Special control methods of Spodoptera exigua in corn field

Special control measures 1, ridge cultivation cleaning and control of Noctuidae in maize field. Remove wheat orange accumulated in corn root, improve ventilation and light transmission conditions of corn roots, and eliminate that habitat environment of Spodoptera litura.

2. Poison bait control. Use 150ml of 48% chlorpyrifos emulsifiable concentrate or 200ml of 30% acephate emulsifiable concentrate +200ml of 80% dichlorvos emulsifiable concentrate +4kg of chopped Chinese cabbage leaves (or weeds)+10kg of fried wheat bran, add water until it can be held into a ball, and place a small pile along the ridge in the evening (3.

3. Prevention and control of toxic soil. The toxic soil made of methyl isofenphos EC and chlorpyrifos EC according to the ratio of 1: 100 (medicine: soil) should be evenly spread around the roots of corn after ridge cleaning, but a certain distance should be kept from the corn seedlings.

4. Root irrigation control. 1500 times of methyl isofenphos emulsion, remove the sprayer nozzle, and directly aim the spray rod at the base of corn to directly poison the mature larvae.

5. Combined water irrigation. The plots that need to be watered can be prevented by whole field irrigation. Use 40% phoxim EC 1250ml+48% chlorpyrifos EC 250ml per mu, and irrigate the field with water by ridge head drip irrigation.

When controlling Spodoptera litura in corn fields sprayed with herbicides, if organophosphorus pesticides are used, the interval should be more than 7 days to prevent phytotoxicity.

What is the specific medicine for controlling weeds in corn field? At present, there is no special herbicide for this. But when he waited for the freshman year of corn. Paraquat can be used. That medicine will be particularly effective if sprayed once.

How to prevent pheasants in corn fields? If it is too much, it is simple and quick to put some rat poison, or try to capture live domestication, which can also increase economic income. The simpler way is to soak the beans in wine, then put them in the ground and see them the next morning. If the beans are eaten, look around and you can catch them.

How to prevent and control moles in corn field ① Strengthen field management, intertillage and weed, and eliminate eggs; (2) luring and killing adults with black light or sweet and sour venom; ③ Trapping and killing with poison valley and poison erbium; ④ Use 50% phoxim emulsion 1000 times of furrow application or irrigation, or use 5% granular soil application, about 2kg per mu.

Prevention and cure method

The application of fully decomposed organic fertilizer can reduce the egg production of crickets. Before making the seedbed, 375 kilograms of 50% phoxim granules were mixed with fine soil per hectare and stirred on the soil surface to make it become soil. Seed dressing with 0.3 kg of 50% phoxim EC can control many underground pests without affecting the germination rate. Poison bait trapping and killing: 90% trichlorfon original drug 1 kg plus poison bait 100 kg, mixed evenly and spread on the seedbed, which can not only cure rodents, but also white grubs and cutworms. Light trapping and killing: generally in hot weather, black light is used to trap and kill at 8~ 10 in the evening.

How to control snails in corn fields can be achieved by spraying lime powder or smearing 8% mirex particles around.

Sprinkle some salt or baking soda where snails often appear. When the snail's mucus sticks, it will dehydrate the snail and die.

Is this ok?

What medicine does corn borer use to prevent this? Ask the person who bought the medicine.

Control of two-point leafhopper in corn field? First, prevent and control adults from depressing insect sources.

It is a simple and easy method to prevent Spodoptera litura adults from laying eggs in the field and effectively reduce the number of larvae. After wheat harvest in mid-June, the first generation of Spodoptera litura adults occurred at the peak of maize sowing date. Pesticides with contact and fumigation effects can be sprayed, such as 48% chlorpyrifos EC 800- 1000 times, 30% acephate EC 600 times, or 80% dichlorvos EC 1000-65438+. In order to improve the ovicidal effect, 10% chlorhexidine EC can be made into 2000 times solution. Early control can be achieved by soil sealing combined with chemical weeding. Areas with conditions can give priority to pollution-free prevention and control technologies such as insecticidal lamps and sex pheromones.

The second is to control larvae early and improve the control efficiency.

The 2nd instar larvae are very sensitive to chemicals, and the individual is small, only 0.5cm, and the pests are under the plastic film between corn ridges. At this time, the harm of corn is not obvious. At this stage, spraying method can be used for prevention and control. The pesticide can be any one of 50% phoxim EC 1000 times, 20% chlorantraniliprole SC 4500 times, 80% dichlorvos EC 1000 times, 48% chlorpyrifos EC 1200 times, etc. 45 kilograms of liquid medicine per mu.

Third, medium-term prevention and control of hazards.

When the larvae enter the third instar, the food intake and drug resistance increase obviously, and the harm will increase rapidly. Pests have concentrated around the roots of maize seedlings, and began to bite and eat away at the base of maize stems, causing the heart leaves of maize seedlings to wither until the whole plant died. According to the experiment, the control effect of poison bait and poison soil is obviously better than other control methods.

The bait can be 48% chlorpyrifos EC 150ml or 80% dichlorvos EC 200ml. After adding a proper amount of water, 5 kg of fried wheat bran or 48% chlorpyrifos EC 100ml+80% dichlorvos EC 150ml+ chopped Chinese cabbage leaves (or weeds) +5 can be evenly mixed. In the evening, spread a small pile about 5cm away from the corn seedling and smear it around the stem base of the corn seedling. Wheat straw mulch is slightly more, and generally the harmful seedling rate will not increase the next day.

For toxic soil, 300ml~500mL of 80% dichlorvos EC, 300ml ~ 500mL of 48% chlorpyrifos EC or 500mL of 30% toxaphene microcapsule suspension agent can be used per mu, and 25kg of fine soil can be evenly prepared with appropriate amount of water and sprayed along the ridge in the morning.

Fourth, emergency prevention and control to reduce losses.

Due to the failure of farmers to take the above measures in time, the larvae of 4 years old and above will be seriously harmed in some plots. At this time, the larval body length has reached more than 1 cm, and it is in the gluttony period and has the habit of harming plants. A large number of pests eat the stem base of corn, bite corn for secondary rooting, and the seedling death rate and lodging rate in the field increase rapidly. Therefore, emergency prevention and control measures should be taken immediately to prevent and control larvae through whole field irrigation. (1) Spraying corn root circumference: unscrew the spinneret of the sprayer or spray along the ridge at the base of corn seedling stem with a straight nozzle. The pesticide can be 1500 times of 48% chlorpyrifos EC or 1000 times of 30% acephate EC. (2) Irrigation with water. Use 800 ml of 48% chlorpyrifos EC or 500 ml of 50% phoxim EC+300 ml of 48% chlorpyrifos EC per mu. Dilute the selected chemicals twice, put them into coke bottles, and put them at the water outlet of a well with an infusion tube device. Mix the liquid medicine with irrigation water evenly and pour it into the ground.

How to prevent and control phytotoxicity in maize field when planting purple leaf plum? Planting purple leaf plum in corn field and covering it with plastic film can prevent and control phytotoxicity in corn field.

How can two wilting moths in the corn field not be killed with efficient chlorine green? Spodoptera litura, a new pest of corn, is similar to tiger, which is easy to cause confusion. During prevention and control, baits such as chlorpyrifos and trichlorfon can be mixed and released in the evening. Or dichlorvos mixed with poisonous soil. It can also be controlled by spraying high chlorine emamectin benzoate, Kung Fu, acephate and chlorpyrifos. Timely removal of straw and weeds in the field can effectively reduce the occurrence of pests. The above suggestions are for reference only and I hope they will be useful to you.