Rice leaf roller control technology
The rice leaf roller is a migratory pest, and the adult has a greenish and phototaxis. The difference in resistance between varieties (combinations) is not obvious. According to the rice leaf roller, the infested pests and their adults have the characteristics of greening and lightening, strengthen the control of seedlings in the 1-2 generations, and reduce the number of insects; properly adjust the sowing period to avoid the growth of rice insects. It meets with the high incidence of rice leaf roller; it uses the frequency vibration insecticidal lamp to trap adult insects. Promote green ecological prevention and control technologies such as raising ducks, raising fish, raising frogs and using biological pesticides in rice fields.
Technical points:
1. Properly postpone the sowing period, so that the rice susceptibility period avoids the high incidence period of rice leaf roller and the peak period of migration.
2. Install the frequency-vibration insecticidal lamp to trap the adult, which can effectively reduce the source of the next generation. The use of sexual attractants to trap adult insects to control rice leaf roller, safe, green and environmentally friendly. Advocate physical and ecological prevention and control technologies such as raising ducks and raising fish in rice fields.
3. Strictly control the rice leaf roller in the seedling stage and the late growth stage (pregnancy-milk stage), and appropriately relax the intermediate stage control indicators. The control index is 40 tillering period of 2-3 instar larvae at the peak period, and 20 in the seedling stage and panicle stage.
4. Sprayed in the period from the hatching period of the leaf mites to the second instar larvae (initial leaf rolling stage) or 2 days after the peak of egg hatching. 31% fluoronitrile oxazolidine microemulsion, chlorpyrifos, rice granules, Bacillus thuringiensis (Bt) 8000 IU / mg wettable powder 300 g / acre, sprayed in the rice stalk egg stalk incubation period; 25% EC Chlorpyrifos·Triazophos 30g active ingredient/mu; insecticidal or insecticidal double 75g active ingredient/mu; profenofos 50g active ingredient/mu. For the control of 2nd instar larvae, chlorantraniliprole, avermectin, avidin, profenofos and the like can be selected. Both are 45-50 kg of water, and the fine mist is evenly sprayed on the upper part of the rice plant.
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