Pests in Canola
Broad insect pest resources including Apps are outlined in the Agronomists Toolkit. Select below for pest-specific information.
Constraint -True Wireworm
Larvae grow to 15-40 mm, are soft-bodied, creamy yellow-red brown, with a dark wedge-shaped head, and a flattened tail with distinctive serrated edges
Adults are known as "click" beetles, and are dark brown, elongated and 9-13 mm long
Larvae eat the contents of germinating seeds, and underground stems of establishing plants, causing wilting and death
Affected crops may develop bare patches
Damage is usually greatest when crop growth is slow due to cold wet conditions
Affected crops may require re-sowing if the infestation is severe
Wireworms can only be controlled if detected before sowing. Insecticide can be applied to the soil with fertiliser, or seed at sowing. If damage occurs after sowing, no treatment is available, other than re-sowing bare patches with insecticide-treated seed.
Links and Resources
CESAR - Pestfacts True and false wireworms
Information on sightings, and descriptions of true and false wireworms. Published 2012.
DEPI VIC - Wireworms and false wireworms
Importance/introduction, true wireworms, description, biology, damage, sampling, detection, and control. Published 1995, updated 2011.