Biocontrol by plant growth promoting rhizobacteria against black scurf and stem canker disease of potato caused by<i>Rhizoctonia solani</i>

Kumar, Satyendra; Rao, Mudiganti Ram Krishna; Kumar, Rishi; Panwar, Sachin; Prasad, C.S.

doi:10.1080/03235408.2012.745054

Cited by 22 publications

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References 23 publications

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“…Biological controls meet the goals of organic farming (Lynch et al, 2012). Bacterial action by species from the Bacillus genus, primarily Bacillus subtilis, have effectively controlled a common potato disease caused by R. solani in a number of countries for a decade (Kumar et al, 2013;Ben Khedher et al, 2015;Dinu, Boiu-Sicuia & Constantinescu, 2019). In Western Siberia, early-maturing potato cultivars are in high demand due to its short vegetative period.…”

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confidence: 99%

Biological control of important fungal diseases of potato and raspberry by two Bacillus velezensis strains

Асатурова

Штерншис

Tsvetkova

et al. 2021

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Stem canker and black scurf caused by Rhizoctonia solani are the important diseases in potato, while spur blight caused by Didymella applanata is a major disease in red raspberry. In Western Siberia, both crops are grown predominantly in small-scale farming that requires maximal usage of biological products for plant protection instead of chemicals. We evaluated two promising Bacillus velezensis strains BZR 336 g and BZR 517 isolated in the south of Russia (45°1′N, 38°59′E) for their biological control potentials against the potato and red raspberry diseases under the more severe weather conditions of Western Siberia (55°1′N, 82°55′ E). We tested two techniques to apply biocontrol agents: (1) coating the seeds (potato tubers) and (2) spraying over the plants (raspberry canes). In each case, we estimated B. velezensis strains on two plant cultivars differed by the disease resistance. The degree of B. velezensis influence on disease incidence and severity depended on the bacterial strain, the protected plant, and its cultivar. We also demonstrated that two B. velezensis strains significantly stimulated plant growth of potato, which contributed to the plant productivity on both cultivars. The BZR 336 g strain affected the potato productivity more than the BZR 517 strain. Under the influence of both bacterial strains, raspberry yield was significantly higher compared to the control on the susceptible cultivar. These findings indicated that two southern B. velezensis strains had proved their efficacy as biological control agents in the control of the serious fungal infection of potato and raspberry plants under the more severe ecological conditions of Western Siberia. For the first time, we demonstrated B. velezensis strains potential for use as biological control agents against R. solani on potato, and against D. applanata on red raspberry.

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