Identifying crop weevil species is an important step for growers when implementing integrated pest management (IPM) practices.
Weevils, which are commonly found in a wide range of grain crops and can be found in minimum tillage and stubble retention farming systems, feed on vegetative parts of crop plants, often leaving scalloped-shaped holes along the edges of leaves.
The Grains Research and Development Corporation’s The Back Pocket Guide: Crop Weevils has been designed to assist growers identify the most common weevils found in the southern and western cropping regions.
Controlling weevils can be difficult due to their placement within crops and their scattered distribution throughout paddocks.
Growers can monitor their crops and gauge population levels, to help inform them on the best control decision.
Damage from weevils can occur at any time of the growing season, but feeding during the early part of the growing season is typically the most critical.
Seedlings should be continuously monitored from autumn to winter for any major root damage by weevil larvae.
Then in spring growers are advised to look for signs of chewing damage on plants as well as a loss of plant vigour.
To download The Back Pocket Guide: Crop Weevils go to: www.grdc.com.au/GRDC-BPG-CropWeevils
Natalie Lee, Cox Inall Communications
08 9864 2034, 0427 189 827