BIOLOGICAL CONTROL OF PRE AND POSTHARVEST DISEASES OF TOMATO AND GRAPE FRUITS. | ||||
| Journal of Food and Dairy Sciences | ||||
| Article 2, Volume 25, Issue 10, October 2000, Page 6297-6310 PDF (889.56 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jfds.2000.259664 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. F Hegazi,1; Azza A.M. Shahin2; S. T. Shehata1; Marwa A.M. Atwa2 | ||||
| 1Plant Pathol. Dept., Fac. of Agric., Ain Shams Univ., Cairo, Egypt. | ||||
| 2Microbiol. Dept., National Center for Radiation Research and Technology, Cairo, Egypt. | ||||
| Abstract | ||||
| From seventy five yeast isolates, only eleven were selected as most effective isolates against the main causal fungal rot of tomato fruits, i.e. Alternaria alternata. These isolates which are considered biocontrol strains reduced A. alternata (1 x 106 conidia/ml) infection by more than 90% . Five isolates from those eleven isolates were found to be the most effective ones since they inhibited the infection of the causal organism (1 x 105 and 1 x 106 conidia/ml ) after seven days of incubation at 21 ± 0.5oC. The yeast isolate Ap638 (Arthroacus sp.) completely inhibited the rot infection causd by A. alternata (1 x 105 conidia/ml) when this isolate was used at high concentration (1 x 109 cfu/ml) after 18 days of incubation at 13 ± loC. In the test of different biocontrol agents (40 isolates) against the causal organism of grapes Penicillium crustosum and Botrytis cinerea, one bacterial isolate (Bacillus sp.) and about ten yeast isolates were found to be more effective in reducing the percentage of infection between 50-90%. Pre-and post harvest application of the above mentioned selected isolates were used to control and reduce the percentage of decay, weight loss, shatter, total wastage and frequency of the isolated fungi of Flam and Thompson seedless grapes. | ||||
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