Control Effect of Two Antagonistic Actinomycete Mixed Strains against Tomato Bacterial Wilt Disease

doi:10.16409/j.cnki.2095-039x.2021.04.013

Abstract

Abstract: In order to overcome disadvantages of single antagonistic strain in controlling tomato bacterial wilt, such as unstable antibacterial activity or poor control effect, the affinity and disease control efficacy of two selected antagonistic actinomycetes mixed strains were investigated. The results showed that there was no obvious antagonistic effect between the two strains, and the composite fermentation broth of FX81with FX28 strains resulted in a larger inhibition zone (36 mm) against R. solanacearum growth compared to the single strain FX81 (27 mm) and FX28 (28.8 mm). The control efficacy of the two mixed strains (BOF8128) on tomato bacterial wilt was 82.03% in potted experiment, which was increased by 8.13% (BOF81) and 18.63% (BOF28) respectively. Meanwhile, the growth of tomato aerial part was significantly promoted, and the dry weight increased by 76.58%. Thus, the two actinomycete strains had significant synergistic effect on the control of tomato bacterial wilt, suggesting that they had the potential to be used in the development and application of microbial fertilizer.

Key words: antagonistic actinomycete, combining strain, bacterial wilt disease, biocontrol efficacy

CLC Number:

S476

LAI Baochun, YAO Jingai, DAI Ruiqing, WU Zhenqiang, WANG Jiarui. Control Effect of Two Antagonistic Actinomycete Mixed Strains against Tomato Bacterial Wilt Disease[J]. Chinese Journal of Biological Control, 2021, 37(5): 1035-1040.

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