Green onion is a common seasoning vegetable in our life. Although the planting prospect is good, but the planting process often encounters pests and diseases, once the control is not timely, it will affect the growth of the green onion, which will lead to the reduction of the yield and quality of the green onion, resulting in the income of farmers. decline. Therefore, rational use of drugs can effectively prevent and control the onion pests and diseases, and improve planting efficiency. Below, Huinong.com Xiaobian will introduce the common methods of prevention and treatment of common pests and diseases, and hope to help everyone.
Common pests and diseases of green onions mainly include rickets, purple spot, downy mildew, white blight, gray mold, beet armyworm, spotted fly, thrips, aphids and so on.
Underground pest
During the sowing period, 90% of the 100% trichlorfon SP 0.15 kg was mixed with 5 kg of bean cake, and the bait was made into 1.5 kg/mu to 2.5 kg/mu. It was sprinkled on the ground near the seedlings in the evening.
Tripping disease
When the strain is 1%, use 72.2% propamocarb AS100 ml/mu, or 50% dimethomorph WP60 g/mu, or 25% azoxystrobin SC34 g/mu, spray 50 kg of water. Spray once every 6 days to 7 days, and continuously control 2 times to 3 times.
Purple spot
When the diseased plant is first seen, use 10% difenoconazole WP75 g/mu, or 50% iprodione WP100 g/mu, spray 50 kg of water. Spray once every 6 days to 7 days, and continuously control 2 times to 3 times.
Downy mildew, white blight
In the early stage of the disease, spray 46.1% copper hydroxide WG75 g/mu, or 25% azoxystrobin SC34 g/mu, or 75% chlorothalonil WP100 g/mu. Spray once every 6 days to 7 days, depending on the condition, continue to prevent 2 to 3 times.
Gray mold
When the diseased leaves are first seen, spray on water with 25% azoxystrobin SC34 g/mu or 10% difenoconazole WP75 g/mu, or 50% iprodione WP100 g/mu. Spray once every 6 days to 7 days, depending on the condition, continue to prevent 2 to 3 times.
Beet armyworm
Use 2 billion PIB / ml cabbage genus nuclear polyhedrosis virus SC90 g / mu ~ 120 g / mu, or 30% indoxacarb WG20 g / mu, or 20% chlorantraniliprole WG 15 g / mu, or 10 % flurazepam SC 30 ml / mu, or 5% chlorfluazuron EC 50 ml / mu, spray on water. Spray once every 6 days to 7 days, and continuously control once or twice.
Liriomyza, hummer, aphid
Spray with water from 10% cyanamide, SC18 g/mu to 25 g/mu, or 20% chlorfenapyr WG17 g/mu. Spray once every 6 days to 7 days, and continuously control once or twice.
Note: For the control objects in different periods, choose the pesticide variety on the road and use it at the appropriate time. In order to prevent or slow down the generation and development of pest resistance, the drugs should be alternately rotated, and each pesticide should be continuously applied no more than 3 times. When a variety of pests and diseases occur, it is advisable to mix drugs. During the application process, the killing of beneficial organisms should be minimized to avoid phytotoxicity to adjacent crops.
The above is the chemical prevention and control program for the common pests and diseases of green onions organized by Huinong. The above-mentioned medicaments are for your reference only. The growers can carry out prevention and control according to the actual situation.
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