为明确玉米镰孢菌穗腐病发生与品种资源、播期、种植密度的关系,以及TCF颗粒剂和XDS种衣剂对玉米穗腐病的防效,通过人工接种筛选抗病品种资源、研究播期、种植密度对病害发生的影响,比较防治效果,结合田间基点试验筛选对玉米镰孢菌穗腐病防效显著并具有增产效应的种衣剂和颗粒剂。结果表明,32种自交系中有6个抗病自交系,延迟播种玉米镰孢菌穗腐病发生严重,播种密度对病害发生无显著影响；人工接种条件下,扑福化学喷雾、TCF颗粒剂穴施、XDS种衣剂拌种及其TCF颗粒剂、XDS种衣剂处理后增施大喇叭口期扑福化学药剂喷雾等5个处理表现为百粒重增加、秃尖长度降低,TCF颗粒剂穴施处理的防效最高,为48.69%、其他4个处理防效为39.29%-28.83%,XDS种衣剂处理的增产率最高为29.94%,其他4个处理的增产率为27.83-2.61%,表现为TCF颗粒剂处理的防效高,XDS种衣剂处理增产率高,两个处理差异不显著,均表现较好。辽宁沈阳和凤城试验基点对TCF颗粒剂和XDS种衣剂等5个处理的田间防效试验结果显示,扑福化学药剂喷雾的防效最高,分别为30.77%和24.70%,XDS种衣剂和TCF颗粒剂处理后增施扑福化学药剂喷雾的增产率最高,分别为14.05%和35.46%。
英文摘要:
To explicit relationship between the varieties resource, sowing date, plant density and occurrence of maize ear rot, control efficiencies of TCF granules and XDS seed coating agent against corn ear rot, the pot experiments by artificial inoculation with Fusarium verticillioides and F. graminearum were conducted to study effect of varieties resource, sowing date, plant density to corn ear rot, and compare with control efficiencies, and field experiment for obtaining one with significant control effects and yield enhancements. Results showed that 6 of 32 inbred lines were resistant to corn ear rot, corn ear rot developed serious at late sowing date, no obvious at plant density, hundred grain weight increasing and bald grain long decreasing at Pufu TCF granule, XDS seed coating agent, and TCF granule XDS seed coat in addition with Pufu spray treatment. TCF granule was able to achieve 48.69% control efficiency, 39.29%-28.83% at other four treatment.29.94% yield growth could be achieved at XDS seed coating agent, 27.83%-2.61% at other four treatment. Results indicated that TCF treatment achieve optimal control efficiency and XDS seed coating achieve optimal yield growth. Both treatments were no significant difference, both better control efficiency and yield growth to corn ear rot. Results showed control efficiency of spray iprodione and foggo was 30.77% and 24.70% in shenyang and fengcheng experiment station. Yield growth of XDS seed coating and TCF granule were 14.05% and 35.46%.
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