Straight grain rice butterfly control
2019-10-05 14:06:13
1. Agricultural control. Elimination of overwhelming insect sources. Combine winter manure, eradicate ponds, trenches, and field weeds, especially grasses, to eliminate overwintering larvae. 2. Cultivation techniques. Generally in the middle rice area, do a good job in the reform of the cultivation system, select high-yield insect-resistant early maturing varieties, and reasonably arrange the planting period of late, medium, and early maturing varieties, so as to avoid the third generation larvae during the period of tillering and rounding. Strengthen field management, rational fertilization, increase the application of thermal fertilizer to cold-sweeping fields and mud-bearing fields, and intermittent shallow water irrigation to promote rice early maturity. 3. Chemical control. Based on the prediction, the larvae were used before the third instar. In the mountainous area, it is controlled by powder spraying, and the application effect is good in the morning or evening. The commonly used agents are: (1) Use 90% crystals of trichlorfon 1.125kg or saccharomycetes essential oil 1500g per hm2, and spray with water. (2) 3% insecticidal double granules, spread uniformly with 24.75 kg per hm2. (3) 25% insecticidal water-repellent agent, use 3,000 to 3,750 ml per hm2, spray 1 125 to 1 500 kg of water or apply poisonous soil.
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