| 球孢白僵菌与玫烟色棒束孢制剂对柑橘木虱的防治 |
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| 引用本文： | 代晓彦,李翌菡,沈祖乐,许炜明,吴建辉,任顺祥,邱宝利.球孢白僵菌与玫烟色棒束孢制剂对柑橘木虱的防治[J].华南农业大学学报,2017,38(1):63-68. |
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| 作者姓名： | 代晓彦 李翌菡 沈祖乐 许炜明 吴建辉 任顺祥 邱宝利 |
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| 作者单位： | 1. 华南农业大学 农学院/广东省生物农药创制与应用重点实验室/广东省农业害虫生物防治工程技术研究中心广东 广州510642; 山东省农业科学院 植物保护研究所，山东 济南250100;2. 华南农业大学 农学院/广东省生物农药创制与应用重点实验室/广东省农业害虫生物防治工程技术研究中心广东 广州510642 |
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| 基金项目： | 广东省科技计划 ( 2015A020209140); 广州市科技计划（201509010023）; 广州市产学研协同创新重大专项对外合作项目(201604030029); 广东省普通高校省级重大科研项目(2014-16) |
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| 摘 要： | 【目的】研究2株高致病力菌株球孢白僵菌Beauveria bassiana和玫烟色棒束孢Isaria fumosorosea菌株对柑橘木虱Diaphorina citri不同虫态的致病力及田间防控效果。【方法】球孢白僵菌和玫烟色棒束孢孢子稀释成1×104、1×105、1×106、1×107、1×108mL~(-1),室内喷施法研究其对木虱低龄、高龄若虫与成虫的侵染致死效果;在笼罩条件下研究其在半田间条件下对柑橘木虱成虫种群的控制作用。【结果】2种真菌制剂对柑橘木虱低龄若虫的致病力高于高龄若虫。7 d后球孢白僵菌和玫烟色棒束孢对柑橘木虱高龄若虫的LC50值分别为3.6×104和5.2×104mL~(-1),对低龄若虫的LC50值分别为3.5×104和4.2×104mL~(-1),而对柑橘木虱成虫的LC50值分别为1.4×105和1.6×105mL~(-1)。在半田间条件下,球孢白僵菌和玫烟色棒束孢对柑橘木虱成虫的LC50值分别为3.7×105和1.2×106mL~(-1)。同一孢子浓度对柑橘木虱的致死率室内效果优于半田间。2种真菌制剂对柑橘木虱成虫的致死时间与孢子浓度有关,LT50随着真菌孢子悬浮液浓度的增加而递减,球孢白僵菌孢子浓度为1×105~1×108mL~(-1)时,柑橘木虱成虫的LT50值为5.2~4.4 d;玫烟色棒束孢孢子浓度为1×106~1×108mL~(-1)时,柑橘木虱成虫的LT50值为5.3~4.9 d。【结论】球孢白僵菌和玫烟色棒束孢菌株对柑橘木虱有良好的生物防治效果,柑橘木虱各虫态的死亡率与病原真菌的孢子浓度正相关。
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| 关 键 词： | 柑橘木虱 球孢白僵菌 玫烟色棒束孢 致病力 生物防治 |
| 收稿时间： | 2016/3/15 0:00:00 |
The biocontrol effects of Beauveria bassiana and Isaria fumosorosea on Asian citrus psyllid |
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| DAI Xiaoyan,LI Yihan,SHEN Zule,XU Weiming,WU Jianhui,REN Shunxiang and QIU Baoli.The biocontrol effects of Beauveria bassiana and Isaria fumosorosea on Asian citrus psyllid[J].Journal of South China Agricultural University,2017,38(1):63-68. |
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| Authors: | DAI Xiaoyan LI Yihan SHEN Zule XU Weiming WU Jianhui REN Shunxiang and QIU Baoli |
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| Abstract: | Objective] To study pathogenicity and biological control effects of two entomopathogenic fungi Beauveria bassiana and Isaria fumosorosea to the nymphs and adults of Asian citrus psyllid ( ACP ) Diaphorina citri. Method] The spore suspensions of B. bassiana and I. fumosorosea were diluted to 1 × 104 , 1 × 105 , 1 × 106 , 1 × 107 and 1 × 108 mL-1 , and then were sprayed on ACP younger instar, older instar nymphs and adults indoor to study the lethal effects and under semi-field conditions to study the control effects against ACP adult population. Result] B. bassiana and I. fumosorosea had higher pathogenicity to younger nymphs ( 2 -3 instar ) than to older nymphs ( 4 -5 instar ) . After seven days infection, the LC50 of B. bassiana and I. fumosorosea to ACP older nymphs were 3. 6 × 104 and 5. 2 × 104 mL-1 , to ACP younger nymphs were 3. 5 × 104 and 4. 2 × 104 mL-1 , and to ACP adults were 1. 4 × 105 and 1. 6 × 105 mL-1 respectively. Under semi-field conditions, the LC50 of B. bassiana and I. fumosorosea to ACP adults increased to 3. 7 × 105 and 1. 2 × 106 mL-1 . The lethal effects of two fungi at the same spore concentration against ACP in semi-field were lower than those indoor. Meanwhile, the lethal time of both fungi to ACP adults was correlated with spore concentration. The LT50 decreased with the increase of spore concentration, ranged between 5. 2-4. 4 days when the spore concentration of B. bassiana varied from 1 × 105 to 1 × 108 mL-1 , and ranged between 5. 3 -4. 9 days when the spore concentration of I. fumosorosea varied from 1 × 106 to 1 × 108 mL-1 . Conclusion] Both B. bassiana and I. fumosorosea have good biocontrol effects against ACP. The fatality rates of ACP are positively correlated with the concentrations of fungal spores. |
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| Keywords: | Asian citrus psyllid Beauveria bassiana Isaria fumosorosea pathogenicity biological control |
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