Efficacy of Fungicides and Spatial Distribution of Angular Leaf Spot on Tripterygium wilfordii Infected by Pseudocercospra elaeodendri
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摘要: 用8种真菌杀菌剂防治雷公藤角斑病, 室内孢子毒力试验表明:孢子萌发抑制效果以75%百菌清可湿性粉剂最好, EC50=0.49mg·L-1, EC=0.78mg·L-1, 其次是25%腐霉利可湿性粉剂, 80%代森锰锌可湿性粉剂。浓度70mg·L-1嘧霉胺及100mg·L-1的异菌脲、甲基硫菌灵、三唑酮对分生孢子萌发的抑制率均小于10%。通过聚集度指标法的测定、Iwao的回归分析法和Taylor的幂法则对雷公藤角斑病的空间分布格局进行研究, 结果表明, 雷公藤角斑病病株在林间为均匀分布。Abstract: Efficacy of 8fungicides was examined in vitro on the germination of Pseudocercospra elaeodendri.The best effect of the fungicides was the 75% mass fraction chlorothalonil WP with EC50=0.49mg·L-2, EC=0.78mg·L-2, followed by the 25% mass fraction procymidone thiram WP, and then, the 80% mass fraction mancozeb WP.Spore germination inhibition rates of<10% were found for pyrimethanil (70 mg·L-2) , iprodione (100mg·L-1) , thiophanate-metlyl (100mg·L-1) and tradimefon (100mg·L-1) after 7hincubation.Based on the aggregation indices, Iwao′s regression and Taylor′s power law, the spatial distribution pattern of the angular leaf spot of Tripterygium wilfordii was found to be uniform in the area′s forests.
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Key words:
- Tripterygium wilfordii /
- Pseudocercospra elaeodendri /
- fungicide /
- toxic efficacy /
- infection process
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[1] 周光伟, 沈权, 金若珏, 等.雷公藤多甙对类风湿关节炎患者滑膜细胞凋亡的影响[J].浙江临床医学, 2007, 9 (8) :1034-1035. [2] 李雪芹, 高明, 黄斐斐.雷公藤多甙治疗糖尿病肾病的临床研究[J].中国实用医药, 2009, 4 (18) :178-179. [3] 杜华蓉, 张照明.窄谱UVB联合雷公藤多甙片治疗玫瑰糠疹的疗效观察[J].西部医学, 2012, 24 (8) :1601-1602. [4] 周小慧, 王平, 陈延伟, 等.雷公藤提取液对卫矛尺蠖取食和生长的影响[J].湖南农业科学, 2004, (2) :43-45. [5] 李键, 陈灿, 林晗, 等.人工栽培雷公藤醇提取物对杉木种子发芽的化感效应[J].西南林学院学报, 2008, 28 (5) :31-34. [6] 李键, 陈灿, 洪滔, 等.人工栽培雷公藤水浸提液对白菜种子发芽的化感效应[J].北华大学学报:自然科学版, 2008, 9 (5) :457-560. [7] 李键, 洪伟, 吴承祯, 等.雷公藤水浸提液对杉木生长的影响[J].福建林学院学报, 2008, 28 (2) :121-124. [8] 陈红梅.雷公藤角斑病病原鉴定及其生物学特性[J].福建林学院学报, 2008, 28 (3) :240-246. [9] 谢婉凤, 郭文硕, 陈玉森, 等.雷公藤角斑病菌的生物学特性及侵入途径观察[J].福建农林大学学报:自然科学版, 2011, 40 (1) :13-18. [10] 谢婉凤, 郭文硕, 冯丽贞, 等.福木假尾孢菌Pseudocercospora elaeodendri的转录间隔区序列分析[J].福建林学院学报, 2010, 30 (4) :293-296. [11] 郑俊仙, 梁光红, 郑郁善.雷公藤叶部病虫害的发生现状、成因及对策[J].亚热带农业研究, 2012, 8 (1) :31-36. [12] 黄秀萍, 郭文硕, 陈全助, 等.雷公藤角斑病菌产毒条件研究[J].福建林学院学报, 2012, 32 (4) :350-354. [13] 黄秀萍, 郭文硕, 冯丽贞, 等.雷公藤角斑病菌毒素对寄主防御酶活性的影响[J]福建农林大学学报:自然科学版, 2013, 42 (1) :47-50. [14] 江建国, 陈京元, 蔡三三, 等.10种杀菌剂对大叶黄杨坏损尾孢菌的毒力测定[J].中国森林病虫, 2008, 27 (2) :36-38.
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