Spinach is a common vegetable that is loved by people because of its rich nutrition. In the process of spinach growth, many pests and diseases will occur. Among them, root-knot nematodes are the most troublesome for farmers. Let's talk about the control methods of spinach root-knot nematodes.

Most of the parasitic spinach is the southern root-knot nematode. It is a very small animal. It is generally invisible to the naked eye and survives within 30 cm of the root of the plant. Due to the short duration of the nematode generation, the reproductive ability is very strong, and the new roots of the damaged spinach are constantly infested by it. Not only is it sucked a lot of nutrients, but also blocks the roots of the plants to transport nutrients. Although the plants do not die very quickly, the growth and development are affected, the yellowing is short and the growth is slow. In addition to harming spinach, Meloidogyne elegans also infects a variety of plants such as cucumber, loofah, tomato, celery, and oily wheat. After harvesting, the crop can still survive in the soil, and spread through irrigation water, diseased soil and diseased seedlings. The temperature is 25-30 degrees, which is most suitable for its survival. The soil moisture is suitable for root-knot nematode activity when the vegetable grows. The rainy season is more conducive to hatching and spreading infection. The occurrence of sand is more serious than that of clay, and the amount of land and flooded fields can be inhibited.

The following measures should be taken to prevent and cure spinach root knot nematode disease:

(1) After the crop is harvested, the roots of the old roots should be removed, and the roots should be completely sun-dried, so that the roots are completely dead, which is beneficial to reduce the source of pests and diseases.

(2) The seriously ill field should be rotated with onions, garlic and leeks.

(3) Liquid ammonia fumigation can kill the nematodes in the soil, use 30-60 kg of ammonia per acre, apply to the soil, cover the mulch for 6-7 days, then dig the soil for 2-3 days, then plant or Move the seedlings.

(4) 3-4 kg per mu in the seedling stage or at the time of sowing, and then watering, can effectively kill the nematodes in the roots, but can not be applied in the middle seedlings and large seedlings, so as not to cause products The residual drug is excessive.