Pesticide residues have always threatened people's health. At present, pollution-free vegetables, green vegetables and organic vegetables have become the main trend of consumption. The Ministry of Agriculture has recommended four batches of high-toxic pesticide substitutes for five kinds of organophosphorus pesticides, such as methamidophos, parathion, methyl parathion, monocrotophos and phosphonamides. China Pesticide Network gives you a detailed introduction to the control of alternative pesticides for vegetable pests:
First, the prevention and control of vegetable aphids. Imidacloprid, recommended dose is 1-2 grams of active ingredient / acre; acetamiprid, recommended dosage is 0.45-0.6 grams of active ingredient / acre; pymetrozine, active ingredient 5 grams; pyrethrin, active ingredient 1.8 grams; bitter Alkali, the active ingredient is 0.4 g; chlorothiazide, the active ingredient is 2 g. Spray at the beginning of the locust.
Second, the prevention and control of vegetable tobacco powder. Imidacloprid, the recommended dosage is 2 grams of active ingredient per mu; bifenthrin, the recommended dosage is 0.75 grams of active ingredient per mu. Spray application at the beginning of the season.
Acetamidine, active ingredient 2.5 g / mu (for example, 3% acetamiprid emulsifiable concentrate 83 ml / mu); thiamethoxam, active ingredient 4 g / mu (for example, 25% thiamethoxam water dispersible granules 16 g / mu) . Spray pesticides at the nymphs during the initial period.
Third, prevention and control. The active ingredient of chlorpyrifos is 160g. It is diluted in water and evenly poured on the roots of leeks. The active ingredient of diazinon is 400g. It will be granules in the initial symptoms of leeks. Mix the soil, mix it and apply it, and pour the water after application to ensure the efficacy. 30 mg of the active ingredient of chlorfenapyr; 480 g of active ingredient of phoxim. When the symptoms of the leek are initial, dilute the water and evenly pour it on the roots of the leek.
Fourth, the prevention and control of diamondback moth. Emamectin, the recommended dosage is 0.15-0.25 g active ingredient/mu; fipronil, the recommended dosage is 1-2 g active ingredient/mu; chlorfenapyr, the recommended dosage is 3.35-5 g effective Ingredients/mu; indoxacarb, recommended dosage is 3g active ingredient/mu; worm nitrile, active ingredient 5-6g/mu (eg 10% chlorfenapyr suspension 50-60g/mu), water 50 liters of spray once; flubendiamide, 3 grams of active ingredient. Sprayed on the larvae of the second instar larvae during the hatching period of Plutella xylostella.
Fifth, the prevention and control of beet armyworms. Bipropiononitrile, the recommended dosage is 5g active ingredient/mu; furose hydrazide, the recommended dosage is 6g active ingredient/mu; indoxacarb, recommended dosage is 2./mu); methylaminovir The bacteriocin, the active ingredient is 0.3-0.5 g/mu (for example, 1% emamectin emulsifiable concentrate 30-40 ml/mu), and sprayed once with 50 kg of water. The pesticide network is recommended to be sprayed at the younger stage of the beet armyworm (before the larva 2 years old). Tebufenozide + chlorpyrifos, active ingredient 24 g (4 g of tebufenozide + 20 g of chlorpyrifos); flubendiamide, 3 g of active ingredient, at the beginning of the beet armyworm, most larvae are even below 2 years old spray.
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