Proactively prevent rice leaf blight

(Baonghean) - After the storms with strong winds, the leaf blight disease has emerged and tends to spread widely in the summer-autumn rice crop. The whole province currently has 1,443.1 hectares of rice infected with leaf blight disease. If not proactively and effectively prevented, it will seriously affect rice productivity.

The bacterial leaf blight disease began to appear and spread rapidly in the summer-autumn rice fields in the communes of Nong Giang district of Quynh Luu from July 10 to 12. After a few days of thunderstorms, Ms. Nguyen Thi Loan, hamlet 5 (Quynh Giang commune) went to visit the fields and saw that the rice fields in the preparation stage of heading had yellow leaves and wilted. With the guidance of the agricultural extension officers of the commune and hamlet, she bought Starwiner 20WP to spray, sprayed again after 5 days, and did not add nitrogen and growth stimulants or foliar fertilizers to the infected rice fields. Thanks to that, her family's rice has now turned green again.

Spraying pesticides to prevent leaf blight in Dien Dong commune (Dien Chau).

According to people in the agricultural area of ​​Quynh Luu district, this year the development of the leaf blight disease is quite unusual. The disease appeared early, spread very quickly within just a few days and the symptoms of the disease are very obvious. In the communes of Quynh Giang, Quynh Dien, Quynh Hoa, Quynh Hong, Quynh Hau... the disease appeared simultaneously. The most serious was in the dry areas, lacking water in the communes at the end of the canal. Mr. Nguyen Tien Lien, Head of the Plant Protection Station of Quynh Luu district, said: Before the rapid development of the disease, immediately after receiving information from the people and going to inspect, the Plant Protection Station of the district issued an official dispatch to guide disease prevention, assigned the staff in charge of the area to work directly with the communes, announced on the loudspeaker system, and at the same time organized mass spraying and by July 17, basically spraying was completed on the entire area of ​​750 hectares infected with the disease (of which 200 hectares were severely infected, with an infection rate of over 40%). “Up to now, the disease has not spread further. However, in recent days, 27 hectares of rice have been infected with the disease in semi-mountainous communes such as Tan Son, Quynh Tam, Quynh Tan, on the area of ​​​​summer rice at the young panicle stage, especially the high density of infection in green rice fields. We have instructed people to prevent and control the disease. If the disease is mild, they can use fine lime powder sprinkled in the early morning to limit the spread of the disease. In addition, in the summer-autumn rice areas where the disease has been temporarily controlled, regular inspections must still be continued. If there is rain and wind, prevention and control must be continued, because although the disease has not yet appeared on new leaves, if there are thunderstorms or tornadoes, it will be very easy to spread because the source of the disease is already present,” said Mr. Nguyen Tien Lien.

Dien Truong Commune is one of the localities with the first rice area affected by leaf blight disease in Dien Chau District. The whole commune has 50 hectares of rice affected by the disease, mainly on high-quality rice areas such as Bac Thom and AC5 in the preparation stage for flowering. The commune has instructed farmers to spray with specific pesticides and has initially controlled it. Dien Chau District currently has 561 hectares of rice affected by leaf blight disease. Mr. Le The Hieu, Head of the Plant Protection Station, said: The source of the disease had existed before but was only scattered and did not spread due to the lack of rain and wind. However, after the storm, the disease began to develop more strongly. At first, there were only more than 10 hectares in the outer communes such as Dien Truong, Dien Doai, Dien Hong... but then it appeared in the inner communes such as Dien Hoa, Dien Hanh... In that situation, the Plant Protection Station organized quick training for officials from the vice chairmen of the commune, plant protection, agricultural extension, and heads of rice cooperatives on disease prevention measures. Up to now, the disease has been basically controlled and not spread further. Currently, the rice plants are in the final stage of forming panicles and are about to bloom. If the disease does not continue to spread, the yield will be guaranteed, but if there is rain or strong winds that tear the leaves, the disease will continue to appear and spread. Therefore, Dien Chau is currently sending staff to isolate the area, closely monitor and monitor to detect the disease early, and at the same time advise farmers to fertilize the rice when the disease is gone, prioritizing increasing the amount of potassium for the rice.

According to information from the provincial Plant Protection Department, currently in the summer-autumn rice area from the tillering stage to the panicle initiation stage, bacterial leaf blight has arisen and is spreading, causing widespread damage. The whole province currently has over 1,443.1 hectares infected, of which 292.5 hectares are severely infected. The infected area is concentrated in the districts of Quynh Luu (747 hectares), Dien Chau (561 hectares), Yen Thanh (113 hectares), Tan Ky (10 hectares).... The disease rate is common at 10 - 20%, in some places it is 30 - 40%, locally in some areas the disease rate is up to over 50%. Currently, sheath blight has also arisen and damaged over 1,730.5 hectares of rice in the panicle initiation stage in the districts of Dien Chau, Yen Thanh, Quynh Luu, Hung Nguyen, Nam Dan.... with a high rate of 30 - 40%. It is forecasted that the disease will continue to cause damage in both scope and severity, especially severe damage in fields with dense planting and excess nitrogen fertilization.

According to Mr. Trinh Thach Lam, Head of the Department of Agricultural Plant Protection - Provincial Plant Protection Sub-Department: District plant protection stations need to focus on assigning staff in charge of the area to closely follow the fields to investigate, detect, estimate, and promptly forecast diseased areas and areas at high risk of infection. At the same time, advise timely and specific technical measures for prevention and control to authorities at all levels, coordinate with relevant departments and branches in the area to jointly organize, direct, and guide farmers to prevent and control new diseases with one of the following drugs: Xanthomix 20WP, Starwiner 20WP, Xantoxin 40WP, Totan 200WP... according to the recommended dosage and spray again every 5-7 days if the disease continues to occur. In particular, absolutely do not apply nitrogen fertilizer, do not use growth stimulants or foliar fertilizers on rice areas that are infected or infected.

Phu Huong