Smut Disease Reaction of the Promising Sugarcane Clone Series 2017 under Irrigated Condition Smut Disease Reaction of the Promising Sugarcane Clone Series 2017

Abstract

Sugarcane smut disease has been first outbreak and damage to sugarcane cultivation in Thailand was found in 1964 Currently, smut can be found everywhere in sugarcane cultivation, and it is an increasing trend to epidemic. Study on smut disease reaction of the promising sugarcane clones series 2017 was conducted at Suphan Buri Field Crops Research Center. Nine clones of the promising sugarcane clones were planted and compared with LK92-11 (Resistant check), Marcos (Susceptible check) and DOA KK3. They were dipped in spore suspension of Sporisorium scitamineum (Syd.) which is a causal agent of sugarcane smut. After that they were incubated overnight before planting. Incidences of sugarcane smut were counted every month until the canes were 10 months old and harvested at 12 months to evaluate the ratoon reaction. The result showed that, UT17-274, has the least disease incidence of smut at 8.4% (Moderately resistance: MR reaction) in plant cane and 48.1% (Moderately susceptible: MS reaction) in ratoon cane. While LK92-11 showed MS reaction in plant cane and ratoon cane, and DOA KK3 showed MS reaction in plant cane and susceptible (S) in ratoon cane. UT17-274 gives the highest cane yield at 23.9 ton/rai in plant cane and 17.9 to /rai in ratoon cane. The Smut disease reaction of the promising sugarcane clones Series 2017 will be considered before entering the farm trial (FT) for further breeding program.