The occurrence and prevention of the second generation of Saponin

The occurrence and prevention of the second generation of Saponin

1 Generation II Sputum Warts Occurrence and Prevention Alert

According to the investigation of the overwintering base number and development progress of Sicuanhua, combined with historical data and meteorological conditions, a comprehensive analysis of this year's 1st generation of S. huaihuai is expected to have a large-scale ecological situation. It is hoped that the majority of farmers will seize the favorable opportunity. Annual base number.

First, the degree of occurrence:

It is estimated that the occurrence of S. japonicum in the first generation this year will be 5 degrees, and the accumulated oocyte volume in Putian will reach 5000-10000 pieces, and the average dry sheath rate will reach more than 50%.

Second, the main basis

1, the winter base is high. The overwintering base survey showed that the weighted average mu debris population was 5265, which was 0.48 times that of last year, 0.71 times the average of the previous year, and 4.2% after the winter, but it still showed a large occurrence base.

2. It is relatively late to see the moth under the lamp, and the peak period of the field moth is longer. Under the lamp, the moth was seen on April 29, 17 days later than last year. On May 12th, the number of cumulative moths accumulated by the system was reported to be 163, which was 0.07 times that of the same period of last year. The peak of the moth is late. Analysis of the developmental progress, the moth was at the peak of May 9-12, the peak period of the moth was as long as 10-15 days, part of the eggs will hatch in the field.

3, a large amount of eggs in the field. On May 13, the egg-weighted average 413.54 eggs in the field averaged 0.08 times that in the same period of last year. The amount of eggs in the later period will continue to increase.

4, favorable weather conditions. The steady rise in temperature in the middle and early May period was beneficial to the emergence of Slugs, Stasis, and Phlegm, and the field mortality rate was lower than last year.

Third, comprehensive prevention measures

1. Strengthen the management of fertilizer and water in the field, promote the delivery of shallow water, and cultivate a large number of people.

2. Prevention and control strategies: Prevention and control of the 1st generation of S. scutellariae adheres to the prevention and control strategy of “treating early, rule small, and prevent the rule”, that is, the use of drugs in the incubation period of S. indica, and the long-acting pesticides with high efficiency and low toxicity. the Lord.

3. Prevention and control time: The first prevention and control May 22-26, with water-bearing water, seedlings, live broadcasting, Daejeon, early throwing of Datian, paddy field floppy seedlings; the second prevention and control June 5-10, all Zhongdao Daejeon.

3, control of pharmaceuticals: 1 mu with chlorantraniliprole (Kang wide) 10 ml; 2 acres with killing 50 grams. Mu watered 50 kg evenly sprayed.

V. Other pest control

Rice epidemics: when the rainy season is fine, the rain is too heavy, which is beneficial to the disease. According to the survey, the field rate of Putian disease is 54%, and the diseased plant rate is 3%. It must be controlled in time for the initial stage of disease. Chemical control: Mu Wei Wei Wei 1 package plus metalaxyl 30 grams of water 50 kg spray.

Hummer: leaf rolling rate is 3-10%, serious field is over 15%, and mu is controlled with 60ml of high-efficiency chlorofluorocarbon.

Seedlings and rice seedlings: Mu is treated with Qi Gexing or 40 grams of Zhenle. (Source: Dangyang City Plant Protection Station) (Dangyang Agricultural 110 Zhu Liqing)

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