What is the best pesticide for rice planthoppers?

Idylpyritrazine + thiamethoxam conjoined combination set for the four seasons, I personally recommend you try it.

There are many pesticides that can be used, such as thiazinone, isoprocarb, imidacloprid, chlorpyrifos, insecticidal mono, acemethamidophos, etethhrin, thiamethoxam and so on.

Dimethoxamin, pymetrozine, chlorpyrifos, acetamonil.

Pymetrozine is better!

It is effective for eggs, if, and adults, and has a long duration of effect! But the effect is a little slower, and you can use a little fast-acting pesticides!

When applying pesticides, the amount of water should be increased, and there should be a water layer in the field!

The medicines used for rice planthopper are: chlorpyrifosImidacloprid, thiamethoxam, etc

1. Chlorpyrifos

Chlorpyrifos is a high-efficiency, poisoning broad-spectrum organophosphorus insecticide and acaricide, which has strong contact killing, stomach toxicity and fumigation effects on pests, and is a cholinesterase inhibitor.

It is suitable for the prevention and control of a variety of chewing mouthparts and sucking mouthparts pests on rice, wheat, cotton, vegetables, fruit trees and other crops.

The residue period of the pesticide on the leaves is not long, but the residue period in the soil is long, and the control effect on underground pests is good. The drug cannot be mixed with alkaline pesticides.

2. Imidacloprid

Imidacloprid has good systemic properties, can act on the nerves of planthoppers, and has multiple effects such as contact killing, stomach toxicity and systemic absorption, and controls rice planthoppers.

The effect is good, and ** is not expensive, if you buy it zero, a pack will be a few dollars smaller, however, in some areas, the resistance of planthoppers to imidacloprid increases, which should be paid attention to, if the effect is not strong, you can consider changing the dressing.

3. Thiaproxam

The insecticidal spectrum of thiamethoxam is very extensive, and there are many forms of pesticide application, such as spraying, seed dressing, soil treatment, etc., from the perspective of safety, it is also more applicable, but it should also be noted that the insecticidal activity of thiamethoxam is high, and the dosage should not be increased privately under the premise of uncertainty about the dosage.

According to monitoring, the high temperature from July to August has an inhibitory effect on the gray planthopper, and the reproduction is accelerated after the weather turns cool in September, and the appropriate period for the control of gray planthopper is about 7 days after heading (mid to late September). It is recommended that pymetrozine be used in production.

with chlorpyrifos, dichlorvos.

and so on to delay drug resistance.

Produce. In the year when the planthopper occurs in large numbers, chlorpyrifos or dichlorvos can be mixed with pymetrozine to enhance the rapidity and durability. 25% pymetrozine wettable powder to control gray planthopper at the late rice panicle stage, 20 grams per mu and 50 kg of water were sprayed.

Harmful symptoms of rice planthopper:

Adult nymphs. In recent years, it has been found that the damage to the panicle of rice in some rice areas is also more serious, when the insect mouth is large, the sap of the rice plant is lost and yellowed, and at the same time, a large amount of honeydew is sprinkled on the nearby leaves or ears and breeds mold.

However, symptoms such as "lice fever" and "puncture" similar to brown planthoppers and white-backed planthoppers are rare. Planthopper is a vector for the transmission of striped leaf blight and other rice virus diseases, and the harm caused by it is often higher than that caused by direct ingestion, and the affected strains show corresponding disease characteristics.

Rice planthoppers can use pesticides such as leafhopper powder, imidacloprid, thiamethoxam, acemethamidophos, fipronil and so on. Use medication appropriately according to the severity of the injury, and do not overdose.

Key points of rice planthopper control:

1) Scientific water management. Achieve free drainage and irrigation, prevent long-term water accumulation in the field, shallow water irrigation, and timely roasting of the field; Make the field ventilated and transmitted, reduce the humidity in the field, and prevent the growth of rice.

