Pest and disease control for spring rice crops.

Through field inspections conducted by the Provincial Department of Crop Production and Plant Protection, it was found that the spring rice crop is currently in the tillering stage, entering the heading and panicle formation period. This is a crucial time for care and fertilization to ensure the rice plants receive sufficient nutrients, which will determine the yield of the crop. However, some bacterial diseases such as leaf blast, bacterial leaf blight, and stripe spot have emerged, causing localized damage to some varieties like BC 15, TBR 225, Thien Uu 8, Thai Xuyen 111, and hybrid varieties, affecting over 11.5 hectares in Son Duong, Ham Yen, and Na Hang districts. In some areas, the disease rate reached 8-10% of the leaves.

People in Phuc Ung commune (Son Duong district) are spraying pesticides to control rice blast disease in the spring crop.

Mr. Hoang Van Tap, from Dong Luoc village, Phuc Ung commune (Son Duong district), said: “My family has 4 sao (approximately 0.4 hectares) of rice that is currently in the heading stage. This year, the weather has been unusual, with prolonged hot days but cool mornings, creating favorable conditions for pests and diseases to develop. I had to spray pesticides once, and many areas were affected by brown planthoppers and rice blast. Lack of water has also caused the rice leaves to turn yellow. If not treated promptly, the yield will decrease significantly.”

According to a report from the Provincial Department of Crop Production and Plant Protection, the area of spring rice planted in the province is currently over 18,000 hectares. However, pests and diseases are developing strongly in the fields at this time. Specifically, brown planthoppers and white-backed planthoppers are causing scattered damage, with localized densities of 50-60 individuals/m2; adult rice leaf rollers are causing scattered damage, with densities as high as 1 individual/m2 in some areas; rice blast disease is causing localized damage to susceptible varieties such as BC 15, TBR 225, Dai Thom 8, glutinous rice, etc., with damage rates reaching 3-5% in some areas and 10-12% in others. Rats are causing localized damage in some fields, with damage rates reaching 2-3% in some areas and 5-6% in others. Localities with high pest and disease densities include Son Duong and Ham Yen.

Comrade Nguyen Thanh Long, Deputy Head of the Provincial Department of Crop Production and Plant Protection, advised: “The rice heading stage is very sensitive, and the changing weather creates favorable conditions for pests and diseases such as thrips, leaf rollers, stem borers, brown planthoppers, etc., to develop and cause damage. Farmers need to regularly inspect their rice fields, and when pests and diseases are detected, they must spray pesticides to prevent widespread outbreaks. The use of plant protection products should also adhere to the instructions on the packaging and ensure appropriate waiting periods to avoid waste and protect the environment.”

For rice blast disease, the most dangerous disease for rice plants during this period, which spreads rapidly over a wide area, the Agricultural Extension Center, in coordination with the Department of Crop Production and Plant Protection, recommends that farmers apply balanced nitrogen, phosphorus, and potassium fertilizers, and increase the amount of manure. When the disease first appears, maintain water levels and stop fertilizing. Regularly inspect and proactively control the disease. Upon detecting signs of the disease, immediately spray with pesticides such as Ninja 35SE, Filia 525SE, Nativo 750WG, etc.

Similarly to bacterial blight and bacterial stripe disease, when small, round, yellowish droplets of fluid appear on the surface of the diseased leaves, stop applying chemical fertilizers, maintain a water level of 2-3 cm in the field, and use one of the following pesticides: Sasa 25WP, Avalon 8WP, Anti-xo 200WP… Spray the pesticide in the cool afternoon, mixing it according to the dosage and instructions. If the disease is severe, spray twice, with each spraying 5-7 days apart.

Source: https://baotuyenquang.com.vn/phong-tru-sau-benh-hai-lua-xuan-210574.html