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研究并测定了春、夏玉米丝黑穗病原菌冬孢子对刺激物及杀菌剂的敏感性。结果表明,石家庄地区夏玉米丝黑穗病原菌对CuSO4、H2O2、NaOH等的敏感性与春玉米区病原菌无明显差别,但对4种杀菌剂的敏感性不同。每种杀菌剂的5个浓度下,丝黑穗病原菌冬孢子萌发率显示,夏玉米区丝黑穗病原菌冬孢子对戊唑醇、福美双的敏感性高于春玉米区,当戊唑醇和福美双质量浓度分别为0.01μg/mL和6.25μg/mL时,夏玉米区萌发率较低,为21.50%和18.33%,春玉米区分别为33.97%和41.73%;而对多菌灵的敏感性低于春玉米区。当多菌灵质量浓度为0.05μg/mL时,夏玉米区萌发率为16.75%,春玉米区为9.66%,但对苯醚甲环唑的敏感性与春玉米区无明显差别。
The sensitivities of winter spores of spring and summer maize smut to stimulants and fungicides were studied and determined. The results showed that there was no significant difference between the pathogen of CuSO4, H2O2, NaOH and so on in summer maize head in Shijiazhuang, but different to the four fungicides. The rate of teliospore germination of the head smut pathogens at 5 concentrations of each fungicide showed that the susceptibility of teliospore smuggles to tebuconazole and thiram in summer maize was higher than that of spring maize, The germination rates of summer maize were lower at 21.50% and 18.33%, respectively, at the two concentrations of 0.01μg / mL and 6.25μg / mL, respectively, and 33.97% and 41.73% respectively in spring maize. The sensitivity to carbendazim Lower than the spring corn area. When the concentration of carbendazim was 0.05μg / mL, the germination rate in summer maize was 16.75% and that in spring maize was 9.66%. However, the sensitivity to difenoconazole was not different from that in spring maize.