This presentation describes the lead up to the recent beet western yellows virus outbreak in the southern region, the current situation and the situation moving forward. It contains information relating to the symptoms of BWYV in canola, likely yield losses of affected crops and factors that contributed to this year’s outbreak. The presentation also describes the vector, green peach aphid (GPA), it’s transmission efficiency and the effects of various seed dressings and foliar insecticide applications on infection and spread of the virus.
Current advice is to take into consideration current crop infection levels and the proximity of crops to infected crops (including pulses) when deciding to spray. Close monitoring is important to spray aphid populations ahead of flights. Only registered products should be used and all label directions need to be strictly adhered to. Registered foliar insecticides for GPA, identified resistance and implications for control are presented. To decrease the risk of an outbreak in the future, greater attention needs to be paid to green bridge control. Strategies for high risk seasons such as 2014 are outlined as well as research funding from SAGIT and GRDC to gather data on the outbreak.