?

Chemical control is the use of pesticides to eliminate pests and diseases, with fast effect, high efficacy, and not limited by time or region, so it is deeply loved by the majority of friends. What do you know about the application method of armyworm agents?

1) The trapping time should be determined according to the growth period and the emergence period of the pest. If the adult insect occurs at 2-3 instars, it can be trapped, and if the pest occurs above 4 instars, it should be carried out at 4-5 years old.

2) Booby-traps can be used with multi-functional boobyrapies with a wide insecticidal spectrum and a long duration of effect, such as "pyretha, phoxanthion, deltamethrin, dichlorethox, insecticidal bis, chloroform, thiophanate-methyl, aphicarb, bromofen, chloride, chlorpyramide, imidacloprid, acetamid", dichlorvos, fipronil, pyrethrin, etc. In the selection of booby-traps, the main consideration is pests, and strict standards are applied to the residue of organic matter. If it is a pest, inorganic phosphorus pesticides with low pesticide residues, such as chlorantranibenzoic acid, insecticidal thiophos, insecticidal double, etc.

3) During the oviposition period of adult insects, a variety of methods should be used to trap and kill them according to the activity habits of pests. If the adult insect likes the egg-laying moment, the odor produced by the adult egg-laying can be trapped, and the organophosphorus pesticides in the formula can effectively control the occurrence of insect pests.

4) The object of booby-trapping drugs should be considered as pests, and high-efficiency, low-toxicity and low-residue pesticides can generally be used, such as pyrethrin, phosphine, deltamethrin, chlorantraniic acid, insecticidal double, etc.

As for the pests that have already been damaged, they should be sprayed with insecticides. For pests that are not damaged, manual control can be chosen, such as insecticidal lamps, poison baits, etc.

To judge according to the specific situation, it must be targeted, and a reasonable choice should be made on the concentration of the agent.

The first point should pay attention to some colors of his entire brother's celebration when choosing, the second point should pay attention to how much you have to remember to hold him, and the third point should be selected according to the whole and word of mouth, and this oral fighting monument must be chosen well.

<> armyworms can be used to kill the enemy, kung fu emulsifiable concentrate, cypermethrin 20-30 ml, chlorpyramide and other agents**, if the insect infestation is serious, you can use cyhalothrin 40-80ml mu, 5% cyhalothrin 12-18 grams mu, 20% octadicarb emulsifiable concentrate 80-100 g mu, 48% chlorpyrifos emulsifiable concentrate 30-40ml mu, mixed with water 40-50kg evenly sprayed.

What I collected and learned in 191 agricultural resources is very comprehensive and specific, and I am willing to share it with you!

1. Act early and react quickly: respond quickly. Armyworms are swarm gluttonous pests, and if they don't come, they will eat quickly in large numbers.

Therefore, the prevention and control of armyworms should act quickly, see the insects with drugs, and try to use fast-acting insecticides. Slow-acting insecticides such as chlorantraniliprole, pyrethuron, and hydrazine are best not to be used at this time, at least not alone;

2. Be accurate and ruthless in drug selection: When armyworm larvae are found, it is best to choose fast-acting insecticides to spray, such as kung fu pyrethrin + emamectin benzoate, flubellura + cypermethrin, etc. However, these agents are basically based on contact killing and stomach poisoning, and when spraying, they need to be sprayed to the location where armyworms inhabit and move.

But at this time, the corn has grown very tall, and the ordinary knapsack sprayer is definitely not good, so it is best to choose a self-propelled high-pole sprayer, or a mobile high-pressure sprayer with a long spraying line. Corn fields with large planting areas can be sprayed by drones, but it is necessary to consider whether the agent can settle enough to the armyworm in the middle of the corn, and the insecticide with good fumigation should be selected and mixed with the above agents, such as malathion, phosphine, etc., and the dosage form of the agent should also be screened.

3. All-round spraying: Armyworms have the habit of falling to the ground in fright. Therefore, when spraying, we should also pay attention to spraying the surface to eliminate the "leaky" insects that fall on the ground. At the same time, it is necessary to spray weeds along the side of the road to eliminate the "extralegal insects" that inhabit the area.

(1) Spray prevention and control.

Before the 3rd instar, corn armyworm was sprayed with 15 45 grams of 20% pyrethrin EC, 50 kg of water, or 1000 1500 times of 5% deltamethrin EC, 1500 2000 times of 40% dimethoate EC, 500 600 times of 40% hydroamidophos EC, 800 times of 5% cypermethrin EC, 10% Avi? 1000 times of high-chlorine EC, 1000 1500 times of deltamethrin EC, 1000 1500 times of cyhalothrin microemulsion, 21% malathion? Fenvalerate EC 1000 times spray.

2) Sprinkle granules.

3% carbofuran granules, dosage per mu 1 2 kg.

When there are 20 30 armyworm larvae in 100 plants at the seedling stage of corn, sorghum and other crops, or 50 100 larvae in 100 plants in the middle and late stages of growth, pesticides should be applied to control them.

