Sensitivity of Alternaria solani to boscalid and control of boscalid resistance with commonly-used fungicides in Shanxi, China

Shi, Xiaojing; Ren, Lixuan; Song, Yingying; Han, Jia‐Run; Liu, H. P.; Zhang, Y. J.

doi:10.1007/s13313-015-0352-9

Cited by 6 publications

(2 citation statements)

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“…3 Fungicides can be applied to manage the disease, but the regular use of chemicals is associated with high costs, health and environmental hazards, and the risk of pathogen populations developing fungicide resistance. 4 Host resistance would be the management strategy of choice, but because of the lack of single-gene resistance and the complex quantitative nature of inheritance of early blight resistance, there are no commercial tomato varieties available that have sufficient levels of resistance against A. solani. 2 Biological control using microbial agents is an environmentally friendly disease alternative management approach that is also compatible with host resistance and cultural control measures.…”

Section: Introductionmentioning

confidence: 99%

“…Rotation with non‐host crops and removal of weeds are not completely effective control measures because the fungus is dispersed between tomato fields via air‐borne spores and can survive in plant debris for long periods of time 3 . Fungicides can be applied to manage the disease, but the regular use of chemicals is associated with high costs, health and environmental hazards, and the risk of pathogen populations developing fungicide resistance 4 . Host resistance would be the management strategy of choice, but because of the lack of single‐gene resistance and the complex quantitative nature of inheritance of early blight resistance, there are no commercial tomato varieties available that have sufficient levels of resistance against A. solani 2…”

Section: Introductionmentioning

confidence: 99%

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Biological control of tomato early blight in Pakistan using local rhizobacteria

Riaz,

Chohan,

Yuen

et al. 2023

Pest Management Science

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BACKGROUNDThe biocontrol potential of soil microbes can reduce the extensive use of hazardous synthetic fungicides. This study was designed to find a strain of rhizobacteria indigenous to Pakistan with potential biocontrol against early blight of tomato caused by Alternaria solani and to characterize its biocontrol mechanisms.RESULTSAmong 88 strains tested for antagonism against A. solani on agar media, S27, Dt10 and 423, identified by 16S rRNA sequencing as strains of Bacillus amyloliquefaciens, B. cereus and Stenotrophomonas rhizophila, respectively, were the most inhibitory. When applied to detached tomato leaflets in Petri dish assays, the strains reduced lesion development by over 30% compared to the control. In greenhouse pot trials, the bacterial strains reduced early blight severity by over 50%. In three field trials, all three strains applied to tomato foliage slowed early blight disease progress and reduced disease severity, with B. amyloliquefaciens S27 reducing the area under the disease progress curve by up to 70%. All three strains showed protease, catalase and oxidase activities in vitro, but none produced β‐1,3‐glucanase and only B. cereus Dt10 showed slight chitinase activity. In a greenhouse experiment in which the bacteria were applied to tomato foliage prior to pathogen inoculation, bacteria‐treated leaves had higher β‐1,3‐glucanase and chitinase levels than leaves inoculated only with the pathogen, indicating priming induction of response.CONCLUSIONThree rhizobacteria strains have the potential to control early blight of tomato under Pakistan's growing conditions, with B. amyloliquefaciens S27 being the most promising candidate for commercial development. Antagonism and induction of the priming response may be mechanisms of biocontrol by the bacterial strains. © 2023 Society of Chemical Industry.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%