Current occurrence and Control of Diseases and pests in Rice Seedling Field
Aphids, thrips and blight mainly occur in rice seedling stage, which endanger the growth of rice seedlings. Rice thrips and nymphs are often harmful to the ears, tongues and heart leaves of rice thrips, and yellow and white spots appear in the damaged parts, followed by flower and white spots on the leaves, and the damaged seedlings return slowly to green and shrink, as if they were "sitting". Rhizoctonia solani mostly occurs in wet (semi-arid) seedling fields and dry seedling fields, causing dead seedlings. Due to the unstable temperature in the first and middle of April, it is easy to cause aphids, thrips and blight, affecting the whole seedling, full seedling and strong seedling. The agricultural technology centers of township offices are requested to strengthen the investigation of rice diseases and insect pests at seedling stage so as to control diseases and insect pests such as blight.
Prevention and control methods and agents:
1. 50% Kuling is sprayed with 50 kg water per mu to control blight.
2. Spray 50 kg of water with 10% imidacloprid 1-1.5 per mu to control aphids and thrips.
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Harm and Control of Liriomyza huidobrensis in Rice seed production
Rice stalk miner (ChloropsoryzaeMatsumura) is mainly distributed in Heilongjiang, Zhejiang, Jiangxi, Hunan, Hubei, Guangdong, Guangxi, Yunnan, Guizhou, Sichuan, Chongqing and other provinces in China. In recent years, it has become one of the main pests in rice production in hilly and mountainous areas of Chongqing, and the loss caused by it has exceeded that of some important pests such as borer. In rice seed production, the occurrence of Liriomyza huidobrensis seriously affected the development process of rice, which led to poor meeting of parents at this flowering stage and affected seed production.
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Technical guidance on current Rice production Management
At present, the production of early rice in China has entered the late growth stage, most of the early rice in southern Guangdong and Guangxi has entered the filling stage, a few of them have entered the mature stage, the middle part of Guangdong and Guangxi has begun to heading, and the north of Guangdong and Guangxi has entered the initial heading stage to heading stage; the early rice in the middle and lower reaches of the Yangtze River has entered the milk stage and the harvest is expected to begin around July 10. The northeast single cropping rice is in the peak tillering stage, young panicle differentiation stage and booting stage from south to north, the middle rice in the southwest winter paddy field is in the booting stage, the young panicle differentiation begins in the valley and hilly region, and the drying stage in Chengdu plain is at the highest seedling stage.
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