Pest Management Science (2014) 70, 258-263

Di Peng, Shandong Li, Jianxin Wang, Changjun Chen and Mingguo Zhou (2014)
Integrated biological and chemical control of rice sheath blight by Bacillus subtilis NJ-18 and jinggangmycin
Pest Management Science 70 (2), 258-263
Abstract:
BACKGROUND
Sheath blight caused by Rhizoctonia solani Kühn is a major disease of rice that greatly reduces yield and grain quality and jinggangmycin is the most widely used fungicide to control this disease in China. Bacillus subtilis NJ-18 has broad antimicrobial activity to many phytopathogenic bacteria and fungi; it is especially effective against Rhizoctonia solani. Laboratory, greenhouse and field tests were conducted to determine the effect of combining the biological control agent Bacillus subtilis NJ-18 with the fungicide jinggangmycin for control of rice sheath blight.
RESULTS
Growth of NJ-18 in vitro was not affected by jinggangmycin. In a greenhouse experiment, disease control was greater with a mixture of NJ-18 and jinggangmycin than with either alone; a mixture of NJ-18 at 10⁸ cfu mL⁻¹ and jinggangmycin at 50 or 100 mg L⁻¹ reduced lesion length by 35% and 20%, respectively, and the combinations showed a synergistic action. In three field trials, disease control was significantly greater with a mixture of NJ-18 at 10⁸ cfu mL⁻¹ and jinggangmycin at 75 or 150 g a.i. ha⁻¹ than with either component alone.
CONCLUSION
The results of the study indicate that, when Bacillus subtilis NJ-18 strain was combined with jinggangmycin, there was an increased suppression of rice sheath blight, and thus could provide an alternative disease control option.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Ming-Guo Zhou, Chang-Jun Chen

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
control - general
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Rhizoctonia solani	Rice (Oryza)
Bacillus subtilis (antagonist)	Rhizoctonia solani	Rice (Oryza)