Question: More rains have recently occurred and the occurrence of sheath blight in wheat fields is heavy. Some people worry that oxazole drugs such as oxazole will affect the heading of wheat and are afraid to choose it. Excuse me, what are the control effects of prochloraz and difolium on wheat sheath blight?
A: According to the article “Fungicide Screening for Controlling Wheat Sheath Blight†written by Wang Wenqiao et al., Institute of Plant Protection of Hebei Academy of Agriculture and Forestry Sciences, it was determined by experiments that oxazole and tebuconazole inhibit the mycelial growth of Rhizoctonia solani. The activity was significantly higher than those of carbendazim, thiophanate-methyl, prochloraz, jinggangmycin, hymexazol, thiram, chlorothalonil, propinol zinc, mancozeb, and other agents.
From the large-scale application of production in recent years, azoles, propiconazole, tebuconazole, diniconazole and other azole bactericides have good control effect on wheat sheath blight and have a longer effective period. At present, there are multiple single bactericide bactericides in China and their combination with Jinggangmycin registered for the control of wheat sheath blight. The azole bactericide has a certain inhibitory effect on crop growth. Improper use may cause adverse effects, but as long as the instructions for use of the product do not exceed the amount or frequent application of pesticides, generally there will be no adverse effects on the growth of wheat. In particular, the inhibitory effects of oxazole, propiconazole, and other agents on crops are weak, and the normal use of spring wheat during its vigorous growth period will not adversely affect the growth of wheat. In the field where the azole fungicide has been used normally in the previous period, if you want to apply it again in the short term, you should use Jinggangmycin or mix the azole fungicide with Jinggangmycin.
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