Effects of treatment with trichoderma harzianum and some plant activators on post-harvest decay of apple blue mold (Penicillium Expansum link.) and brown rot (Monilinia Fructigena Honey Ex Whetzel)

Abstract

The post-harvest application of Trichoderma harzianum proved to be effective in the control of blue mold and brown rot on apple. The possibilities of separately application of harpin protein (hp) and Lactobacillus acidophilus’s fermentation product (Lafp) and boscalid+pyraclostrobin fungicide were evaluated to the shelf-life of apples. TRIC8 and the plant activators applied to the fruits one hour before pathogens inoculations. The apples were inoculated with a micropipette via the artificially created wounds with the pathogens P. expansum and M. fructigena with suspensions of 1 × 106 conidia/mL-1. After one hour the pathogens inoculations, the fungicide was sprayed onto the fruits at recommended dosage. The apples were stored at (22±2°C) for ten days. TRIC8 was reduced lesion diameter of P. expansum and M. fructigena by 69.73% and 97.13% respectively. Significant results on brown rot was provided by the application of Lafp (100%) but not had same success on blue mold (29.59%). Hp was provided to reduction of lesion diameter on blue mold and brown rot at 29.76% and 41.65%, respectively. The fungicide demonstrated 37.22% and 100% control of blue mold and brown rot on the apples in the shelf-life study, respectively. © 2019, ALÖKI Kft., Budapest, Hungary.