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本文采用田间温度控制试验资料,用数理统计的方法分析高温控制范围、控制时间和控制频率与大棚黄瓜霜霉病的发生期、流行期、发生程度以及产量的关系,并建立了统计相关模式,确定了高温控制生态防治方法的技术指标。最高温度、高温控制时间和控制频率这3个主要指标与病情和黄瓜产量的关系非常密切,最高气温每升高1℃,发病期和流行期将推迟3—5天,病叶率降低13—15％,黄瓜产量可增长10％左右。在一定范围内,控制时间越长,频率越高,则发病期和流行期越晚,病情越轻,产量越高。研究证明,高温控制方法是一个有效的生态防治方法,具有明确的气候生态学依据。
In this paper, field temperature control test data were used to analyze the relationship between high temperature control range, control time and control frequency and the occurrence, prevalence, occurrence and yield of greenhouse cucumber downy mildew by using mathematical statistics method. And the statistical correlation mode was established, Determine the high temperature control method of ecological control methods of technical indicators. The three main indexes, the highest temperature, the high temperature control time and the control frequency, are closely related to the disease condition and the yield of cucumber. The temperature and the epidemic phase will be postponed for 3-5 days for every 1 ℃ rise in the maximum temperature, and the disease leaf rate will be reduced by 13- 15%, cucumber yield can increase about 10%. Within a certain range, the longer the control time, the higher the frequency, the later the onset and prevalence, the lighter the disease and the higher the yield. Studies have shown that high temperature control method is an effective ecological control methods, with a clear basis for climate ecology.