How to kill rice planthopper What pesticide is used for rice planthopper?

Planthoppers are migratory pests The most important thing should be unified control and control Controlling the source of the plant is the key At present, the source of planthopper is mainly from Yunnan, Guangxi and Southeast Asian countries.

If planthoppers occur in paddy fields, imidacloprid, pymetrozine, thiamethoxam, chlorpyrifos, etc. can be used, and the effect is very good, but it is important to avoid continuous application of a single drug, which will produce strong resistance.

Imidacloprid and avermectin spraying!

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.

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.

The more commonly used agents for the control of rice planthoppers are endinotefurin, etethhrin, fenvalerate, deltamethrin, thiazinone, pymetrozine, etc., and the pesticides suitable for the local area are selected according to the specific situation.

Due to the high temperature when spraying, it is recommended that under the premise that the dosage per mu remains unchanged, more water should be pumped, beaten thoroughly, and the liquid medicine should be sprayed on the whole rice plant as much as possible.

In the process of planting rice, there is more rain in the early stage, and when it is drier in the later stage, the occurrence degree of rice planthopper will increase, and rice planthopper is one of the common pests in the growth process of rice, and it is very harmful to rice, and it is easy to cause yield reduction if it is not prevented and controlled in time.

Rice planthopper is a kind of stinging and sucking pest, so to suck the juice of rice, sometimes a rice, can have a lot of rice planthoppers, causing the leaves to yellow and dry, serious direct death, another way of harm, is to spread the disease, under normal circumstances, rice planthopper transmission stripe leaf blight is more powerful, under the attack of pests and diseases at the same time, if not timely control, there is only waiting for the yield to be reduced.

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.