任晶晶, 刘政源, 王勇, 冯俊涛, 何军, 吴华, 马志卿. 草莓根腐病防控生物药剂筛选与田间防治效果验证[J]. 农药学学报, 2022, 24(6): 1456-1465. DOI: 10.16801/j.issn.1008-7303.2022.0048
    引用本文: 任晶晶, 刘政源, 王勇, 冯俊涛, 何军, 吴华, 马志卿. 草莓根腐病防控生物药剂筛选与田间防治效果验证[J]. 农药学学报, 2022, 24(6): 1456-1465. DOI: 10.16801/j.issn.1008-7303.2022.0048
    REN Jingjing, LIU Zhengyuan, WANG Yong, FENG Juntao, HE Jun, WU Hua, MA Zhiqing. Indoor screening of biofungicides for strawberry root rot and verification of field control efficacy[J]. Chinese Journal of Pesticide Science, 2022, 24(6): 1456-1465. DOI: 10.16801/j.issn.1008-7303.2022.0048
    Citation: REN Jingjing, LIU Zhengyuan, WANG Yong, FENG Juntao, HE Jun, WU Hua, MA Zhiqing. Indoor screening of biofungicides for strawberry root rot and verification of field control efficacy[J]. Chinese Journal of Pesticide Science, 2022, 24(6): 1456-1465. DOI: 10.16801/j.issn.1008-7303.2022.0048

    草莓根腐病防控生物药剂筛选与田间防治效果验证

    Indoor screening of biofungicides for strawberry root rot and verification of field control efficacy

    • 摘要: 草莓根腐病是陕西关中地区草莓生产中的主要病害之一。采用组织分离法对引起草莓根腐病的病原菌进行分离,通过形态学和分子生物学的方法鉴定其为茄腐镰刀菌Fusarium solani和尖孢镰刀菌Fusarium oxysporum。采用菌丝生长速率法测定了4种植物源农药对上述两种镰刀菌的抑菌活性。结果表明,1.5%苦参 • 蛇床子素水剂(AS)对尖孢镰刀菌的抑菌活性最强,EC50值为2.7 µg/mL,0.3%苦参碱乳油(EC)对茄腐镰刀菌的抑菌活性最强,EC50值为4.5 µg/mL。选择室内抑菌活性较高的3种植物源杀菌剂和3种微生物菌剂 (枯草芽孢杆菌、多粘类芽孢杆菌和哈茨木霉菌) 为供试药剂进行田间试验,发现1000亿芽孢/g枯草芽孢杆菌可湿性粉剂(WP) 600倍液对草莓根腐病的防治效果最好,达69.25%,10亿芽孢/g多粘类芽孢杆菌 WP 800倍液、1.5%苦参 • 蛇床子素 AS 700倍液、2亿芽孢/g哈茨木霉菌 WP 200倍液防治效果分别为63.14%、62.84%和59.74%。因此推荐使用枯草芽孢杆菌 WP、多粘类芽孢杆菌 WP、苦参 • 蛇床子素 AS 和哈茨木霉菌 WP 作为草莓根腐病的田间防治药剂。

       

      Abstract: Strawberry root rot is one of the main diseases of strawberry in Guanzhong, Shaanxi Province. In this report, the pathogen strains of strawberry root rot were isolated through tissue isolation method. And they were identified as Fusarium solani and Fusarium oxysporum through morphological and molecular biological methods. The inhibitory activity of four plant derived fungicides against two Fusarium species was determined by mycelial growth rate test. Matrine + osthol 1.5% AS had the strongest inhibitory activity to F. oxysporum with EC50 value of 2.7 µg/mL, while matrine 0.3% EC had the strongest inhibitory activity to F. solani with EC50 value of 4.5 µg/mL. Three plant derived fungicides and three microbial fungicides (Bacillus subtilis, Bacillus polymyxa and Trichoderma harzianum) were selected for field test against strawberry root rot. The 600 times dilution of B. subtilis 100 billion spores/g WP had the best control efficacy against strawberry root rot, up to 69.25%. The control efficacy of 800 times dilution of B. polymyxa 1 billion spores/g WP, 700 times dilution of matrine + osthol 1.5% AS and 200 times dilution of T. harzianum 200 million spores/g WP were 63.14%, 62.84% and 59.74%, respectively. Therefore, B. subtilis WP, B. polymyxa WP, matrine + osthol AS and T. harzianum WP are recommended as field control agents for strawberry root rot.

       

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