夏季使用毒气法灭鼠有下面几个有利条件;                                                                                                                                                  ①夏季鼠食性改变，用毒气法灭鼠可以不考虑其适口性：                                                                                                                                    ②夏季，鼠由冬季洞转入夏季洞栖居，夏季洞洞道短，毒气容易进入洞底：                                                                                                                    ③气温较高，毒气易挥发，可提高毒气的灭鼠效果；                                                                                                                                        ④春季干旱草原上使用烟雾剂容易失火，引起草原火灾，夏季较春季不易引起失火，因此毒气法可以直接和毒饵法配合使用。