Crop monitoring from July onwards is key to making effective decisions for controlling diamondback moth.

Key Points

• Diamondback moth (DBM) can be a serious pest of canola and is found in all grain-growing regions.
• DBM outbreaks have become more frequent and severe in some regions, particularly in seasons with mild winters.
• The key to DBM control is to monitor crops from mid-July onwards.
• Resistance to commonly used insecticides is a major concern.
• Use thresholds to guide spray decisions and rotate insecticide groups between years.
• High-risk situations may require two sprays applied within seven days to control DBM.
• Spray application withholding periods before harvest or windrowing are the same, and must be observed.

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Region West, South

• 515.03 kbDiamondback Moth Fact Sheet: Southern and Western regions (Low resolution version) Diamondback moth is a sporadic but serious canola challenge. Crop monitoring from July onwards is key to making effective decisions for controlling diamondback moth.
• 2.46 mbDiamondback Moth Fact Sheet: Southern and Western regions (High resolution version)Diamondback moth is a sporadic but serious canola challenge. Crop monitoring from July onwards is key to making effective decisions for controlling diamondback moth.