Wheat root rot is a fungal disease caused by the infection of the fungus Helminthosporium. The pathogenic bacteria latent in the seeds and in the soil, with the diseased plant residues can survive for 1 to 1.5 years, the whole growth period of the wheat can be pathogenic. The initial infection of the pathogens damages the wheat roots and seedlings, re-infestation by wind and rain, wheat damage after flowering The heaviest, the roots produce brown or black lesions, and finally rot, the diseased plants showed "diseases and droughts," and "dry white spikes" appeared, and they became dry and dead.
For the prevention and control of root rot, serious plots should be changed for 1 to 2 years in rotation, and the control of chemical agents should take the approach of â€œa single occurrence of governance and the occurrence of a complete blockâ€. In particular, do the following: 1. Use 50% of Fujimami 1.5 to 2 kg per 667 square meters of land, and spray 20 kg of fine soil (sand). 2. Before the seeding, 0.03%~0.04% of the seeds of the special azole seedlings were used for planting, and then combined with the control of sheath blight, 12.5% â€‹â€‹of the special azole was sprayed with 2,500 times of leaf surface. Compared with the control field, the treated wheat field had 5 to 8 secondary roots, 0.5 to 2 tiller numbers, and 5.2 to 12 cm plant height. The roots were well developed, and the stems were thick and not lodging.
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