Causes of Plant death of Welsh Onion and its Control measures

Welsh onion is one of the common vegetables, which is drought-tolerant and adaptable, and is cultivated all over the country, but the phenomenon of dead plants often occurs during cultivation, which brings economic losses to farmers. So what is the reason for the death of green onions? How to prevent and cure it? Let's take a look.

I. the cause of the death of Welsh Onion

1. High humidity

There is a layer of wax on the leaf surface of Welsh onion, which can mainly prevent the loss of water, but the transpiration is small, the overcast and rainy weather is more in summer and autumn, and the air humidity is high, which inhibits the transpiration of leaves, so the absorption of roots is weakened, and the nutrients absorbed are greatly reduced. plants in the case of lack of nutrients will cause the phenomenon of plant death, but also aggravate the degree of disease, resulting in more dead plants.

2. Disease

Due to years of continuous cropping, soil transmission is more serious, resulting in soft rot, Fusarium wilt, root rot and other diseases, coupled with moist soil, aggravation of the disease, resulting in more plant death.

3. Insect pests

As wheat straw and wheat husks are soaked and burned in the field, a large number of beetles in the soil survive, in this case, pest control should be strengthened, but many farmers ignore the reproduction of insect pests, resulting in underground pest breeding and killing a lot of plants.

II. Prevention and control measures

1. Rational rotation

When planting, we should choose the soil rich in organic matter, deep soil layer, high dryness and good drainage, and it is not suitable to plant onion crops in the first stubble, combined with sufficient base fertilizer for soil preparation, in making beds or ridging, timely spraying disinfectants and new high-fat membranes to disinfect and sterilize the soil.

2. Rational planting

Planting should be strictly in accordance with the requirements, reasonable and close planting, at the same time, we should do a good job in soil cultivation and slow seedling management, spray new high-fat film to protect internal moisture, prevent external waterlogging, protect fertilizer effect, promote new roots, and eliminate it at the same time, so as to avoid the phenomenon of retting root death caused by stagnant water in the field.

3. Strengthen the management

Fertilizer and water, especially nitrogen, phosphorus, potassium and calcium, should be supplemented in time at the stage of green onion death, especially attention should be paid to promoting root, strong plant and soil yield, and spraying Diguo Zhuangtieling during the onion white formation stage, so as to thicken the underground fruit transport conduit and improve the swelling vitality of the rhizome. High quality and high yield.

4. Pest control

The diseases of Welsh onion include downy mildew, black mildew, purple spot, insect pests such as leaf miner, root maggot, etc., targeted spraying control agents, plus new high-fat film, improve the utilization rate of pesticides, and at the same time improve the ability to resist disasters and reduce the amount of pesticides and chemical fertilizers. Reduce drug residues.

The above is the introduction of the causes and control measures of green onion death. I hope it can help you. If you want to know more about it, please follow us.