Causes of dead spike in wheat and its control measures

In recent years, many farmers have found that dead spikes often occur in the late stage of wheat growth, resulting in a reduction in wheat varieties and yield, and in serious cases, the yield is reduced by more than 50%, which brings huge economic losses to farmers. So what is the cause of the dead spike of wheat? How to prevent and cure it? Let's take a look.

First, the cause of the dead ear

1. Sheath blight. The disease is caused by oval brown disease spot on the leaf sheath of 1-3 nodes at the base of the stem. after the pathogen invades the stem, it will form brown oval eyelike spots, resulting in the necrosis of the stem, and finally lead to the lack of fertilizer and water supply of the plant.

2. Total erosion disease. The main symptom is black foot and white ear, the disease is that the root will turn brown or black, the plant is short and sparse, the leaf turns yellow gradually, the wheat awn turns white after poplar blossom, the whole wheat ear will gradually turn into white ear, root fertilizer, until the plant dies.

3. Root rot. The main symptoms are root fertilizer, white blight of wheat ear, which can occur in the whole growing period of wheat. the pathogen invades the root system and seedlings, spreads with the help of wind and rain, and suffers the most serious damage after wheat poplar flowering. finally, the root system rotates and the leaves wither and die.

4. Scab. It showed seedling rot and stem rot in the early stage and ear rot in the later stage. Water-immersed light brown disease spots appeared on the glume of the spikelet at the initial stage of the disease, and pink mildew layer was produced after gradual spread.

5. Underground pests. Underground pests bite the roots and lead to dead plants. many farmers do not treat the soil in time when planting, but the number of underground pests increases gradually, especially golden needle worms, which often lead to the occurrence of dead seedlings and lack of seedlings.

6. Mechanical injury. Carelessness in ploughing, weeding, topdressing and irrigation will cause stem breakage, damage of transport tissue, dead seedlings or dead spikes of wheat, and natural factors such as strong wind and rain, hail and so on.

II. Prevention and control measures

The main results are as follows: 1. The dead ear caused by sheath blight can be mixed with chemicals during sowing, which can effectively delay the onset of sheath blight for more than 100 days and reduce the degree of disease in the later stage; second, it is sprayed with triadimefon or triadimefon from wheat turning green to jointing stage, which can effectively control the degree of disease and reduce the number of deaths in the later stage.

2. For the dead ear caused by total erosion disease, timely treatment of wheat straw and wheat stubble after harvest, reducing the amount of bacteria in the field, not using seeds with total erosion disease during sowing, or chemical dressing during sowing can play a better role in preventing and reducing the degree of disease.

3, the dead ear caused by root rot, one is crop rotation, the other is soil treatment, mixing soil with carbendazim, spreading in front of cultivated land, seed dressing, or spraying trimethoprim and trimethoprim spray to control the disease.

4. Scab. To spray control in advance, you can use carbendazim or fruit power with 450 kg of water, uneven spray on wheat ears, spray once after rain to ensure a good effect.

5. The dead spike caused by underground pests can be controlled by seed dressing and soil treatment, and the effect is better when methyl isofenphos granules or phoxim granules are used to spread evenly before ploughing.

6. if mechanical damage is caused, man-made mechanical damage should be avoided as far as possible in the operation of weeding, topdressing and irrigation, and reasonable close planting, scientific management and lodging should be prevented at the same time.

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