烯效唑抑制小麦黑胚病及促进黑胚粒发芽作用的研究

The effects of uniconazol on inhibition of wheat black embryo disease and germination rate and emergenee of the black embryo grains

摘要: 试验结果表明，烯效唑对小麦黑胚病菌有强烈的抑制作用，低浓度(5～15mg／kg)烯效唑可抑制黑胚病对黑胚粒发芽、出苗的影响，促进黑胚粒的发芽和出苗；高浓度(20mg／kg)烯效唑则抑制黑胚粒发芽和出苗；用10～15mg/kg烯效唑浸种可预防和防治小麦黑胚病发生，而且幼苗生长旺盛，根系发达。目前河北省推广的小麦品种黑胚率为11．1%，严重者高达42．8%。链格孢菌(Atternaria tenuis)是导致小麦黑胚病发生的主要病原菌，占病原分离物的91．4%。

Abstract: Currently 91．4% of the black embryo grains in commercial cultivated wheat varieties are caused by Alternaria tenuis．The infection rate of black embryo disease for most commercial wheat varieties is about 11.1%，with a few seriously affected up to 42．8%．Lower concentration uniconazol(5～15mg／kg)can increase germination rate and emergence of the black embryo grains，and improve the seedling growth.while higher concentration uniconazol (20mg／kg)，on the contrary，inhibit the germination and emergence．Seed soaking with 15mg／kg uniconazol can also prevent the black embryo disease．