黔糖3号黄斑(点)病大田防控药剂试验

Effects of different pestcides on controlling Mycovellosiella koepkei(kruger) Deighton of fruit sugarcane in field

黄斑（点）病是黔糖3号果蔗生产上的主要病害。通过多种农药对黄斑（点）病田间防控试验研究，结果表明，实施农药的综合防控率达65．88％，较对照（不施农药）高57．72百分点，防效明显，而且对1～5级病害都有减轻作用；在不同农药6种处理防效中，77％可杀得300倍液防效最好，防控率达81．48％，较对照高73．32百分点，50％退菌特＋50％多菌灵混合600倍液的防控率79．44％，较对照高71．32百分点，与77％可杀得300倍液防效差异不大，但都较其他各处理防效高5百分点以上，差异显著，而且两者1、2、3级病害率都比对照分别降低于20％、15％、10％，且能有效控制4级、5级严重病害发生。因此，针对黄斑（点）病害防控农药选择，建议采用77％可杀得或50％退菌特＋50％多菌灵，适时施用，可有效控制该病害发生、蔓延和危害。

Mycovellosiella koepkei（Kruger） Deighton was a main disease in production of Qiantang 3 （ a fruit sugarcane variety）. Six different pesticides were tested to study the effect on controlling Mycovellosiella koepkei（Kruger） Deighton. The results showed that the controlling rate of spraying 77 % Cocide was up to 81.48 % ,73.32 % higher than that of CK and the controlling rate of spraying 50 % Carbendazim ＋ 50 % Tuzet was 79.44 % ,71.32 % higher than that of CK. The control rate of spraying 77 % Cocide or 50 % Carbeudazim ＋ 50 % Tuzet was above 5 % higher than that of other 4 pesticides. The disease rate of Ⅰ,Ⅱ and Ⅲ level of spraying 77 % Cocide or 50 % Carbendazim ＋ 50 % Tuzet was 20 %, 15 % and 10 % lower than that of CK respectively and spraying 77 % Cocide or 50 % Carbendazlm ＋ 50 % Tuzet could effectively control Ⅳ and V disease level. Therefore,77 % Cocide or 50 % Carbendazim ＋ 50 % Tuzet method should be used in production of Qiantang 3.