What is the "one spray and three defenses" in agriculture?

"One Spraying and Three Preventions" in the main producing areas of winter wheat is a key technical measure to prevent pests and diseases, dry hot wind, lodging and grain growth and weight gain by spraying mixed agents such as pesticides, fungicides, plant growth regulators and trace fertilizers during the wheat growing period, and to ensure wheat yield. In order to better implement the implementation plan of "one spray and three prevention" in the whole province and win a bumper harvest of summer grain, according to the actual situation in our region, the following prevention strategies are put forward.

The suitable period of "one spraying and three prevention" is from flowering stage to filling stage of wheat. Carry out the plant protection policy of "prevention first, comprehensive management", give prominence to key points, make overall consideration, focus on the prevention and control of four diseases and three pests (rust, powdery mildew, scab, leaf blight, wheat ear aphid, midge and red spider), and at the same time control other pests and diseases, prevent premature aging, increase grain weight and win a bumper wheat harvest.

Technical measures of "one spraying and three prevention" for wheat

"One spray and three defenses" should adopt comprehensive operation, one spray with multiple effects, and use pesticides, fungicides and trace fertilizers mixed. According to the occurrence trend of pests and diseases in wheat ear stage in our region, the following technical opinions on pest control are put forward:

1. Wheat field spraying mainly for preventing rust and midges 15% triadimefon wettable powder 75g or 12.5% diniconazole 40ml, 4.5% beta-cypermethrin 50ml, 98% potassium dihydrogen phosphate100g or liquid foliar fertilizer 50.

2. In the wheat field, spray 60 ml of 50% carbendazim or 65,438+000 g of 70% thiophanate-methyl, 25 ml of 3% acetamiprid EC or 20 g of 65,438+00% imidacloprid and 65,438+000 g of potassium dihydrogen phosphate.

3. Wheat fields mainly for controlling leaf blight and ear aphids should be sprayed with 65% mancozeb 150g or 70% thiophanate-methyl 100g plus 10% imidacloprid 20g and potassium dihydrogen phosphate 100g per mu.

Precautions:

1. When purchasing medicine, you must go to a regular store with complete three certificates, and refuse to use the so-called improved and compound triadimefon, so as not to affect the control effect.

2. When preparing wettable powder pesticide, a small amount must be hydrated and then poured into the applicator to stir evenly, so as to avoid phytotoxicity caused by uneven liquid medicine.

3. The dosage should be accurate. Prepare liquid medicine according to the dosage and water consumption per mu. The standard table is used for preparation. Don't add medicine at will.

4, field application must be carried out in the absence of dew, strict pesticide operation procedures, to avoid unsafe accidents.

5. Spray in case of rain within 6 hours after spraying.

In a word, in the middle and late stage of wheat growth, the temperature and humidity conditions are suitable, there are many kinds of diseases and insect pests, and the development speed is fast, which has a great influence on the yield and quality of wheat. Therefore, township and sub-district offices must strengthen leadership, raise awareness, overcome paralysis and luck, make full use of various forms, carry out publicity and launch, make preparations as early as possible, raise funds, put publicity and training in place, prepare enough pesticides and medical devices, start emergency plans when necessary, and take various forms to carry out the work of "one spraying and three prevention" of wheat in time, so as to minimize the losses caused by pests and diseases and win a bumper harvest of summer grain this year.