At present, large areas of rice have matured and harvesting is about to kick off. However, due to inter-regional planting seasons and other reasons, there are still some parts of rice still in heading to full heading stage, some are in jointing and booting stage, and are easy to plant diseases such as rice planthoppers, panicle blast, bacterial leaf blight, and sheath blight. Hair period.
Brown planthoppers have been reported to occur in rice generally, and part of the heavier fields have fallen. As the ability of rice to absorb drugs decreases in the later period, the control effect of spraying systemic insecticides on rice planthoppers has decreased significantly. It is best to use poisonous soil method to prevent and control. That is, 80% of dichlorvos per acre is used for 100 grams of water per acre 1.5 2.5 kg of diluted soil and 25-30 kg of fine soil or fine sand are used as poisonous soil, applied to rice fields, and used for withdrawal of toxic water.
Bacterial Blight of Rice Bacterial blight is a serious bacterial disease in rice. The bacteria will spread through rainwater and water. In the low-lying fields, there has been a large area, and the farmer should immediately organize the use of drug groups such as methamphetamine and streptomycin to rule the field.
In the survey, the rice leaffolder has been found to be infested by rice leaf roller larvae in some paddy fields, and there are also many adults on the rice paddy and field weeds. The technicians should strengthen the field investigation, and report the occurrence of the insects in the local area in a timely manner. At the same time, the farmers should be organized to prevent and control them.
In the survey of panicle-necked crickets, no heavier plots have been found in the panicle-necked pheasant. However, continuous long-term rainfall has occurred since mid-July. Rain and drizzle have caused damage to the panicle-necked pheasant. Farmers should be organized on the sunny day for booting and heading. Rice spraying prevention.
In the study of sheath blight, sheath blight was prevalent in the fields, and some serious areas had infested the panicles. The wounds caused by the brown planthopper feeding on rice and laying eggs were conducive to the expansion and spread of sheath blight on plants. The blight-heavy field also easily attracts brown planthoppers for feeding, so it is necessary to strengthen the control of sheath blight and rice planthoppers.
Based on the current occurrence of brown planthopper, bacterial blight, panicle blast, sheath blight, and rice leaffolder, it is imperative to strengthen rice field management and the above-mentioned prevention and control of pests and diseases. The township technical personnel should continue to strengthen field inspections in accordance with the actual conditions of local rice production, timely grasp the occurrence of local rice pests and diseases, use intermittent sunny days, and carefully organize farmers to carry out pests such as rice blast, rice planthopper, leaf blight, and sheath blight. Prevention work.
The controlling agents of bacterial leaf blight were methamphetamine, streptomycin for agricultural use, and copper citrate for copper, etc.; rice bran was selected for rice bran, prochloraz, tricyclazole, etc.; 80% dichlorvos mixed soil was used for rice planthoppers, etc. ; Sheath blight used propiconazole, Jinggangmycin, etc.; rice straw larvae, armyworm, rice leaf roller used AA salt, chlorpyrifos, ether pyrethrin and so on.
In order to improve the control effect, the following points should be noted during the prevention and control process: 1. Field water must be withdrawn before spraying. 2. Spray 3 barrels of liquid (45 kg) per acre and spray evenly. When controlling sheath blight, the liquid should be sprayed on the lower part of the plant. 3. In case of rain within three hours after spraying, it is necessary to make supplements after sunny weather. 4. It is best to use the natural village or the area as the unit to implement unified defense. 5. The occurrence of rice blast in rice blast and rice straw larvae is relatively slow, and the effect of adding rice dwarf resurrection king is more obvious. Farmers in mountainous areas have added rice dwarf resurrection kings to their liquids for the prevention and control of rice diseases and insect pests. This will not only improve the prevention and control effect, but also facilitate the tillering and rooting of rice and promote the robust growth of rice.
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