EVALUATION OF TRICHODERMA HARZIANUM AND TRICHODERMA VIRENS FOR CONTROL OF PHYTOPHTHRA ERYTHROSEPTICA CAUSING PINK ROT OF POTATO
HR ETEBARIAN1, ES SCOTT2 and T WICKS 3
1Abourayhan Institute of Tehran University, Tehran, Iran; 2Department of Crop Protection, University of Adelaide, Australia; 3South Australian Research and Development Institute, South Australia
Background and objectives
Materials and methods
Glasshouse studies were performed to test the ability of T. virens and Trichodex to control the incidence and severity of pink rot. Potato tuber cultivars of Pontiac and Russeti burbank were surface sterilized and planted in 20 cm plastic pots, one tuber in each pot. The pots contained pasteurized soil infested with P. erythroseptica. Colonized rolled oat with T. virens or Trichodex were incorporated to soil 1 day after pathogen inoculation. Treatments were aranged in a split plot design with 4 replications. Potato cultivars were main plots and Trichoderma treatments were sub-plots. Percentages of inhibition of radial growth which were determined in laboratory and percentage of survival plants 45 days after planting were subjected to an arc sine square root transformation; data on severity and weight of tuber at terminal of experiment were analysed directly. Analysis of variance was performed and means were separated using Duncan's multiple range test.
Results and conclusions
1. Dhingra DD, Sinclair JB, 1995. Basic Plant Pathology Methods. 2nd edition. Lewis publishers, Boca Raton.
2. Dennis C, Webster J, 1971. Transactions of the British Mycological Society 57, 41-48.