轮纹异痂蝗生物学特性初步研究

A preliminary study on biological characteristics of Bryodemella tuberculatum dilutum(Stoll.)

研究结果表明：轮纹异痂蝗在通辽1年发生1代，以卵在土中越冬。越冬卵于翌年5月上中旬孵化，蝗蝻共4龄，全蝻期26-32d，6月上、中旬为羽化盛期。7月上、中旬为产卵盛期，卯产在土中深4～6cm处。成虫可活到9月中旬。轮纹异痂蝗喜食菊科和百合科等幼嫩多汁的植物，食量为每头每日食鲜草1．05g，每666．7m^2可损失鲜草10．25-12．75k。

Bryodernella tuberculatum dilutum （Stoll.） had one generation per year in Tongliao Area. They laid eggs in the soil to over-winter. These eggs began to hatch in the first and middle ten days of May in the following year. Locusts had 4 instars and the nymph stage lasted for 26-32 days. Eclosion took place in the first twenty days of June, while oviposition occurred in the first twenty days of July. Their eggs were oviposited about 4-6 cm under the surface of the soil and the adult locusts could survive till the middle of September. Each locust that prefers juicy plant seedlings such as Composite ＆ Liliaceae could eat 1.05 g fresh grasses per day, which means that 10. 25-12. 75 kg fresh grasses per 666.7 m^2 may be lost.