2) Reasonable layout. It is necessary to make a rational layout for rice planting, and implement continuous planting to prevent rice planthoppers from migrating back and forth and causing harm. Create environmental conditions that are conducive to the growth and development of rice and not conducive to the occurrence of rice planthoppers.

3) Scientific fertilization. Fertilization should be done to control nitrogen, increase potassium and supplement phosphorus; Prevent partial nitrogen from causing shade in the field.

4) Protection and utilization of natural predators. For example, to reduce pesticides that are highly toxic and have a killing effect on natural enemies such as methamidophos, use selective agents, adjust the medication time, and reduce the number of medications, so as to avoid killing natural enemies in large quantities and play a role in controlling natural enemies.

What pesticides are used and how to use rice planthoppers, listen to what experts say.

Leafhopper powder, imidacloprid and dichlorvos all have good control effects on rice planthoppers. In addition, chlorpyrifos, thiazinone, Ruijinte, thiamethoxam, acemethamidophos, fipronil and carbamate pesticides isoprocarb, carbosulfan and other pesticides are also effective agents for the prevention and control of rice planthoppers. The combination of these drugs significantly improves the prevention efficacy, which is much better than the use of a single dose.

Avermectin emamectin benzoate, pyrethroid pesticides.

Imidacloprid, chlorpyrifos, cyhalothrin, isoprocarb and other pesticides can control rice planthoppers, and it is recommended to choose the first two types of drugs mixed with dichlorvos for rotation, and the effect is good.

Pymetrozine, thiazinone, chlorpyrifos. Prevention is the first two, such as rice planthoppers, mix them. It is best to add 70% imidacloprid for prophylaxis and quick killing.

If the rice planthopper is particularly serious, use dichlorvos and chlorpyrifos to mix soil in the afternoon, and the next day use pymetrozine and chlorpyrifos to hit at least two buckets of water once, so that one mu costs about 40 yuan. By the way, it is best not to spray the ear of grain before it is full, it is best not to spray it with dichlorvos, the amount of medicine is light, there is no effect, and the heavy will lead to the burning of buds and the reduction of yield. . .

1. Trifluorophenylpyrine.

Trifluorophenylpyrimidine is the latest pyrimidine ketone compound developed by DuPont, which is a new type of insecticide, which has the characteristics of broad-spectrum, systemic absorption, high efficiency, long-lasting effect, and slightly toxic, and has a good control effect on a variety of pests such as lepidoptera and homoptera, and has outstanding effects on the prevention and control of rice planthoppers and leafhoppers.

To control rice planthoppers, from the tillering stage of rice to the spike differentiation stage, use 10% suspension agent per mu, mix with 40-50 kg of water, evenly spray the foliage, and the control effect is up to 21 days after the drug, and the control effect is still maintained above.

2. Dimethoxam.

Fendimidam is a new nicotinoid insecticide, mainly acting on the nervous system of insects, which will lead to paralysis and death of insects, and the insecticidal spectrum of dimethofenidin is wider, and has a good control effect on stinging and sucking pests such as rice planthoppers, aphids, thrips, whiteflies, leafhoppers, pear psyllids, etc., and is used to control rice planthoppers.

The use of dinotefuran to control rice planthoppers should be mastered in the peak period of nymph incubation to the peak period of young nymphs, you can use 100 ml of 10% dinotefuran aqueous solution per mu, keep the water layer at 3-5 cm when using the drug, and keep the water layer for 5-7 days after spraying. Since the rice planthopper is in the middle and lower part of the rice plant, the spray should be done with sufficient water in the middle and late stages of rice growth, and the nozzle should be lowered to spray.

When the number of rice planthoppers is large, dichlorfenidin + pymetrozine or dichlorvos (chlorpyrifos) can be used, pymetrozine can enhance the duration of effect, which is suitable for use in the middle of rice growth, and add dichlorvos (chlorpyrifos) to enhance the quick effect, which is suitable for use in the late stage of rice when rice planthoppers are serious, and can quickly control the amount of insects.