Testing of Cassava Varieties on Integrated Root Rot Disease Management in Farmer’s Field at, Arunya Pratet District, Sa Kaeo Province

Abstract

The experiment was conducted in farmer’s field at Tupprik sub-district, Arunya Pratet district, Sa Kaeo province during October 2015 to February 2016. The objective was to determine cassava varieties which properly respond to integrated root rot disease management for reducing root rot disease damage. The experiment was planned using randomized complete block design with 4 replications. Four cassava varieties, namely Rayong 5, Rayong 72, Rayong 9 and Huaybong 60 were used for this study. All experimental plots were arranged by integrating agricultural practices. It consisted of destroying hard pan by a tractor with two shafts, high bedding in the same way of slope, and spacing in 1.2x0.8 m. Cassava cutting was soaked with metalaxil 20-50 g/ water 20 L. All infected plants were pulled out and destroyed. Soil around 1 m in radius of diseased plant was scattered with lime. Data records were growth, yield, yield components, and diseased plant (from 3 months after planting to harvesting). The results revealed that the best response variety to integrated root rot disease management was Rayong 9 due mainly to it showed lower disease infection and higher yield.