细绿萍在我省常见的病虫害有霉腐病、萍蚜虫及萍螟,还有青苔也危害萍体生长发育.霉腐病多发生在高温季节.为预防此病发生,应保持水质清洁,及时分萍,不拖氮素肥料,培育健壮萍体.当发现病害发生时,轻则应迅速分萍,捞除病株或轮换萍田;重则喷洒800～1,000倍多菌灵或托布津等农药.每亩萍面喷100斤药液. Fine green Lupin in our province common pests mildew, Ping aphids and Ping borer, and moss also endanger the growth and development of Pingtong. Mold rot occurs in the hot season .In order to prevent the occurrence of the disease, should maintain clean water, Timely points Ping, not to delay the nitrogen fertilizer, nurturing robust body .When found disease occurs, ranging from rapid sub-Ping, fishing for diseased strains or rotation Ping-field; heavy spraying 800 to 1,000 times the carbendazim or Topaz Pesticides and other pesticides per acre Pingpen spray 100 pounds liquid.