How to control the withered leaves of leek

Leek is a common market in our life, it is nutritious and deeply loved by consumers, but there is a phenomenon of withered leaves of leek when planting, resulting in a serious reduction in production of leek, or even no harvest. So how to control the withered leaves of leek? Let's get to know it.

1. Dead leaves caused by diseases

The withered leaves of leek caused by the disease are mainly blight and gray mold. Waterlogged spot appears after the leek is infected with the blight. The spot appears white mold layer when it is wet and turns yellow when it is dry. Grey mold disease occurs when the leaves appear white or light brown disease spots, with the development of the disease, the disease spots gradually expand, it is best to cause the disease leaves dry, wet diseased leaves appear gray-green mold layer.

Prevention and control methods: the occurrence of epidemic disease is related to drainage, so it is necessary to do a good job of drainage and dampness during cultivation, and it can be prevented and treated by spraying Ruidu and Metalaxyl manganese and zinc when it occurs. In addition to drainage, Botrytis cinerea can also be sprayed with powder rust Ning and Sukeling for control.

2. Dead leaves caused by insect pests

There are root maggots, onion flies and mushroom mosquitoes, root maggots will drill into the bulb to eat, and the damaged bulbs will be eaten by the root maggots, causing the leaves to rot, wither and die. Onion flies do harm to larvae and eat leaf tissue, resulting in leaf yellowing, softening and lodging; the same is true of late-eyed mushroom mosquitoes, which absorb leaf juice, resulting in leaf loss, withering and death.

Control methods: root maggots can be poisoned by root drying, plant ash or phoxim granules mixed with soil, onion flies can be irrigated with phoxim EC or quinathion EC in larvae, and aphid lice can be used to control adults during Eclosion period. Mosquitoes like shade, damp and humus, which can be trapped and killed by frequency vibrating insecticidal lamp.

3. Physiological diseases

The withered leaves of leek are also related to soil acidification, nitrogen poisoning, high temperature and low temperature above 35 degrees, and lack of trace elements such as calcium, boron, manganese and so on.

Prevention and control methods: treat acidic fertility as little as possible so as not to cause soil acidification, soil acidity can be adjusted by plant ash; organic fertilizer should be fully mature; high temperature in summer should be cooled by spraying water in time, and heat preservation measures should be taken in winter. Before planting, base fertilizer was applied, mainly organic fertilizer and farm manure, which provided a variety of necessary nutrients for plants, and foliar fertilizer spraying could be used to provide microelements for plants during the growing period.

The above is the introduction of how to control the withered leaves of leek. I hope it can help you. If you want to know more about it, please pay attention to us.