Pests in Wheat - In Crop
Constraint - Snails
Snails appear to build up most rapidly in canola, field peas and beans
Snails are a mollusc with a rasping tongue, and one single muscular 'foot' for movement
Much of thier bodies is encased in a shell that they secrete as they grow
Snails consume cotyledons and this may resemble crop failure
Shredded leaves, chewed leaf margins, and irregular holes all occur as a direct result of feeding damage by snails
Snails are predominantly a grain/seed contaminant
1 live snail in a 200 gram sample will lead to rejection
Free living nematodes carrying bacteria that causes snail death are thought to help reduce populations under certain field conditions. Hard grazing of stubbles, cabling and/or rolling of stubbles, stubble burning, cultivation, and removal of summer weeds and volunteers are all effective management options. Molluscidial baits are effective on mature snails, and IPM compatible, but can be less effective on juveniles.
Links and Resources
GRDC - Snail Management Fact Sheet
Key points, avoiding grain rejection, monitoring and control, snail facts, threshold, minimising snail intake, maximising snail and grain separation, post-harvest cleaning, and control options. Published 2012.