Timely fertilization and medicine to catch rice disaster

Due to the recent high temperature in the southern rice area, especially in the southeastern part of Hubei Province, the maximum temperature of 35~38 °C has lasted for nearly one month, and the local area is as high as 40 °C. At this time, the mid-season rice heading and flowering season is more difficult. Seriously, for this reason, some rice resilience measures are proposed for reference.

Q: What remedies are available for the current status quo?

A: Where there are water sources, the medium rice still needs to catch the drought-resistant irrigation. The deep-water irrigation in the field should maintain the water layer of 6~10 cm. At the same time, we must grasp the foliar spray fertilizer, use 150~200g of potassium dihydrogen phosphate to 60kg of water or 0.5~1.0kg of urea to water 60kg, use the morning and late time for foliar spraying, which can enhance rice Its own resistance, reduce heat damage, increase the seed setting rate and 1000-grain weight. Of course, in order to save labor, it is best to combine the control of rice pests and diseases in the late stage.

For the middle rice fields that have suffered from high temperature and heat damage, but are affected by the disaster, it is expected that the field with a yield of less than 100 kg may be considered to retain the regenerated rice later, but before the end of August. For the fields that have caused the death of dead seedlings, we must act decisively and make early plans to rush to plant autumn crops, replant crops and vegetables with short growth periods, and strive to make up for the loss of rice.

Question: What is the current situation of pests and diseases, how to prevent and control?

A: The current high temperature and drought, although it has caused great harm to humans and crops, it has not greatly inhibited rice pests and diseases. According to the recent investigation by the plant protection department of Hubei Province, the current pests and diseases have occurred. The following features:

According to the investigation of the plant protection department, the average insect population of rice planthoppers in the southeastern part of Hubei Province is 2,200, the highest insect population is 15,000, and the total number of insects in some counties and cities in Jianghan Plain is 1,000. Above, the typical field has more than 8,000 heads, and the number of insects in most rice areas in the province has reached 1500-2000 heads. About 30% of the plots have reached the prevention and control standards.

According to the investigation of the plant protection department of Huangzhou District, about 30% of the fields exceeded the control standards, and the average number of damaged fields was more than 800, and the number of insects exceeded 400. Head, the situation is very pessimistic.

Severe high temperature caused by diseases such as sheath blight causes some areas with water source to infuse deep water to resist drought, and at the same time induces serious occurrence of sheath blight. According to the investigation of Hubei plant protection department, the incidence of sheath blight is 100%, and the disease rate has been It has reached 30%~70%, and the disease rate is as high as 80%. There is a town in Huanggang City with a “dry heart” rate of more than 1,000 mu.

In the middle and upper part of August, the third generation of rice planthoppers grew rapidly. If the prevention and control were weak, it would directly lead to the outbreak of the fourth generation of rice planthoppers. The third generation of rice leaf roller directly affected the top three functional leaves of rice. It can cause a significant reduction in rice yield, and rice smut, rice blast, and sheath blight can be re-infested under favorable weather conditions.

Control measures and methods:

For pests, we must adhere to the "control", timely use of drugs, lower the base, and prevent the outbreak of pests in the middle and late stages. For the disease, it is necessary to adhere to the "prevention", and comprehensively fight drugs in the 3 to 5 days before the heading of the mid-season, and prevent the disease from becoming popular in the later period.

It is necessary to select high-efficiency, low-toxic, low-residue and long-lasting agents for prevention and control. The control of rice leaf roller is mainly based on chlorantraniliprole, lesbian, aepress and avermectin.

The control of rice planthoppers is mainly pymetrozine, thiazide, and buprofezin. The serious rice fields should be mixed with quick-acting agents such as lesbian and isoprocarb.

The protective drugs for preventing rice smut and sheath blight are mainly benzepazole, tebuconazole, hexaconazole and jinggangmycin. The protective agents for preventing rice blast are mainly erythromycin, tricyclazole, Bacillus subtilis and the like.