Urgent prevention of pests attacking summer-autumn rice on a large scale

(Baohatinh.vn) - Pests and diseases on summer-autumn rice in Ha Tinh are becoming more complicated. Professionals recommend that localities proactively monitor and promptly control them to protect summer-autumn crop productivity.

Pests and diseases arise strongly, causing widespread damage.

In the 2025 summer-autumn crop, Ha Tinh has planted more than 45,000 hectares of rice, reaching 100.6% of the plan. The rice is entering the stage of intensive tillering, preparing to differentiate panicles - the stage that determines the final yield of the crop. However, unfavorable weather conditions have created favorable conditions for many pests such as small leaf rollers, brown planthoppers, white-backed planthoppers, yellow-backed bamboo locusts, etc. to arise and cause severe damage over a large area.

Brown planthoppers and white-backed planthoppers are also developing complicatedly in many fields in the province.

According to Mr. Tran Hung - Head of the Ha Tinh Department of Crop Production and Livestock, this is the year of the most unusual and serious outbreak of pests in many years. Currently, the second generation of small leaf rollers has appeared, causing damage to rice fields with an average density of 10 - 15 individuals/ ^m2 , in high places 20 - 30 individuals/ ^m2 , locally 80 - 100 individuals/ ^m2 , the infected area is more than 5,000 hectares, of which about 500 hectares are heavily infected.

Ms. Pham Thi Thu (Trung Tien village, Duc Thinh commune) said: “This crop, I have grown more than 1 hectare of rice, currently the small leaf rollers appear densely, especially in low-lying fields, with good, dense rice. The rice plant's leaf system is complete, so if attacked by worms, it will be difficult to compensate, affecting the process of photosynthesis and nutrient accumulation. I have sprayed pesticides in areas heavily eaten by worms and continue to monitor the situation.”

Aphids suck all the sap, causing the rice plants to gradually wither.

According to farmers, the worms are currently mainly 1-3 years old, nesting in the youngest leaves (leaflets), hidden under the canopy, very difficult to detect with the naked eye. This generation of worms is tending to directly attack leaflets, reducing the ability to photosynthesize.

Along with small leaf rollers, brown planthoppers and white-backed planthoppers are also complicatedly developing in many fields in the province. The infected area is more than 1,200 hectares, of which 300 hectares are heavily infected, 5 hectares are burnt. "Groups" of planthoppers commonly appear in most fields with a density of thousands of individuals/m². Some individual fields recorded a density of up to 8,000 - 10,000 individuals/m², mainly 5th instar and adult planthoppers, with overlapping generations.

Ms. Phan Thi Phuoc (Bac Van village, Dong Tien commune) shared: “I grow nearly 8 sao of rice, of which 5 sao are attacked by planthoppers. They appear densely, some areas have withered due to “planthopper burn”. This is an important time in rice growth, so we cannot be subjective. I sprayed pesticides twice in the infected fields and am still monitoring to see if the next crop of planthoppers will appear or not”.

Farmers in Dong Tien commune are still very worried despite spraying pesticides.

In addition to pests, brown spot disease has emerged and continued to cause damage to densely planted fields with excess nitrogen fertilization in localities such as Nghi Xuan commune, Cam Xuyen commune and Ha Huy Tap ward. The infection rate is generally from 7 - 10%, in some places it is up to 15 - 25%, the total affected area is about 100 hectares. In particular, a new species emerging in the province is the yellow-backed bamboo locust, which in a short time has eaten up more than 10 hectares of corn, reeds, sugarcane and some upland crops in Cam Due, Cam Hung, Cam Lac communes...

The yellow-backed bamboo locust disaster appeared for the first time in Ha Tinh.

Urgent pest control

According to the forecast of Ha Tinh Hydrometeorological Station, in the coming time, the weather will continue to be hot and sunny with showers, high humidity in the fields, creating favorable conditions for pests to continue to arise and cause strong damage.

Duc Thinh Commune People's Committee organized a field training workshop on preventing leaf rollers, brown planthoppers, and white-backed planthoppers.

Currently, the second generation of small leaf rollers has appeared at the first stage with high density, eggs continue to hatch, potentially causing widespread white leaf burn if not controlled promptly. Meanwhile, the second generation of white-backed planthoppers is forecast to appear from around July 20, coinciding with the stage when rice enters the heading stage, increasing the level of danger, affecting the yield at the end of the crop.

Faced with the risk of widespread pest outbreaks, many localities in Ha Tinh are proactively implementing synchronous response measures to protect summer-autumn crop yields. In Ha Huy Tap ward, authorities and residents are actively coordinating to implement pest control solutions for more than 1,400 hectares of rice.

Mr. Duong Van Hai - Deputy Head of the Economic , Infrastructure and Urban Department of Ha Huy Tap Ward said: "The Ward People's Committee coordinated with specialized units to conduct tests on more than 15 types of plant protection drugs in Yen Trung, Van Minh and Trung Thanh villages to evaluate the actual effectiveness, impact characteristics and retention time. From these results, we have developed detailed instructions on dosage, mixing methods and appropriate spraying times to improve prevention effectiveness and limit pesticide abuse. Up to now, the situation of planthoppers has been basically controlled, not spreading to other areas".

Drone spraying to prevent planthoppers in Ha Huy Tap ward.

In Thach Lac commune, local authorities have advised people to spray to prevent leaf rollers, brown planthoppers and white-backed planthoppers. "Up to now, we have sprayed to prevent leaf rollers on more than 130 hectares of rice, and sprayed to prevent brown planthoppers and white-backed planthoppers on about 500 hectares," said Mr. Nguyen Duc Hai - Vice Chairman of the Commune People's Committee.

Recently, the Department of Agriculture and Environment of Ha Tinh province held an urgent online meeting with 69 locations across the province to deploy urgent solutions to prevent and control pests on summer-autumn crops. Mr. Nguyen Thanh Hai - Deputy Director of the Department of Agriculture and Environment emphasized: "This year's pests and diseases are complicated, with the risk of causing widespread damage, directly affecting people's lives. Therefore, localities need to correctly assess the current situation, clearly identify the causes and closely coordinate with specialized agencies to guide farmers to detect early, localize and handle promptly."

The Department of Agriculture and Environment requires localities to strengthen the investigation, estimation, forecasting and timely warning of harmful objects; guide farmers to apply appropriate prevention and control measures according to each growth stage. At the same time, coordinate with enterprises to organize demonstrations of plant protection drugs in heavily infected areas to evaluate actual effectiveness, as a basis for widespread deployment. Specialized sectors assign technical staff to closely follow the fields, directly investigate, and guide on-site treatment to limit damage and ensure safe production in the summer-autumn crop of 2025.

Source: https://baohatinh.vn/cap-bach-phong-tru-sau-benh-tan-cong-lua-he-thu-tren-dien-rong-post291810.html