Cultural and Biological Control Measures Against Corm Rot Disease of Tannia (Xanthosoma sagittifolium (L.) Schott): Impact on Growth and Yield

Authors

  • Mangaleswary Thavabalachandran Horticultural Crops Research and Development Institute, Gannoruwa, Peradeniya, Sri Lanka
  • Rajapakse R.G.A.S. Horticultural Crops Research and Development Institute, Gannoruwa, Peradeniya, Sri Lanka

Keywords:

Tannia, Trichoderma microbial pesticide, Leaf yellowing (corm rot) disease, Productivity

Abstract

Tannia (Xanthosoma sagittifolium (L.) Schott), a backyard tuber crop and a low subsistence staple  food, is now an important commercial crop in Sri Lanka. It is a shade loving crop relatively free from  pest problems. However, corm rot (leaf yellowing) disease caused by Rhizoctonia spp. is one of the  major constraints in the profitable cultivation of the crop. At present this disease has reached anepidemic level in most of the tannia cultivated areas. The main symptoms of the disease are yellowing  of leaves, stunted plant growth and rotting of tubers. Experiments were conducted at Horticultural  Crops Research and Development Institute (HORDI), Gannoruwa for three consecutive seasons (2006-2009) for the management of soil borne disease, corm rot (leaf yellowing) in tannia. Four cultural  practices (planting on ridges, pits, flat land and intercropping with maize) and three soil treatments  with Trichoderma (at the time of planting, one and two months after planting) were evaluated. The  disease incidence was very low in soils treated with Trichoderma based biocontrol agent. The resultsrevealed that soil treatment with Trichoderma gave significantly higher yields (13.5 t ha-1) and mean  number of cormels per plant and mean cormel weight. Therefore, Trichoderma based biocontrol agent  was found to be effective for the management of soil borne diseases like corm rot and getting higher  productivity.  

Author Biography

Mangaleswary Thavabalachandran, Horticultural Crops Research and Development Institute, Gannoruwa, Peradeniya, Sri Lanka

Reserch Officer,Root and Tuber Crops Division

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Published

2015-01-01

How to Cite

Thavabalachandran, M., & R.G.A.S., R. (2015). Cultural and Biological Control Measures Against Corm Rot Disease of Tannia (Xanthosoma sagittifolium (L.) Schott): Impact on Growth and Yield. JOURNAL OF ROOT CROPS, 39(2), 178–182. Retrieved from https://journal.isrc.in/index.php/jrc/article/view/112

Issue

Vol. 39 No. 2 (2013): Journal of Root Crops

Section

Research Articles

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