The common pests of vegetables include aphids, whitefly, beet armyworm, etc. According to the characteristics of different pests, how to choose the right medicine? Let's follow the small series to understand.
1. Control vegetable aphids. Imidacloprid, recommended dose of 1-2 grams of active ingredient / acre; acetamiprid, recommended dose of 0.45 -0.6 grams of active ingredient / acre; pymetrozine, 5 grams of active ingredient; 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.
2, 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 application at the nymphal initiation period.
3. 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, the recommended dosage is 2.4g active ingredient/mu; Ingredients 2.5 -3.5 g / mu (for example, 5% hexaflumuron EC 50-70 ml / mu); chlorpyrifos active ingredient 20 - 24 g / mu (for example, 40% chlorpyrifos EC 50-60 ml / mu); methylamino The avermectin has an active ingredient of 0.3-0.5 g/mu (for example, 1% carbaryl avermectin emulsifiable concentrate 30-40 ml/mu), and sprays 50 kg of water once. It is recommended to spray at the young age of 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.
4. Prevention and control of the diamondback moth. Emamectin, the recommended dosage is 0.15-0.25g active ingredient/mu; fipronil, the recommended dosage is 1-2g active ingredient/mu; chlorfenapyr, the recommended dosage is 3.35-5g effective Ingredients/mu; indoxacarb, recommended dosage is 3g active ingredient/mu; chlorfenapyr, 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.
5, 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.
More pesticide knowledge , please pay attention to China Pesticide Network
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Description of hinged stop ring
1. Stop Collar type:Hinged type and slip on type
2. Size: 4 1/2''~20'', according to the casing OD.
3. Usage: for well drilling area, combine with the centralizers, such as bow spring centralzers, rigid centralizers.
Stop Collar
Stop Collar,API Stop Collar,Stop Ring Sets,Rigid Centralizer Set
Puyang Junhong Rubber Co., Ltd. , https://www.pyjhxs.com