Gene diversity in the striped stemborer population hosted on zi:ania /ati/b/ia was higher than thathosted on oryza sat/va. Genetic distance between different hostpopulations was very small.

• 茭白二化螟群体内遗传多样性高于水稻二化螟群体内的遗传多样性，群体间的遗传距离非常小。