玉米丝黑穗病[Sphacelotheca reliaina(Kuehn)clint]是一种以土壤传染为主的系统侵染性病害。一年侵染一次。据研究,病菌从种子萌芽到七叶期都能侵染,侵染时期长达五十余天,过去用甲基托布津、多菌灵、萎锈灵等杀菌剂防治,效果低而不稳,近年来我区推广用甲基托布津防治一般仅有40～60％的效果。因此,筛选残效期长,高效低毒,内吸性强的新农药,是防治玉米丝黑穗病急待解决的问题。 Corn head smut [Sphacelotheca reliaina (Kuehn) clint] is a systemic infestation of soil-borne diseases. Infested once a year. According to the study, the germs from the seed germination to the seven-leaf stage can be infected, the infection period of up to 50 days, the past with thiophanate-methyl, carbendazim, atrophy and other fungicides control, low and unstable effect In recent years, our district to promote the use of thiophanate-methyl prevention and control generally only 40 to 60% of the results. Therefore, the selection of new pesticides with long residual period, high efficiency and low toxicity and strong systemic absorption is an urgent problem to be solved in the control of smut.