Before the 3rd instar of armyworm larvae, 15 30 grams of the active ingredient of chlorpyramide 1 or 5 10 grams of the active ingredient of chlorpyramide 3 were used per hectare, and the field effect period could reach 20 days after adding water for constant spraying or ultra-low volume spraying. It can also be sprayed evenly with 90% trichlorfon 1000 times liquid or 80% dichlorvos 1000 times liquid, or 50% phoxanthion emulsifiable concentrate 1500 times, or 25% oxocyanide emulsifiable concentrate 2000 times.

Powder spraying control: trichlorfon powder per hectare kilogram; 5% marathon powder kg per hectare.

Spray control: deltamethrin emulsifiable concentrate mixed with water 500 times spray; 20% rapid dimethrin or pyrethrin mixed with water 500 times spray; 50% methamidophos mixed with water 1500 times spray.

Early control: Insect growth regulators can be used to control young armyworm larvae to reduce pesticide pollution and protect natural enemies. 50-75 ml of 5% fiproniride (Ka Ke) EC can be used per mu, or 30-40 ml of 25% chlorfenclamide suspension, or 5-10 ml of 20% pyrethuron suspension, and 50 kg of water can be sprayed evenly.

Standard control: When the insect population density reaches the control index, pesticide control should be carried out immediately. 50% phosphine EC, dichlorvos EC, 40% chlorpyrifos (Lesben) EC 75-100 ml per mu can be used, or 50 ml of cypermethrin EC + 50 ml of dichlorvos EC can be used, and 50 kg of water is evenly sprayed.

When applying pesticides, it should be before 9 a.m. or after 5 p.m. on a sunny day, and should be sprayed in time in case of rain, and the spray should be uniform and thoughtful, and the weeds in the field and roadside should be sprayed. Wear protective clothing and masks when spraying to prevent poisoning.

Control technology.

1) Trapping adult insects. When the number of adults in the field began to rise, 15 hm2 of sweet and sour wine booby traps were set up in the field, or 30-45 hm2 of poplar branches or grain grass were set up to trap and kill adults day by day, which could reduce the number of eggs and larval density in the field.

2) Egg induction and egg collection. Since the early stage of oviposition of adults in the field, 150 hm2 eggs are planted in the wheat field, and the straw is taken away from the field and burned. In the peak egg stage, the eggs can be collected along the ridge for 3-4 times in a row, which can significantly reduce the insect population density in the field.

3) Pharmaceutical prevention and control. There are many types of chemicals used to control armyworms. Commonly used agents are 90% crystal trichlorfon 1000 times, 80% dichlorvos EC 1500 times (these two drugs are forbidden for sorghum), 50% pine moth EC 1000 times, 48% Le period EC 1500 times, 50% phoxanthion EC 1500 times, 25% bromopermethrin EC 2000-3000 times, 30% 2000-3000 times EC, 2000-3000 times Kung Fu pyrethrin EC 2000-3000 times, 25% Insecticide No. 3 EC 1000 times, 5% Taibao EC 2000 times, spray.

75-100 grams of 50% zinc sulfur emulsifiable concentrate, or 75-100 grams of 40% chlorpyrifos (Lesben) emulsifiable concentrate, or 500-1000 times of 20% chlorpyrifolia No. 3 suspension, 40 kg of water is evenly sprayed.

New pesticides such as chlorfenapyr, avi chloride, avi chlorpyrifos, and toxin can be.

Main technical measures.

1.Adult trapping techniques. (1) Insecticidal lamp method.

During the adult occurrence period, insecticidal lamps are placed in the field, with a distance of 100 meters, and the lights are turned on at night to trap and kill adults. (2) Sexual entrapment. Use a dry trap equipped with a sticky insect trap, and hang one rod per mu in the field to trap and kill adults.

2.Larval control techniques. Pay attention to the timely prevention and control of weeds in the field, and apply pesticides before the larvae are 3rd instar.

1) Biological pesticides: spray Bacillus thuringiensis (BT) preparations at the peak hatching period of armyworm eggs, pay attention to the fields near the mulberry orchard can not be used, and young larvae can be used to kill larvae. (2) Chemical pesticides:

When the population density of wheat or rice field reaches more than 20 square meters, the population density of corn field reaches 10 heads and 100 plants in the second generation and 50 plants in the third generation, it can be sprayed with insecticides such as phosphine, chlorpyrifos and trichlorfon.

3.Lockdown isolation technology. When the armyworm larvae migrate to harm, a deep ditch can be dug on the road where it is transferred, and the armyworm that falls into the ditch can be treated intensively to prevent it from continuing to migrate; or sprinkle a 15 cm wide strip to block; Or in wheat and corn fields, phosphine poisoned soil can be sprinkled to establish a separation zone.

4.Protect against natural enemy technology. Release red-eyed bees or ridges to plant flowering plants such as sesame and soybeans, and protect and use natural enemies such as spiders, parasitic wasps, and frogs to control armyworms.

Some armyworm predators can be stocked.