| 赵建华1#, 王宏民2#, 张天浩1, 张仙红1*.玫烟色棒束孢耐热菌株的筛选及对麦长管蚜的致病力测定[J].植物保护,2019,45(1):234-237. |
| 玫烟色棒束孢耐热菌株的筛选及对麦长管蚜的致病力测定 |
| Screening of thermo-tolerable Isaria fumosorosea strains andvirulence evaluation to Sitobion avenae |
| 投稿时间：2018-01-28 修订日期：2018-03-11 |
| DOI：S 435.122 |
| 中文关键词: 玫烟色棒束孢 耐热菌株 麦长管蚜 致病力测定 |
| 英文关键词:Isaria fumosorosea thermo-tolerable strains Sitobion avenae virulence evaluation |
| 基金项目:山西省自然科学基金(201801D121253) |
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| 中文摘要: |
| 采用48℃恒温水浴热胁迫法对玫烟色棒束孢7个菌株进行了耐热性测定。结果表明, 热胁迫45 min后, 不同菌株的残存活孢率差异显著, 其中IF-502、IF-904和IF-9606菌株耐热性较强, 残存活孢率均达50%以上; IF-7606菌株耐热性最差, 残存活孢率仅为28.70%; IF-14、IF-511和IF-609菌株耐热性居中, 残存活孢率34.72%~36.00%。对耐热性强的IF-502、IF-904和IF-9606三个菌株对麦长管蚜若蚜的致病力测定表明, IF-904菌株在1×107孢子/mL时对麦长管蚜的致病力最高, 校正死亡率达88.20%, 致死中时最短, 为2.67 d。 |
| 英文摘要: |
| Thermotolerance of seven Isaria fumosorosea strains were determined by exposing thermal stress at 48℃ for 45 min. The results showed that residue viabilities differed significantly among seven strains tested, three strains including IF-502, IF-904, IF-9606 were high thermotolerance due to their residue viabilities more than 50%, but one strain (IF-7606) was weak in thermotolerance due to its residue viabilities of 28.70%. The residue viabilities of the rest strains fell in a range of 34.72%-36.00% and their thermo-tolerance were thus intermediate. In addition, virulence evaluation of high thermo-tolerant strains including IF-502, IF-904 and IF-9606 showed that the IF-904 strain was the highest virulent strain to Sitobion avenae with the corrected mortality of 88.20% and the shortest LT50 was 2.67 days. |
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