Environmental stress responses of the Bacillus amyloliquefaciens CPA-8-formulated products on nectarines and peaches

Abstract

Està subjecte a una llicència de Reconeixement-NoComercial-SenseObraDerivada 4.0 de Creative Commons Chapter VI 197 Chapter VI Environmental stress responses of the Bacillus amyloliquefaciens CPA-8-formulated products on nectarines and peaches

Environmental fate and behaviour of the biocontrol agent Bacillus amyloliquefaciens CPA‐8 after preharvest application to stone fruit

“…These important differences in area coverage observed between the biocontrol applications and chemical treatments could be related to the mode of action of each product. While most chemical fungicides are systemic, B. amyloliquefaciens CPA‐8, like other BCAs, needs a high population and viability to effectively colonise the fruit surface . In the case of the WSPs located on the floor, an inverse relationship was observed between the distance to the canopy and the area of coverage, as well as the number of air colonies at different sampling times.…”

Verifying the biocontrol activity of novel film‐forming formulations of Candida sake CPA‐1: resilience in relation to environmental factors, rainfall episodes, and control of Botrytis cinerea on different hosts

“…The higher adherence of potato starch formulation therefore coincides with its lower solubility. In this way, better results were obtained with a formulated product of Bacillus amyloliquefaciens CPA‐8 based on potato starch than with another composed of maltodextrin substances, both of which were applied to nectarines and peaches . Moreover, after 20 mm of rain exposure, the mean population reduction in the three rain intensities for the PS formulation was approximately 0.3 log higher than that obtained in previous studies for the liquid formulations of C. sake CPA‐1 blended with Fungicover® .…”

Enhanced shelf-life of the formulated biocontrol agent Bacillus amyloliquefaciens CPA-8 combining diverse packaging strategies and storage conditions

“…In previous works (Gotor-Vila, et al 2017c), differences in solubility between the two carriers used during formulation were evidenced. Summarizing, maltodextrin (BA3 product) resulted in a much more soluble product since this polysaccharide is typically composed of an amount of reducing sugars between 3-20 % (whereas starch is close to zero) (Shamekh et al, 2002).…”

“…To successfully formulate CPA-8, the endospore form was used (Gotor-Vila et al, 2017d). The inherent stability of these structures enabled them to remain quiescent, and to withstand extreme environmental conditions such as temperature fluctuations and humidity stress (Gotor-Vila et al, 2017c). However, the physical features of the product were drastically altered, losing homogeneity that would become in an even bigger handicap if the product does not have to be expended in a single dose.…”

“…It was measured in terms of turbidity, a qualitative characteristic which is impacted by solids obstructing the transmittance of light through a water sample. As it was demonstrated, products including maltodextrin would have a long-rate spray; however, potato starch enables a better deposition and maintenance of the product in the surface of fruit (Gotor-Vila et al, 2017c).…”