Control of postharvest diseases on citrus fruit by preharvest application of the biocontrol agent Pantoea agglomerans CPA-2

摘要: Abstract The objective in the present study was to investigate survival and effectiveness of different biological agent Pantoea agglomerans formulations against Penicillium spp. with preharvest treatments. Results indicated a high sensitivity non-adapted osmotic-adapted P. cells environmental conditions field, resulting treatments which were ineffective In second part this study, dry solar radiation identified as important that seriously affect populations cells. Different formulation strategies tested order improve resistance unfavourable conditions. Osmotic-adapted presence 25 g L−1 NaCl production medium [osmotic-adapted treatment (P25)] or at water activities (aw) 0.98 (P98)] had higher rates than cells, when these sprayed on oranges stored hermetically sealed chambers low RH 43%. Among seven additives tested, 5% Fungicover bacterial suspension improved adherence persistence exposed Therefore, while alone log values 0.5 CFU cm−2, combination population level reached 5 4.2 CFU cm−2, 0 24 h after application. Lyophilised showed greater fresh has demonstrated improvement can provide better performance biocontrol agents under non-conducive for growth survival.