通过对广西三化螟蛾各代发生期资料的统计分析,发现各县三化螟蛾发生期之间有着密切的相关关系。在同一代中,随着纬度的升高,发生期相应推迟。因而我们利用这种关系就可以进行开展对三化螟蛾各代发生期的异地预测。这对指导防治工作都具有现实意义。 Through the statistical analysis of the occurrence data of three generations of Pythium moth in Guangxi Province, it was found that there was a close correlation between the occurrence of Pythium argus in each county. In the same generation, the occurrence of a corresponding delay was postponed as latitude increased. Therefore, we can use this relationship to carry out the off-site prediction of the occurrence of each generation of Pythium moth. This is of practical significance in guiding and controlling the work.