高山草原主要蝗虫的生物学特性

据１９８９￣１９９４年的调查研究，甘肃夏河县革加高山草原共有蝗虫３０余种，其中主要种类有狭翅雏蝗、宽须蚁蝗、红翅皱膝蝗鼓翅皱膝蝗、小翅雏蝗和邱氏异爪蝗根据发生时期的不同，可将草地蝗虫划分为早、中、晚３种类型。蝗蝻的发育历期在种类之间差异较大以早期发生的宽须蚁蝗最长，而晚期发生的小翅雏蝗最短。从孵化到成虫死亡所经历的时间，以晚期发生的种类最短。狭翅雏蝗的繁殖力在６种蝗虫中最高，每雌产卵量平均达１２５

INVESTIGATIONS OF THE SPECIES AND BIOLOGY OF GRASSHOPPERS IN HIGH MOUNTAIN GRASSLAND IN GANSU PROVINCE

30 grasshopper species, in which Chorthippus dubius (Zub. ), Ch. fallax (Zub. ), Myrmeleotettix palpalis (Zub. ), Angaracris rhodopa (F. -W. ) , A. barabensis (Pall. ), Euchorthippus cheui Hsia were dominant, were found in the investigation in Ganjia High-Mountain Grassland, Xiahe County, Gansu Province in 1989-1994. In accordance with the different occurrence times, these grasshopper species were divided into three occurrence types, namely, the early-, middle- and late-period types. There were obvious differences of developmental durations in nymphal stage among these types, that of Ch. fallax, belongs to early-period types, was longest, while that of A. baradensis, belongs to late-period type, was shortest. The whole developmental duration, from hatching of egg to the death of adult, of late-period type was shortest. A-mong the six dominant species, the fecundity of Ch. dubius, which average was up to 125 eggs/female, was highest.