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利用环渤海2类典型蝗区飞蝗发生期资料和同期气候资料,对不同蝗区气候变化和飞蝗发生期的关系进行对比分析。结果表明:沿海蝗区和洼淀蝗区气候的差异是导致飞蝗发生期差异的重要因素,影响飞蝗发生期的主要气候因子为气温;沿海蝗区3、4月气温偏低0.2℃～0.4℃,导致夏蝗三龄期以前飞蝗发生期比洼淀蝗区偏晚2～3d,沿海蝗区其他月份气温偏高,气温的累积效应导致夏蝗三龄期以后发生期偏早;秋蝗发生期变化幅度小于夏蝗,与入夏后气温变异系数小相对应;20世纪90年代以来2类蝗区气温变化幅度不同是导致飞蝗发生期变化幅度不同的主要原因,且夏蝗发生期早晚与3、4月气温高低密切相关。
Based on the data of the occurrence of migratory locusts in the two typical locusts around the Bohai Sea and the climatic data of the same period, the relationship between the climate change and the occurrence of migratory locusts in different locust areas was analyzed. The results showed that the differences of climate between the coastal locusts and the depression locusts were the important factors leading to the differences in the occurrence of locusts. The main climatic factors influencing the occurrence of locusts were the temperature. The temperature in March and April in the coastal locusts was 0.2 ℃ ~ 0.4 ℃, which led to the occurrence of Locusta migratoria less than 2 ~ 3d later than that of the locust of Locusta migratoria before the third instar of Summer locust. The temperature in other locust months was higher than that of other locusts. The cumulative effect of temperature resulted in the earlier occurrence of Locust locusts after the third instar. The change range of autumn locusts was less than that of summer locusts, which corresponded to the small coefficient of variation of temperature after entering the summer. The difference of temperature changes between the locusts of two locusts in the 1990s was the main reason for the different amplitude of the locust locusts. Early and late occurrence of 3, 4 month temperature is closely related.