寄生的抗病性的病原菌的毒力在杂交中是势均力敌的.Host resistance and fungal virulence parallel each other in the cross.证实JDS-CPV对我国马尾松毛虫有较好的毒力.The results showed that the JDS - CPV has higher virulence to pine caterpillar.研究了宁虫素对水稻螟虫的毒力及防治效果.Tox...