What are the causes of wheat root rot? How can it be prevented?

Wheat root rot is caused by Cyclospora bacteria, which is a fungal disease. The disease is most severe when the soil is too dry or too wet, and even more severe when the soil is frozen at the seedling stage. Diseases of wheat leaves are related to temperature and leaf age.

The occurrence of root rot is related to a variety of factors, such as soil texture, compaction degree, sowing depth, continuous cropping, seed disease, etc., which can promote the occurrence of root rot at seedling stage. The incidence of wheat leaves is closely related to climatic conditions, pathogen density and host resistance.

Wheat root rot is one of the main diseases in wheat-growing areas of China. It not only harms wheat roots, but also infects wheat stems, leaves, and ears. When the disease is severe, the number of seedlings, the number of grains and the weight of grains will be reduced, and the yield of wheat will be reduced.

From the current monitoring of wheat root rot, the pathogen of wheat seeds themselves, wheat continuous cropping plants, and the promotion of straw returning technology lead to an increase in the field of disease, and a large number of root rot bacteria are the main reasons for the occurrence of root rot. High temperature and rain in the later stage of growth can cause a large-scale epidemic of root rot.

At the same time, it is found that the wheat is sown too deeply, or sown too late, resulting in the slow emergence of wheat seedlings in the field is generally serious, the soil is poor, the wheat growth is poor or the field water and fertilizer is insufficient, the plant disease resistance is poor, and the wheat suffering from frost damage or drought also often aggravates the occurrence of root rot. According to the main reason for the occurrence of wheat root rot and the general law of production, by selecting wheat varieties that are generally resistant to root rot, so that wheat seeds can be sown without pathogens or reach the best period, sow seeds in high soil humidity or drought, avoid sowing too late and too deep, rotate with peanuts, soybeans and other grasses, control the number of straw returned to the field, or do not return straw to the field, which can greatly reduce the source of bacteria in the field and reduce the prevention of root rot.

By increasing the use of organic fertilizer, nitrogen, phosphorus and potassium, precision mechanical sowing is carried out to prevent excessive population density, and at the same time avoid field floods and droughts, balance the best water, so that the plants can improve disease resistance, and can effectively prevent and control hazards.

It may be that there are many rainy days, the temperature is relatively low, the field management is not in place, and the continuous cropping often leads to the occurrence of root rot in wheat. Crop rotation should be stubble, before planting wheat, seeds and pesticides should be mixed together, when applying base fertilizer should be nutritionally balanced, after wheat germination can be supplemented with trace elements so that control can be carried out.

It may be because the soil temperature is too high, or the roots are damaged, or it may be caused by too much water for irrigation, insufficient light, or too much soil stickiness, you can do a good job of drainage management, or fertilization, you can also dig ditches on both sides, or remove weeds, so as to prevent the occurrence of wheat root rot.

The fertility in the soil is not enough, it rains a lot, the amount of water is too large, the soil is not well drained, there is no way to get light, and the soil is too sticky. To reduce the amount of wheat planted, to ensure the appropriate planting density, to strengthen ventilation, not to water frequently, to timely replenish organic fertilizer.

It can be distinguished by the time of onset and the symptoms of the onset, wheat root rot is mainly manifested in the appearance of rot, and the general part of the rot is in the root. Stem base rot usually occurs on rhizomes or leaves.

It can be determined according to the form of the manifestation, it can be determined according to the location, it can be determined according to the growth of the plant, it can be determined according to the color, and it can also be determined according to the decay.

Depending on the time of occurrence and the location of occurrence. It depends on the specific symptoms, and the bacteria involved are different.

To prevent and control wheat root rot, it is necessary to choose varieties with strong disease resistance and high yield, and before sowing, the wheat seeds should be soaked in the prepared pesticide for 24 hours to reduce the probability of infection of the plant, and the cultivation soil should be sprayed with fungicides to eliminate the bacteria in the soil and avoid wheat being infected with root rot.

1. Sell and sell disease-resistant products

If you want to reduce the probability of infection with root rot in Qiaobend wheat, you should choose varieties with strong disease resistance and stress resistance, such as Jiusan 112, Jiusan 82 or Jiusan 104, the seedlings of these varieties are more resistant to root rot, or choose varieties such as M13, Yuan 436 or Xiaodou Stuffy Yuan 463, which are more resistant to root rot.

2. Seed dressing method

When controlling wheat root rot, it is necessary to select seeds with full grains and no damage to the disease, and then put the wheat seeds into the prepared pesticide to soak for a period of time, so that the probability of infection and disease of the plant is reduced, and then the wheat seeds should be placed in the sun to dry for 1-2 days to make them grow healthily.

3. Soil conditions

Before sowing and propagating wheat, it is necessary to plough 30 cm of soil, remove broken roots and gravel in the soil, make the soil softer, and then spray fungicides into the soil to eliminate pathogenic fungi and insect eggs in the soil, and wheat should be rotated with non-host crops for 1-2 years to improve its disease resistance.

4. Spray the agent

When breeding wheat, it is necessary to regularly observe the growth state of the plant, if the wheat is found to have signs of root rot, it is necessary to spray carbendazim 1-2 times every other week to disinfect and sterilize it, maintain the normal growth of wheat, and in the rainstorm season, to discharge the stagnant water in the soil for the wheat, so as to avoid rot of the roots of the plant.