桉树枝瘿姬小蜂成虫雄性比例观察

Observation on the male ratio of Leptocybe invasa adult

通过对窿缘桉Eucalyptus exserta和巨园桉E.grandis×E.tereticornisDH201-2上1 200头桉树枝瘿姬小蜂Leptocybe invasaFisher&La Salle连续2个月的观察,发现桉树枝瘿姬小蜂成虫雄性比例达到18%～48%,比报道的0.5%～0.8%(即雄雌性比1/195～1/124)高17.2%～47.2%,其比例在不同桉树品种和不同时间差异极显著。

Observation on 1 200 adults of Leptocybe invasa Fisher La Salle from Eucalyptus exserta and E.grandis×E.tereticornis DH201-2 was made for two months.The result showed the ratio of male adults was between 18% and 48%,17.2%-47.2% higher than the reported 0.5%-0.8% which meant the sex ratio of male to female was 1 to 195-1 to 124.And the male ratios in different species of eucalyptus and time were significantly different.