1. According to the situation of rice pests and diseases, timely and correct medicine: fish cultured in rice fields can play the role of natural enemies of rice pests and diseases. Therefore, fish farming rice fields can relax the prevention and control indicators for certain pests, delay the prevention and control period, reduce the number of prevention and treatment, and reduce the use of drugs. Area, reduce costs.
2. Select high-efficiency, low-toxic, low-residue pesticides: fish-fertilized rice fields can not use pesticides that are highly toxic to fish. It is best to choose water or oil, and try not to choose porridge.
3. Master the normal use of pesticides and the safe concentration of fish to prevent fish poisoning death caused by excessive pesticide application.
The commonly used pesticide dosage and safe concentration of fish are as follows:
Pesticide name Routine dosage (g/mu) (PPM) General dosage Maximum dosage Safety concentration 25%
Insecticide water repellent 150 200 1.50 2%
Insecticide water 50 100 1.0 90%
Trichlorfon crystals 75 100 2.0 40%
Dimethoem emulsion 50 75 2.0 50%
Methamidophos emulsion 50 75 1.0 50%
Killing pine 50 75 0.8 40%
4. The method of administering the drug should be appropriate. 1 The fish should be deepened before applying the rice in the rice field, and cover the surface of the field by 7 to 10 cm. 2 The application of the pesticide should be carried out in the morning when the dew is not dry to prevent excessive pesticides from falling into the water. Aqueous and emulsion pesticides should be sprayed in the evening to reduce the harm of pesticides to fish stocks. Spray, advocate fine spray, mist, spray head up, sweep the water stems and leaves, reduce pesticides dripping into the water. Spraying is not changed before rain, in order to prevent rainwater from rushing pesticides into the field; 3 fish farming rice fields should generally not use soil mixing to remove pesticides; 4 fully play the role of rice field fish letters, before the application of the field, first release the field water Let the fish enter the fish letter and then apply the pesticide. When the pesticide toxicity no longer has a greater impact on the fish, release the water into the field. 5 When applying pesticides, you can also open the inlet and outlet of the field and let the water change. First, apply the medicine from one end of the water outlet to the middle of the field to stop the contaminated water, and then apply half of the medicine to reduce The effect of pesticides on fish.
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