摘要
恩施州大面积应用２５％甲霜灵ＷＰ防治马铃薯晚疫病已有四、五年历史，因病菌产生抗药性，防效日降。经３年研究，防病增产作用与甲霜灵相当的是５８％甲霜灵锰锌ＷＰ、７０％乙磷铝锰锌ＷＰ、８０％大生Ｍ－４５ＷＰ、７２％克露Ｍ－８ＷＰ和６４％杀毒矾Ｍ－８ＷＰ５种，防效达８４．２９％～９７．８１％；其中药剂成本低于甲霜灵又不易产生抗药性的只有甲霜灵锰锌、乙磷铝锰锌和大生３种。建议在甲霜灵已减效或失效的病区，大力推广甲霜灵锰锌和乙磷铝锰锌，交替或搭配应用大生、克露等其它新农药。
Twenty five percent Metalaxyl W P has been broadly used in controlling potato late blight in Enshi Autonomous Prefecture for four to five years.Because of the increase of resistance of Phytophthora infestans to the chemical,its protection efficiency is reducing gradu ally. Through three year research,we found out that 58% Metalaxyl Mn·Zn W P , 70% Aliette Mn·Zn W P , 80%Dithane M 45W P , 72%Curzate M8W P ,and64% Sandofan-M 8 W.P. have the equal efficiency to 25%Metalaxyl W P in controlling the disease and increasing production(yield),which control the disease up to 84 29～97 81%.Among them, 58% Metalaxyl Mn·Zn W P , 70% Aliete Mn·Zn W P , and 80% Dithane M 45W P have lower cost and do not stimulate chemical resistance of Phytophthora infestans. The research suggested that 58% Metalaxy Mn·Zn W P and 70% Aliette Mn·Zn W P should be broadly used to replace Metalaxyl where the protection efficiency of Metalaxy has reduced or lost,and 80% Dithane M 45W P and 72% Curzate M8W P should also be used alternatively.
出处
《马铃薯杂志》
1998年第1期7-10,共4页
Chinese Potato Journal
基金
恩施州科委资助
