The current late-stage rice diseases and insect pests are dominated by "three insects and one disease," namely, rice leaf roller, rice blast, stem borer, and sheath blight. First, a live situation: 1, five (3) generation rice leaffolder: from July 30 to August 1 after the peak, again on August 4-5 moth peak, the peak daily amount of moth: test There were 586.7 areas, 1086.6 streams in Zhuxi, and the highest number was 2,440. After the peak, the moths continued to prosper. The average daily moth volume was still 539 on August 5-15. At present, the density of eggs in the field is generally higher. According to a survey conducted by the Zhuxi monitoring station on August 17, the average egg weight per mu of single-season rice is 106,000 (2.9-21.6), and the average egg weight per mu is 2.16 million (1.44-2.88). The day of ovulation: white eggs accounted for 18.87% and yellow eggs accounted for 79.24%. It is expected that the peak period of young larvae in the field will appear on August 21-23. 2. Five- and Three-generation (3) generation rice cultivars: mainly white-backed rice cultivars, with a large amount of early grazing. In July, a total of 549 larvae were induced by lamps, which was a 2.5-fold increase over the same period of last year. The current single-season rice worm population is high. According to the Zhuxi monitoring and reporting point on August 15, the average single-season rice was 158.7 rice (95.3-266.5), of which 112.8 were rice white-backed rice stubs, which accounted for 71.1%, which was a 2.4-fold increase from 33.3 in the same period last year; The station investigated in Dandong on August 12th. There were 398,000 acres of rice in the affected area, of which 86.4% were white-backed rice, 4.8% were brown rice, 4.4% were brown-winged, short-winged, and brown rice were short. The initial period of fin-shaped adults is 27 days earlier than normal. 3. II. Sichua: The second generation of S. pylori has basically controlled the hazards after repeated prevention and treatment, but the inter-area blocks are not balanced, and the amount of local debris is still large. According to the site survey conducted on August 15 in this site, the hazard rate of severe field clumps was 62.5%, the hazard rate of strains was 10.85%, and the number of acres per mu was 8,000. 4. Sheath blight: This year's single-season rice sheath blight was first seen on July 19, close to normal, and the disease developed rapidly in the near future. According to a survey conducted by the Zhuxi monitoring station on August 15, the average single-crop ratio was 10% (3.33-16.67), and the incidence was double that of the same period of last year. Since the annual occurrence of Rhizoctonia occurs from August 25 to September 15, it is expected that the disease in the field will increase dramatically. Second, prevention and control advice: 1, control strategies: Indications rice leaf roller, treat rice sheath blight, rice blast, rice stem borer. 2. Prevention and control targets: Single-season rice will be inserted early and inserted late. 3, control time: August 21-23. 4, pharmaceutical formulations: Mu with 1,30% Lei Leike EC 80 ml +10% carbazole (or Bitan) 10-15 g +5% A Jinggangmycin 1-1.5 packages. 2. 90% Dan Miao 90g + 10% carbazole (or Bitan) 10-15g + 5% A Jinggangmycin 1-1.5 bags. Choose one of the above formulas and mix with 40-50 kilogram water evenly. Note: 1 It is necessary to use the drug in proper period and spray the amount of 3 backpacks per acre. The spray should be even and thorough, and do not spray heavily. 2 Strictly prohibit the use of highly toxic and high-residue pesticides and pay attention to the safety of pesticide application, and advocate the early and late spraying of pesticides.
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