A specific drug for rice leaf rollers and heart worms.

In the process of rice planting, there are often some diseases and insect pests. Leaf rollers and drillworms are two of the most harmful pests. What are the specific drugs of rice leaf rollers and heart worms?

I. specific drugs of rice leaf rollers, heart worms

Bacillus thuringiensis, chlorobenzamide, flurosemide, tetrachloroacetamide, fluorodiamide and perchloromethyl salt can be used for the control of rice leaf rollers. In order to reduce the drug resistance of insect pests, attention should be paid to the alternate use of drugs.

According to the main local rice diseases and pests, Yubei District put forward the following control suggestions:

1. Use 8 grams of Fogo or 40 milliliters of Liangtai + 50 grams of thiazinone + 50% difenoconazole per mu. Propiconazole EC 12ml, mainly for rice planthopper, rice stem borer, rice leaf roller and sheath blight, as well as other diseases and pests.

2. Use 3% Jia Wei per mu. Lice acaridone 100 ml or 5% avermectin 30-40 ml + 25% thiol. 40 grams of isowettable powder, mainly for rice leaf roller and rice planthopper.

3. 30% imidacloprid per mu. Thiazinone 60-70 g + 30% difenoconazole. Propiconazole 12 ml + 25% methylvitamin. Indenyl water dispersible granule 8 grams, mainly for rice planthopper, rice leaf roller, rice sheath blight, and other diseases and pests.

4. 20% chlorobenzamide 10 ml 25% thiazinone 50 g + 10% difenoconazole per mu. Tebuconazole 34 grams mainly treats rice planthopper, stem borer, rice leaf roller, rice blast, rice sheath blight and so on.

5. Use 70% imidacloprid water dispersible granule 3 g + 3% avermectin 60-90 ml + 40% benzyl methyl per mu. Azoxystrobin suspension 16g to control rice planthopper, rice leaf roller, rice sheath blight and rice blast.

II. Control of other diseases and insect pests in rice

1. Rice blast

Leaf plague: when acute plaque occurs in the field, and the rate of diseased leaves reaches 5%, the field must be treated with pesticides to control the disease center.

Panicle neck blast: in the rice break stage, all fields with severe leaf blast in the early stage or light leaf blast in the early stage and inverted clover disease in the later stage should be listed as a control target field, and the control should be started 3 days before the break; for the susceptible varieties, the growth period is too late, the inverted clover disease (the incidence of flag leaves or leaf pillows is more than 1%) or the surrounding leaf blast is serious, one control should be carried out in the break stage and the full heading stage. The main potions are: tricyclazole, rice blast Ling (Fuji No. 1) and so on.

2. Sheath blight (false smut)

The dry seedling with good growth and high density should be prevented. In the paddy field with disease in the field stage, the disease cluster rate of rice from the late tillering stage to the round rod jointing stage should reach 10%. When the disease cluster rate at booting stage reaches 15-20%, it is the appropriate period for prevention and control, and the liquid should be sprayed on the middle and lower parts of rice plants.

The control of rice false smut should be controlled from the end of tillering to the jointing stage of round stem, before breaking and about 5 days before heading.

The main agents are: Jinggangmycin, Chunleimycin, thiofuramide, tebuconazole and so on.

When applying Jinggangmycin, it is best to do it on a sunny day after rain. if it rains heavily within two hours after application, the drug should be used again.

3. Rice planthopper

More than 10 rice planthoppers per clump at tillering stage and more than 5 planthoppers per clump at booting stage should be sprayed immediately. The main agents are: dichlorvos, chlorpyrifos, chlorpromazine, cicada powder and so on. It is suggested that dichlorvos + chlorpyrifos or chlorpyrifos + chlorpromazine + buprofezin or dichlorvos + leafhopper powder should be mixed.

At present, there are many pesticides, and the proportioning methods are also various. The above content is just a reference.