Be alert to the damage of wheat from Helminthiasis

In the most recent period, wheat growers often used telephone calls to report that young wheat seedlings had chlorotic leaves with yellowish green spots and chlorosis-like spots. For this reason, Zhao Yingliang, an agrichemical expert from the newspaper, looked and found that the reasons were: The burning of roots caused by the use of inferior topdressing, coupled with the hot weather, insufficient supply of fertilizer, and the danger of daily burns. The second is the disease caused by sheath blight. The third is the damage of wheat root rot from Helminthiasis syndrome. Among them, Helminthosporosis Syndrome is the main pathogen of wheat root rot.

Helminthes spp. in wheat root rot is a typical multi-stage disease in the whole wheat growth period, which occurs from seedlings to heading and fruiting period. Seedling stage caused by bud rot and seedling blight, the adult stage led to early leaf withering and ear rot, root rot, stem rot, leaf spot, black embryo, grain lean and so on. Among them, the occurrence of leaf spot was the most common and the most serious. Seeds with heavy shoots and seedlings cannot germinate or just sprout, they turn brown and rot cannot be unearthed. Lightly germinated soil but the coleoptile or other underground parts of the disease, mostly died before the winter or weak seedlings. Root rot and stem rot appear brown lesions on the coleoptiles, underground stems or larvae at the seedling stage, rot or necrosis of the local tissues, often causing brown lesions near the tiller node of the underground stem base, and brown fusiform marks on the leaf sheath near the ground.

Zhao Yingliang pointed out that the cause of this year's root rot infection from Helminthiasis was: First, wheat was sown at the time of planting, and wheat was not coated. The second reason is that irrational fertilization cannot scientifically measure soil fertilization.

Control methods: First, wheat white seeds are strictly prohibited, and 20 ml of medamine or 10 ml of light shield can be coated per mu. The second is to increase the organic fertilizer, biological bacteria and trace elements. The third is the spraying of mancozeb 600 times per mu (or myclobutanil 1000 times or thiophanate-methyl 600 times) + 15 milliliters of sea chlorophyll + 40 phosphorus and potassium in the early stages of wheat onset. 2-3 consecutive times, 5-7 days apart.

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