QUEENSLAND canegrowers are being urged not to panic after a debilitating crop disease was discovered in supposedly resistant cane varieties. Sugar cane smut, a fine black powder of fungal spores, kills cane plants and can wipe out entire plantations.
It caused havoc in Western Australia's sugar industry in 1998, and was detected for the first time in Queensland at Childers last year. Since then, smut has spread to other areas of the state, notably in central Queensland and in the Herbert region between Cairns and Townsville.
Sugarcane research company BSES has been behind a drive to replace cane varieties susceptible to smut with resistant varieties in an effort to overcome the disease. BSES moved yesterday to downplay fears the disease could affect the new varieties after it was detected in three fields of resistant crops. Two affected fields were in the Herbert region, and the other was at Bundaberg in the state's southeast.
Biosecurity expert Barry Croft said it was not unusual for the airborne spores to infect resistant crops in those regions heavily affected by the disease. "These (susceptible) varieties are producing vast amounts of smut spores that are putting pressure on resistant and intermediate varieties," Mr Croft said. "The lower levels of disease in resistant varieties should have minimal effect on yield."
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http://www.theaustralian.news.com.au/story/0,25197,23353527-30417,00.html