| 田耀加, 赵守光, 张 晶, 黄亮华, 王秋燕, 陈红弟.鲜食玉米南方锈病发生动态及药剂防控[J].植物保护,2016,42(6):177-180. |
| 鲜食玉米南方锈病发生动态及药剂防控 |
| Occurence dynamics and chemical control of southern rust on fresh corn |
| 投稿时间：2015-12-22 修订日期：2016-02-01 |
| DOI： |
| 中文关键词: 鲜食玉米 南方锈病 发生动态 危害 药剂防治 |
| 英文关键词:fresh corn southern rust occurrence dynamics damage chemical control |
| 基金项目:广东省科技计划项目（2013A061401019）; 广州市2015年财政农业项目 |
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| 中文摘要: |
| 田间条件下采用目测法调查了由多堆柄锈菌(Puccinia polysora Underw.)引起的南方锈病在广州鲜食玉米产区的发生动态, 并测试了锈病对鲜食玉米产量的影响及几种药剂对南方锈病的防治效果。结果表明, 南方锈病在鲜食玉米生产期间持续危害, 7月份和11月份发生最严重, 发病率近100%。锈病危害直接造成鲜食玉米果穗净重降低, 重度危害(危害严重度>50%)比轻度危害(危害严重度<30%)折合每667 m2产量减少47.6 kg。化学药剂对南方锈病具有抑制作用, 其中125 g/L氟环唑SC和250 g/L吡唑醚菌酯EC的防治效果最好, 处理后锈病危害严重度比对照分别降低63.04%和57.21%, 可挽回产量损失8%以上。 |
| 英文摘要: |
| The occurrence dynamics of southern rust (Puccinia polysora Underw.) was investigated with the method of visual observation under field condition at producing area of fresh corn in Guangzhou. The damage of rust against corn yield and the control effect of several fungicides were also tested. Results showed that the rust damages fresh corn during the whole growing period of corns all the year round, and the most serious period appeared in July and November with disease incidence of nearly 100%. The net weight of corn ear reduced with the damage of southern rust. Thus, the yield of fresh corn decreased by 47.6 kg per 667 m2 when the disease severity was higher than 50%. 125 g/L epoxiconazole SC and 250 g/L pyraclostrobin EC both had the good control effect, and the disease severity was decreased by 63.04% and 57.21% respectively compared with the control, and reduced the yield loss by more than 8%. |
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