Growers and advisers are urged to go beyond a visual inspection of crops to determine the exact cause of ill-thrift in a crop. \n\nResearch that followed the devastating impact of beet western yellows virus in 2014 canola crops in South Australia has thrown up some anomalies causing scientists to urge more precision when it comes to diagnosing potential crop disease. \n\nContact: \nPiotr Trebicki \npiotr.trebicki@agriculture.vic.gov.au\nLearn more about your ad choices. Visit megaphone.fm/adchoices