کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5769277 | 1628773 | 2017 | 7 صفحه PDF | دانلود رایگان |
- Persistence of B. amyloliquefaciens CPA-8-formulated products on nectarines and peaches.
- Response of B. amyloliquefaciens CPA-8 to unfavorable environmental conditions.
- Wide tolerance of B. amyloliquefaciens CPA-8 to temperature, relative humidity and simulated rainfall.
- Promising strategy to obtain high treatment efficacy under field conditions and during storage.
The biocontrol agent Bacillus amyloliquefaciens CPA-8 has been suggested as an effective alternative to chemical applications against brown rot caused by Monilinia spp. This study aimed to describe the population dynamics of CPA-8 on the surface of nectarines and peaches after being exposed to unfavourable environmental conditions. Two CPA-8-formulated products were obtained by fluid-bed spray-drying and then applied on fruit. Although both products included 20% sucrose plus 10% skimmed milk as protecting agents, they differ in the carrier material used during the formulation process: maltodextrin (CPA-8-formulated product called BA3) or potato starch (CPA-8-formulated product called BA4). CPA-8 has demonstrated wide tolerance to different factors such as, temperature, relative humidity and simulated rainfall. The minimal antagonist population obtained after exposure was generally higher than 104 CFU cmâ2 of fruit surface, which ensures high treatment coverture and therefore, efficacy. The results also indicated that peaches were, in general, more suitable for the CPA-8 survival than nectarines. Moreover, the properties of the two CPA-8-formulated products influenced the population dynamics of the bacterium, suggesting that the BA4 CPA-8-formulated product provided higher degree of ecological fitness of CPA-8 over the fruit than the BA3 CPA-8-formulated product. The data obtained in this work led us to conclude that the integration of these CPA-8-formulated products into cropping systems is a promising strategy to achieve higher levels of brown rot control and hence contribute to a successful handling of postharvest diseases in stone fruit.
Journal: Scientia Horticulturae - Volume 225, 18 November 2017, Pages 359-365