论文部分内容阅读
【目的】为明确麦长管蚜Sitobion avenae(Fabricius)虫龄鉴别特征,达到快速鉴别的目的。【方法】在成像观察的基础上,测定无翅型和有翅型个体不同虫龄的体长、体宽、头壳宽、触角长、腹管长和后足胫节长6项指标。【结果】麦长管蚜不同翅型个体的体长、体宽、头壳宽、触角长、腹管长和后足胫节长在虫龄间均存在显著差异,其中体长、体宽、头壳宽和触角长在相邻虫龄之间重叠程度大,后足胫节长的重叠百分比极小或无重叠;除有翅型个体4龄若蚜和成蚜之间存在13.93%的重叠外,腹管长在不同翅型的其他相邻虫龄之间重叠百分比均极小或无重叠,说明后足胫节长和腹管长可作为虫龄鉴定的主要特征。翅、触角和尾片的其他外部形态特征在虫龄间也存在一定差异:3-4龄有翅型若蚜和成蚜虫个体前胸的膨大程度及其翅的长度明显大于同一龄期的无翅型个体,可用于蚜虫翅型的分辨以及3-4龄有翅若蚜和成蚜的鉴别;麦长管蚜1和2龄若蚜触角均为5节,3-4龄若蚜和成蚜的触角均为6节;同时,除了成蚜具有完整的尾片外,1-4龄若蚜尾片均不发达,说明触角的节数和尾片的发达程度可作为麦长管蚜不同龄期形态鉴别的辅助特征。【结论】以腹管和后足胫节作为麦长管蚜虫龄鉴别的主要特征,配合其他辅助特征,如翅的大小、触角的节数以及尾片的发达程度等,可达到快速鉴别不同翅型不同龄期蚜虫的目的。
【Objective】 The objective of this study was to identify the age characteristics of Sitobion avenae (Fabricius). 【Method】 Six indexes of body length, body width, head width, antenna length, abdominal length and hindfoot length were measured on the basis of imaging observation. 【Result】 Body length, body width, shell width, antenna length, length of abdomen and tibiofibular length of hindfoot were all significantly different among different winged individuals. Body length, body width, Head width and antenna length overlap between adjacent insect ages, and the overlap percentage of hind tibia length is very little or not overlapped. There is a 13.93% overlap between the 4-instar aphids and aphids In addition, the percentage of overlap between other adjacent insect instar of different length and length of the abdominal tube was very little or no overlap, indicating that the length of the hind tibia and the length of the abdominal tube can be used as the main characteristics of insect age identification. The other external morphological characteristics of wings, antennae and tail were also different in insect age: the extent of enlargement and the length of wings of 3-4-year-old winged Aphis gossypii and aphids were significantly greater than that of the same age Wing-shaped individuals, can be used for the identification of aphids wing-type and 3-4-year-old winged if aphids and aphids identification; wheat aphid 1 and 2-year-old aphid antennae are 5, 3-4 aphids and into Aphid antennae are 6; the same time, in addition to adult aphid has a complete tail, the first instar 1-4 if the apocrine tail are not developed, indicating the number of antennae and the tail of the degree of development can be used as aphid Auxiliary characteristics of morphological identification at the same age. 【Conclusion】 Abdominal tube and hind tibial tibia are the main characteristics of the identification of the aphid age of wheat aphid. Combined with other auxiliary features, such as the size of the wing, the number of antennae and the developed degree of the tail piece, rapid identification of different winged Aphids of different age purposes.