The latest Chinese yam deformity causes and control methods

In the process of Chinese yam cultivation, due to the influence of adverse environment, cultivation methods, management methods and other factors, the organizational structure of Chinese yam changed in the process of growth, resulting in a variety of strange shapes, such as upper decentralization, lower decentralization, serpentine shape, flat head shape, foot shape, gourd shape and so on. So how to prevent and cure the malformation of yam? Come and have a look with the editor.

1. Foreign bodies in soil

Chinese yam is suitable to grow in sandy soil. If hard objects such as oil stones and bricks are mixed in the soil, the yam tuber will touch the hard object in the process of growth, and the growth point will be blocked and change its growth direction to form bifurcations, flat heads and other deformities.

Prevention and control methods: therefore, foreign bodies in the ditch should be carefully removed before planting, and manual digging should be carried out before the beginning of winter, so as to improve the rain and snow erosion in winter and spring, freezing and weathering so that the soil can be completely crushed. In addition, when backfilling the soil, we should carefully remove stones, bricks and other hard objects in the soil, and do not fill large blocks of soil into the ditch.

2. Blind use of seed fertilizer

When planting Chinese yam, in order to make the emergence strong and grow rapidly, farmers abuse all kinds of seed fertilizer before planting Chinese yam after ditching, so that because the seed fertilizer is used too much or is not fully mixed with the soil, the seed stem and seed fertilizer are accepted directly, resulting in buds and growing points being burned by fertilizer, resulting in deformities.

Prevention and control methods: the use of seed fertilizer must be reasonable, the dosage must be used strictly in accordance with the packaging instructions, and pay attention to the concentration. After application, it should be stirred evenly and fully to avoid direct contact with the seed stem.

3. Apply immature organic fertilizer

The growth period of Chinese yam is poor, so it needs a continuous supply of fertilizer to supply its growth and development, so it will apply sufficient base fertilizer before planting, and the base fertilizer is generally based on organic fertilizer, such as ring compost, compost, cake fertilizer and so on. When these fertilizers are not fully mature, a large amount of heat will be generated during field fermentation, resulting in root burns and later deformities.

Prevention and control methods: when applying organic fertilizers such as ring manure, compost and cake fertilizer, you must rett and mature in advance and then apply them, and remember that direct application will cause root burning. It is suggested that after planting, the fertilizer should be spread on the two rows of yam and pulled over again to make the soil and fertilizer mix evenly.

4. Underground pest damage

When planting Chinese yam, there are no pesticides in the ditch to control underground pests. Pests such as golden needle worms, grubs, mole crickets, root nematodes and other pests will cause harm to yam tubers during the whole growth period, such as biting off the growth point. causing the yam tuber not to elongate normally and cause deformities.

Control methods: to timely and early control of underground pests, when there must be underground pest damage, we can choose chlorpyrifos, avermectin or octane scale irrigation root control.

The above is the introduction of the causes and prevention methods of yam deformities. I hope I can help you. If you want to know more about it, please follow us.