The preference test in laboratory showed that SSB from both rice and Zizania fields mostly prefered to oviposit on Zizania plants, however, the larvae chose to feed on rice plants.

• 室内选择性试验表明，水稻田和茭白田二化螟均喜在高大的茭白植株上产卵，而幼虫则选择嫩绿的水稻。