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Abstract
Leaf blight disease caused by pathogenic fungus Phytophthora infestans is the major disease in potato that can reduce its production up to 100%. The use of biological agent Trichoderma viride as an inducing potato resistance against leaf blight disease has been considered potential method. The purpose of this study was to evaluate the use of biological agent Trichoderma viride in inducing potato plant resistance. The parameters observed were the growth of the potato plant and leaf blight intensity. Experimental research with complete randomized design with 6 treatments was applied. The results showed that the application of Trichoderma viride could reduce the intensity of leaf blight disease and increase the growth of the potato plant. Trichoderma viride application could improve the systemic resistance of potato plants.
Highlights
Potato is an important horticulture commodity that plays an important role in Indonesian economy
The highest intensity of leaf blight disease was found in positive control treatment (P5), which was 90% at 10 wap and the lowest intensity was identified in the treatment of T. viride 2 wap (P1), which was 59% at 10 wap
The symptoms of the leaf blight disease were not appeared in the negative control treatment (P6) because the plant was not infected by P. infestans pathogens
Summary
Potato is an important horticulture commodity that plays an important role in Indonesian economy. One major obstacle in potato cultivation is leaf blight disease/late blight by Phytophthora infestans pathogens that can cause loss to 100% [3,4] Leaf blight disease is very destructive and difficult to control, because P. infestans is a pathogenic fungus with various degree of pathogenicity, as this fungus is heterothallic [5]. To control this pathogenic fungus, biological control needs to be applied. Controlling the leaf blight disease on potato using induced resistance with antagonistic fungus Trichoderma spp. is part of biological control because it utilizes non-pathogenic microorganisms to induce plant resistance
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