2016-17 Prepared by S.R. Fricker, & C.R. Williams Healthy Environments, Healthy People Research Group Sansom Research Institute School of Pharmacy & Medical Sciences The University of South Australia GPO Box 2471 Adelaide SA 5000 A survey of mosquitoes along the Murray River in South Australia. A REPORT PREPARED FOR Renmark Paringa Council, Berri Barmera Council, The District Council of Loxton Waikerie, The Mid-Murray Council, The Rural City of Murray Bridge, The Coorong District Council and Alexandrina Council. Mosquito surveillance along the River Murray in South Australia was conducted from late August 2016 to April 2017. Overall, a total of 59, 777 (n=353) adult female mosquitoes were collected from 35 regular monitoring sites. The mosquito populations along the River Murray all exhibited a distinct early spring cohort, consisting of predominantly the early season mosquito Ae. camptorhynchus in the south, and a mixture of Cx. australicus, An. annulipes, Ae. camptorhynchus and Cx. annulirostris in the more northerly monitoring points. A survey of mosquitoes along the Murray River in South Australia 2016-17. A REPORT PREPARED FOR Renmark Paringa Council, Berri Barmera Council, The District Council of Loxton Waikerie, The Mid-Murray Council, The Rural City of Murray Bridge, The Coorong District Council and Alexandrina Council. Prepared by S.R. Fricker, & C.R. Williams Healthy Environments, Healthy People Research Group Sansom Research Institute School of Pharmacy & Medical Sciences Frount page picture of Mundic Creek Rd December 2016 CONTENTS CONTENTS ................................................................................................................................................................ 0 1. SUMMARY. ............................................................................................................................................................... 4 Mosquito-borne disease. .................................................................................................................... 5 2. INTRODUCTION. ................................................................................................................................................. 7 3. METHODS. .............................................................................................................................................................. 9 Adult trap location and monitoring procedures. ................................................................................ 9 Larval site locations and monitoring procedures. ............................................................................. 11 Weather Data. ................................................................................................................................... 11 River Flow Data. ................................................................................................................................ 12 Arbovirus infection notification data. ............................................................................................... 13 Arbovirus detection project-passive traps/FTA cards. ...................................................................... 13 4. GENERAL RESULTS AND INFORMATION FOR ALL COUNCILS. ................................................15 Arbovirus infection data 2016-2017. ................................................................................................ 15 Arbovirus detection project-passive traps/FTA cards. ...................................................................... 20 River Levels. ....................................................................................................................................... 21 5. RESULTS FOR THE RENMARK PARINGA COUNCIL. ........................................................................24 Adult trap site descriptions. .............................................................................................................. 24 Weather Data: Renmark Paringa Council. ......................................................................................... 27 Adult mosquito trapping results: Renmark Paringa Council. ............................................................ 31 Mosquito Larval Dipping and Treatment: Renmark Paringa Council. ............................................... 35 Discussion of Renmark Paringa results. ............................................................................................ 39 COMMENTS. ...................................................................................................................................... 45 LOCAL RECOMMENDATIONS. ............................................................................................................ 47 6. RESULTS FOR THE BERRI BARMERA COUNCIL. ................................................................................48 Adult trap site descriptions. .............................................................................................................. 48 Weather Data: Berri Barmera Council. .............................................................................................. 51 Adult mosquito trapping results: Berri Barmera Council. ................................................................. 53 Mosquito Larval Dipping and Treatment: Berri Barmera Council ..................................................... 57 Discussion of Berri Barmera results. ................................................................................................. 60 COMMENTS. ...................................................................................................................................... 65 CONTENTS LOCAL RECOMMENDATIONS. ............................................................................................................ 67 7. RESULTS FOR THE DISTRICT COUNCIL OF LOXTON WAIKERIE. ............................................68 Adult trap site Descriptions. .............................................................................................................. 68 Weather Data: The District Council of Loxton Waikerie. .................................................................. 71 Adult mosquito trapping results: The District Council of Loxton Waikerie. ...................................... 75 Mosquito Larval Dipping and Treatment: Loxton Waikerie Council. ................................................ 79 Discussion of Loxton Waikerie Results. ............................................................................................. 81 COMMENTS. ...................................................................................................................................... 85 LOCAL RECOMMENDATIONS. ............................................................................................................ 87 8. RESULTS FOR THE MID-MURRAY COUNCIL. .......................................................................................88 Adult trap site descriptions. .............................................................................................................. 88 Weather Data: Mid-Murray Council. ................................................................................................. 91 Adult mosquito trapping results: Mid-Murray Council. .................................................................... 94 Mosquito Larval Dipping and Treatment: Mid-Murray Council. ....................................................... 98 Discussion of Mid-Murray Results. .................................................................................................. 100 COMMENTS. .................................................................................................................................... 104 LOCAL RECOMMENDATIONS. .......................................................................................................... 106 9. RESULTS FOR THE RURAL CITY OF MURRAY BRIDGE. ............................................................... 107 Adult trap site descriptions. ............................................................................................................ 107 Weather Data: The Rural City of Murray Bridge. ............................................................................ 110 Adult mosquito trapping results: The Rural City of Murray Bridge. ................................................ 114 Mosquito Larval Dipping and Treatment: The Rural City of Murray Bridge. .................................. 118 Discussion of Murray Bridge Results. .............................................................................................. 121 COMMENTS. .................................................................................................................................... 125 LOCAL RECOMMENDATIONS. .......................................................................................................... 127 10. RESULTS FOR THE COORONG DISTRICT COUNCIL. .................................................................. 128 Adult trap site descriptions. ............................................................................................................ 128 Weather Data: The Coorong District Council. ................................................................................. 131 Adult mosquito trapping results: The Coorong District Council. .................................................... 135 Mosquito Larval Dipping and Treatment: The Coorong District Council. ......................................