Control of sugarcane white leaf disease using planting date in the western part of Thailand | การทดสอบฤดูปลูกเพื่อหลีกเลี่ยงโรคใบขาวในเขตภาคตะวันตก
2012
Sunee Srisink | Wanlipa Suchato
White leaf is the most important disease of sugarcane in Thailand. To control the disease, the recommendations are to use clean seed and roguing the infected plants. Choosing planting date is one of the practical measures. The experiment was conducted in farmer’s field in Ratchaburi province where white leaf disease iscommonly found. Split plot with 4 replications was used as experimental design. Main plots consisted of 3 planting dates; 17th January, 19th March and 2rd August 2007. Subplots consisted of three sugarcane varieties; K88-92, Suphanburi80 and U-thong8. The plant crop was harvested at 12 months old (except for the August planted cut at 10 months old due to lodging). The incidence of white leaf in both plant crop and ratoon crop were recorded and infected plants were destroyed. The results showed that, sugarcane planted in January and March showed low disease, only 1.47 and 0.38% white leaf found respectively whereas 9.38% white leaf found in sugarcane planted in August. The same results were obtained in the first ratoon crop. When the canes were cut in May (August), there was more than 28% disease plantsfound. Sugarcane varieties K88-92 and Suphanburi 80 were more susceptible to white leaf disease than Uthong 8.
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