作　　者： ; ; ; ;

机构地区： 广东省农业科学院

出　　处： 《昆虫知识》 2006年第4期527-530,共4页

摘　　要： 测定椰心叶甲Brontispalongissima(Gestro)的过冷却点和结冰点。各虫态中过冷却点值以卵和蛹最低,分别为-9.8℃和-9.0℃,成虫较高,雌、雄成虫分别为-5.9℃和-5.5℃;幼虫的过冷却点最高,平均为-4.5℃。结冰点由高到低依次为2龄幼虫、5龄幼虫、4龄幼虫、1龄幼虫、3龄幼虫、雄成虫、雌成虫、蛹和卵,分别为-0.3,-0.8,-1.1,-1.3,-1.3,-2.4,-2.7,-5.4和-5.5℃。综合分析认为,蛹、卵的耐寒能力最强。根据广东地区常年平均气温分析了在自然条件下该虫各虫态越冬情况,但由于生物学特性的限制,越冬虫态主要是成虫、蛹。 Supercooling points and freezing points of all stages of palm leaf beetle Brontispa longissima （Gestro） were measured in a laboratory population from Futian, Shenzhen City. The mean supercooling points of the egg, first instar larva, second instar larva, third instar larva, forth instar larva, fifth instar larva, pupa, male and female adults were - 9.8, - 4.3, - 3.9, - 4.9, - 5.0, - 4.2, - 9.0, - 5.5 and - 5.9℃ respectively while their freezing points were -5.5, -1.3, -0.3, -1.3, -1.1, -0.8, -5.4, -2.4 and -2.7℃. The results revealed stronger cold hardness in pupa and egg stages than in other stages. An analysis based on the data of air temperature over the years in Guangdong area suggested that all stages of the pest could survive in winter in most of Guangdong, but mainly were adults and pupae due to its biological character.

关 键 词： 椰心叶甲 耐寒力 过冷却点 结冰点

领　　域： [农业科学] [农业科学] [农业科学] [农业科学]