The taste of leeks is delicious, and it is a favorite vegetable. The warmth and wet conditions of the protected area and greenhouse leeks are suitable for the popular development of various pests and diseases. To prevent and control leek pests and diseases, comprehensive control measures should be taken to select high-efficiency, low-toxicity, low-residue or biological pesticides, rational mix, alternate use of different mechanisms of action or agents with negative cross-resistance to overcome and delay the emergence of pest and disease resistance. development of. It is strictly forbidden to use phorate (3911), bismuth phosphorus (Suhua 203), parathion (1605), monocrotophos, phosphatidamine, methamidophos, dimethoate, methylthiophosphorus, methyl iso-liu Highly toxic and high-residue pesticides such as phosphorus, fluoroacetamide and chlordane, and strict control of the interval between pesticides, so that the pesticide residue does not exceed the allowable value prescribed by the state to ensure the safety of consumers.
The propagation condition of the gray fungus of the leek is the conidial spores and conidia of the diseased part of the disease. Whenever the amaranth is cut, the spores are scattered on the soil surface, and the conidia are spread by irrigation water, farming operations, etc. On the leaves, the infection is onset. The pathogen of the disease is prone to spread under low temperature (16 ° C ~ 30 ° C), high humidity (86%), and insufficient sunshine.
Prevention and control of gray mold: use 260~300g of 10% procymidone smoke agent, disperse and ignite, close the shed room for fumigation overnight; or use 6.5% bacteria · mildew dust, 500g per acre, 7 days spray 1 Or; spray with 65% sulfur bacteria and mildew 1000 times solution; or 50% isourea 1000 to 1600 times solution, once every 7 days, even spray 2~3 times.
Prevention and treatment of epidemic diseases: use 5% chlorothalonil powder, 1000g per acre, spray once every 7 days, even spray 2~3 times. In the early stage of the disease, 60% of the frostbite copper 600 times solution; or 72% of the frostbite watering agent 800 times solution; or 72% frost urea·manganese zinc or 60% succinylphosphine aluminum 600 times solution for rooting or spraying, 10 days Spray (irrigation) 1 time, cross use 2~3 times.
Prevention and treatment of cockroaches: 1 Ground application. In the adult priming period, 2.5% trichlorfon powder is applied to the ridge, 2~2.6 kg per mu; or 40% phoxim 1000 times solution is sprayed at 9-11 o'clock in the morning; or 2.5% deltamethrin 2000 times solution; It can also spray 75% chlortetracycline after the pests are poured into the water, with 6~10 grams per acre. The effect is better. 2 irrigation roots. Early spring in March or mid-September, 40.7% of chlorpyrifos 600 ml; or 1.1% of ginseng powder 2~4 kg per mu; or 40% phoxim 100 ml per mu; or phoxim, chlorpyrifos Mix (1+1) 80 ml, dilute to 100 times solution, remove the sprayer nozzle, administer the medicine at the root of the leek, and then water. If the pests and diseases are concurrent, the above agents can be mixed and used, which can serve the purpose of treating both diseases and insects.
The propagation condition of the gray fungus of the leek is the conidial spores and conidia of the diseased part of the disease. Whenever the amaranth is cut, the spores are scattered on the soil surface, and the conidia are spread by irrigation water, farming operations, etc. On the leaves, the infection is onset. The pathogen of the disease is prone to spread under low temperature (16 ° C ~ 30 ° C), high humidity (86%), and insufficient sunshine.
Prevention and control of gray mold: use 260~300g of 10% procymidone smoke agent, disperse and ignite, close the shed room for fumigation overnight; or use 6.5% bacteria · mildew dust, 500g per acre, 7 days spray 1 Or; spray with 65% sulfur bacteria and mildew 1000 times solution; or 50% isourea 1000 to 1600 times solution, once every 7 days, even spray 2~3 times.
Prevention and treatment of epidemic diseases: use 5% chlorothalonil powder, 1000g per acre, spray once every 7 days, even spray 2~3 times. In the early stage of the disease, 60% of the frostbite copper 600 times solution; or 72% of the frostbite watering agent 800 times solution; or 72% frost urea·manganese zinc or 60% succinylphosphine aluminum 600 times solution for rooting or spraying, 10 days Spray (irrigation) 1 time, cross use 2~3 times.
Prevention and treatment of cockroaches: 1 Ground application. In the adult priming period, 2.5% trichlorfon powder is applied to the ridge, 2~2.6 kg per mu; or 40% phoxim 1000 times solution is sprayed at 9-11 o'clock in the morning; or 2.5% deltamethrin 2000 times solution; It can also spray 75% chlortetracycline after the pests are poured into the water, with 6~10 grams per acre. The effect is better. 2 irrigation roots. Early spring in March or mid-September, 40.7% of chlorpyrifos 600 ml; or 1.1% of ginseng powder 2~4 kg per mu; or 40% phoxim 100 ml per mu; or phoxim, chlorpyrifos Mix (1+1) 80 ml, dilute to 100 times solution, remove the sprayer nozzle, administer the medicine at the root of the leek, and then water. If the pests and diseases are concurrent, the above agents can be mixed and used, which can serve the purpose of treating both diseases and insects.
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