鼓翅皱膝蝗生态学特性研究

在甘肃省夏河县对鼓翅皱膝蝗的种群结构、数量变动、空间格局及动脉进行了系统研究。鼓翅皱膝蝗1a发生1代，以卵在土中越冬，翌年5月中旬开始孵化出土，6月上旬达到出土高峰，此期蝗虫种群仅由1龄和2龄蝗蝻组成，其中1龄蝗蝻占81.8％，2龄蝗蝻占18.2％，成虫于7月上旬开始羽化，8月上旬达到羽化高峰，此期的成虫数量达61.3％，而蝗蝻仅占38.7％，蝗蝻期约为72d，成虫寿命54d左右，每雌平均产卵32.6粒。鼓翅皱膝蝗在草地上属聚集分布，蝗蝻发生期种群的空间动态主要表现出扩散趋势，但初孵化出土时有短暂的聚集行为。取食量随龄期增大而增大，每头鼓翅皱膝蝗取食牧草量蝗蝻期平均为1.5g，成早期约为5.8g，成早期的食量是蝗蝻期的3.7倍。表3参12

ECOLOGICAL CHARACTERISTICS OF THE LOCUST,ANGARACRIS BARADENSIS (PALLAS)

The population structure and seasonal changes in number,spatial pattern and dynamics of Angaracris baradensis(Pallas) were studied in Ganjia High Mountain Grassland in Xiahe County, Gansu. The results showed that the locust species had only one generation in a year, and their eggs wintered in the soil and began to hatch in the second ten days of May each year, with the hatching peak period taking place in the first ten days of June. The early hatched nymphs became adults in the first ten days of July and started laying in the last ten days of July or the first ten days of August. The development of the nymphs underwent for about 72 days and the longevity of the adults lasted for about 54 days with 32.6 eggs laid per female. The spatial pattern belonged to aggregated distribution pattern. The daily food intake was 1.5 g at nymph stage and 5.8 g at adult stage. Tab 3, Ref 12