| 张 璐, 刘奇志, 张国珍*.6种梨果实对轮纹病的抗性差异及4种杀菌剂对轮纹病菌的抑菌作用[J].植物保护,2019,45(4):224-228. |
| 6种梨果实对轮纹病的抗性差异及4种杀菌剂对轮纹病菌的抑菌作用 |
| Resistance of six pear variety’s fruits to ring rot and inhibitioneffects of four fungicides to Botryosphaeria dothidea |
| 投稿时间：2018-08-23 修订日期：2018-11-07 |
| DOI：DOI: 10.16688/j.zwbh.2018368 |
| 中文关键词: 梨轮纹病 品种抗性 杀菌剂 |
| 英文关键词:pear ring rot variety resistance fungicide |
| 基金项目:国家梨产业技术体系(CARS-28-18) |
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| 中文摘要: |
| 由葡萄座腔菌Botryosphaeria dothidea引起的梨轮纹病是梨生产中重要的真菌性病害, 主要造成树势早衰和果实腐烂, 严重影响梨的产量和品质。本研究选取市售的6个品种的梨果实, 用分离自梨枝干的轮纹病菌进行了离体果实接种, 测定不同品种果实对梨轮纹病的抗性差异。接种后6 d, 按照病斑直径从大到小的顺序, 品种排序依次为‘丰水梨’>‘南果梨’>‘库尔勒香梨’>‘皇冠梨’>‘雪花梨’>‘砀山酥梨’, 随病斑减小抗性依次增强。测定了4种杀菌剂对梨轮纹病菌菌丝生长的抑制作用, 结果表明, 咯菌腈、氟啶胺和咪鲜胺对梨轮纹病菌的菌丝生长有很强的抑制作用, EC50分别为0.010 3、0.022 4 μg/mL和0.034 3 μg/mL; 代森锰锌的EC50为3.860 7 μg/mL, 也有较好的抑菌效果。本试验结果为了解不同梨品种对轮纹病的抗性及杀菌剂的选用提供了依据, 具有一定的指导意义。 |
| 英文摘要: |
| Pear ring rot caused by Botryosphaeria dothidea is an important fungal disease in pear production, which mainly causes premature aging of the tree and fruit decay and seriously affects the yield and quality of pears. In this study, the fruits of six pear varieties sold in the market were inoculated in vitro with the pathogen B.dothidea isolated from pear branches to determine the resistance of different varieties to pear ring rot. The order of lesion size from large to small at six days post inoculation was ‘Hosui’ pear>‘Nanguo’ pear>‘Korla’ pear>‘Huangguan’ pear>‘Xuehuali’ pear>‘Dangshan Suli’ pear, and the resistance increased with the decrease of lesion size. The inhibitory effect of four fungicides on the mycelial growth of B.dothidea was determined. Fludioxonil, fluazinam and prochloraz had a very strong inhibition with the EC50 values of 0.010 3, 0.022 4 μg/mL and 0.034 3 g/mL, respectively. The EC50 value of mancozeb was 3.860 7 μg/mL, owning a better inhibition effect as well. The results of this study provide a basis for the knowledge of different pear varieties resistance to ring rot and the fungicide selection and have guiding significance for the production. |
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