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１９９８年渤海湾地区夏季东亚飞蝗（简称夏蝗）大发生，这是继１９９５年大发生后的又一次暴发。环渤海的沧州地区发生面积１０．３万ｈｍ２，发生面积及发生程度都是近几十年罕见的，给本地区的农业生产造成了很大威胁。本文在分析１９９８年夏蝗大发生的原因基础上，提...
In 1998, summer summer locust locust (summer locust) occurred in the Bohai Bay region. This is yet another outbreak following the 1995 large-scale occurrence. The area of Cangzhou in the Bohai Rim has an area of 103,000 hm2. The occurrence area and occurrence are rare in recent decades, posing a great threat to the agricultural production in this area. This article analyzes the causes of summer locust occurred in 1998, based on ...