Online tools for the control of red scale and citrus gall wasp Jianhua Mo NSW Department of Primary Industries

Red scale – the problem

Red scale - lifecycle

Red scale – timing – why? Many chemicals (spray oil, chlorpyrifos, pyriproxyfen (Admiral®), buprofezin (Applaud®) ) target scales at the crawler and whitecap stages Aphytis prefers to parasitize virgin females

Red scale – timing – why?

Red scale – seasonal patterns – adult male Jul Oct Nov Dec Jan Feb Mar Apr May Male flight – Riverina – 2017/2018 * Calendar dates estimated from temperature data in Yanco during 2017/18

Red scale – seasonal patterns – crawlers * Calendar dates estimated from temperature data in Yanco during 2017/18

Red scale – population model

Red scale – Prediction Online prediction tool

CGW – the problem

CGW - lifecycle

CGW – timing – why? Adult wasps are the only visible stage and they are out for 3-4 weeks only in a year Methidathion is most effective against newly hatched larvae

CGW – adult emergence & egg hatch by date (5% - 95%) Male flight – Riverina – 2017/2018 Adult emergence Egg hatch

CGW – adult emergence & egg hatch by degree-days Red dashed lines: 5 – 95%

CGW– Prediction Online prediction tool

CGW– Prediction

THANK YOU Acknowledgements This presentation is based on projects CT15006 and CT15008 funded by Hort Innovation using the citrus research and development levy and funds from the Australian Government. NSW Department of Primary Industries (NSW DPI) provided in-kind support to the projects. THANK YOU