The National Meteorological Center released a medium-term forecast today. It is expected that the meteorological conditions in the Sichuan Basin and Guizhou will be moderate to moderately occurring in the areas from late July to early August, and Sichuan and Guizhou should actively respond.
Since July, the Sichuan Basin and Guizhou have been rainy and tidy. The meteorological conditions are conducive to the occurrence and development of rice blast. At present, the first season rice in Southwest China is in the booting stage, and will enter the heading stage in the latter part of the season. Since July, the average daily temperature in the southwestern region has remained between 20 and 27 °C. The percentage of sunshine in the first half of July is below 40%. The percentage of sunshine in the Sichuan Basin and western Yunnan is below 30%. The Sichuan Basin, western Guizhou and The number of rainy days in southwestern Yunnan is 7 to 10 days. The environment of moderate temperature, high humidity and illuminance is conducive to the development of rice blast.
It is expected that in the next 10 days, most of the southwestern regions will be dominated by rainy weather, which is conducive to the development of rice blast. According to the comprehensive analysis of meteorological conditions and model prediction results of rice blast, from late July to early August 2010 (one season rice heading and flowering period), rice blast development and development in Sichuan Basin, most of Guizhou and parts of southwest Yunnan The grade is 1 to 2, and the meteorological conditions are suitable for moderate to severe occurrence of rice blast; the western and southern Sichuan, western Guizhou, and central and northern Yunnan are grade 3, and meteorological conditions are not suitable for the occurrence and development of rice blast.
Blast in the development of meteorological levels: Level 1: the weather conditions are suitable for the development of rice blast; Level 2: weather conditions more suitable blast in development; Level 3: Weather conditions are not suitable blast in the development of
Prevention and Control Suggestions
In late July, it is the high-risk period of rice ear and neck in the southwestern region, and it is also the best time for prevention and control. As the meteorological conditions in the eastern part of the southwestern region are suitable for the occurrence and development of rice blast in this year, it is recommended that:
(1) Strengthen the monitoring of rice blast, timely control and rule, and prevent the spread of disease. (2) Grasp the precipitation gap and spray pesticides at the end of the booting stage or the beginning of the heading and the heading stage. (3) Strengthen water and fertilizer management in paddy fields to avoid excessive fertilization and deep irrigation. It can be used to prevent disease and increase fertilizer, improve farmland ecological environment, and prevent the occurrence and development of rice blast.
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