What kind of medicine is used to fight rice planthoppers, and what pesticides are used to fight rice

To control rice planthoppers, thiamethoxam, dimethoxam, pymetrozine, thiazinone, and acetamiprid can be used for spray control.

If the occurrence of rice planthopper is severe, you can use dichlorvos with fine soil, drain the field with dry water and spread it at noon. You can also choose thiamethoxam, pymetrozine, dime + chlorpyrifos spray control, and spray again every 3 days.

The control of planthoppers should be mainly based on brown planthoppers, and its comprehensive control measures are as follows:

1) Choose insect-resistant varieties.

Rice planthopper is an important pest on rice, and there are a number of insect-resistant varieties cultivated by anti-source hybridization, which can be planted with insect-resistant varieties suitable for local use.

2) Biological control.

The first is to protect natural enemies, rice planthoppers can be preyed upon or parasitized by many natural enemies in rice fields. For example, all kinds of spiders and frogs prey on adults and nymphs, black-shouldered green blind bugs suck rice planthopper eggs, various rice lice tassel wasps parasitize rice planthopper eggs, and various stinging wasps parasitize rice planthopper nymphs. These natural enemies can play a role in inhibiting the occurrence of rice planthoppers.

When using pesticides, it is necessary to pay attention to the selection of medium and low-toxicity pesticide varieties with low lethality to natural enemies, especially in the early stage of rice, we should try not to use pesticides or use less pesticides to reduce the killing of natural enemies. The second is to raise ducks in rice fields, according to the situation of insect pests in rice fields, grasp the peak period of rice planthopper and leafhopper nymphs and the beginning period of borers, rice leaf roller borer adults in the rice field duck control, not only has a significant control effect on rice planthoppers, but also because of the trampling of ducks, there are very few weeds in the rice field, and received the dual effect of insect control and weeding.

3) Cultivation control.

Cultivation measures such as reasonable dense planting, shallow water irrigation, timely roasting, partial application of nitrogen fertilizer, preventing the growth of rice in the later stage, and reducing the humidity of rice fields can reduce the reproductive coefficient of rice planthoppers.

4) Pharmaceutical prevention and control.

Due to the large occurrence area and serious damage of rice planthopper, doing a good job in insect investigation and using selective pesticides are still the main measures for prevention and control at present. The pesticide is applied when there are more than 1,000 insects per 100 bushes of rice. Spray 20 kg of water per 667 m2 with 25% pymetrozine suspension wettable powder, or 30 grams of 25% paramedic powder.

Generally, the year of occurrence is controlled with 40 50 ml of 1% insecticide (avermectin) suspension agent per 667 m2 of the main pest generation, and the appropriate period of control is the peak period of young nymphs.

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. . .

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