The temperature affects the onset and speed of the incidence of wheat scab. If the temperature is high after wheat heading, the diseased ears in the field will appear earlier. When the average temperature is lower than 13.7 ° C, it usually does not occur. The temperature affects the incubation period of scab, when the average temperature is 15 °C, the incubation period is 7-8 days; at 20 °C, it is 4-5 days; at 25 °C, the continuous high humidity 36 hours incubation period only needs 2 If the temperature is not suitable, the incubation period will be extended, up to 15 days, and the low temperature will delay the occurrence of the disease. If the temperature is high, it is easy to cause the disease to burst early, and the average temperature after wheat heading is generally When it reaches or exceeds 15 °C, it is suitable for epidemics. Special changes in temperature have a role in accelerating or delaying the disease.
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