Wet conditions drive spike in snail and slug activity

South Australian growers are being urged to keep a close eye on snail and slug numbers, with this season's wet conditions leading to a noticeable increase in pest activity.

The Department of Primary Industries and Regions says late summer and autumn rain allowed snail and slug populations to survive in greater numbers, while continued winter rainfall has created ideal conditions for feeding and breeding.

University of Adelaide researcher Dr Michael Nash says slug pressure has been particularly high across parts of the South East, where heavy infestations have caused significant damage in some clover crops despite repeated baiting.

He says the increase is likely the result of strong carry-over populations from last spring combined with favourable seasonal conditions.

While many canola crops have now grown beyond their most vulnerable stage, growers are being encouraged to continue monitoring paddocks rather than relying on pest numbers alone when making management decisions.

The department says bait performance should also be checked after rainfall, as wet conditions can reduce bait effectiveness. Growers are also encouraged to record paddocks with persistent infestations, warning the favourable conditions experienced this year could lead to increased snail and slug pressure again next season.