sustainability through science & innovation
Mandalotus weevils (Mandalotus spp.) have been identified for agronomist, Allan Edis (AGnVET Services), from a canola crop near Henty in the Riverina district of New South Wales. This follows recent observations of Mandalotus weevils causing extensive damage to some canola crops in the Victorian Wimmera and Mallee districts, as well as the Mallee area of South Australia. Allan says approximately 3-4 ha of the paddock was completely bared out as a result of the weevil feeding. Mandalotus weevils are also assumed to be responsible for similar damage in a nearby canola crop, however no weevils (or any other pests) could be found upon visual inspection.
Adult Mandalotus weevils are 3-5 mm long and have a rounded, dull brown coloured body, which can easily be mistaken for a small clod of dirt. Adults actively feed during the night, whilst during the day they can be extremely difficult to detect. Feeding damage is usually first noticed on the leaves of emerging crop plants. In severe cases the seedlings may be ‘ring barked’ just above ground level. This causes the plants to fall to the ground where the weevils continue feeding on the leaves.
Click here for images of Mandalotus weevils and refer to PestFacts Issue No. 3 for more information.
What is PestFacts?
PestFacts south-eastern keeps growers and advisers informed about invertebrate pests and beneficials in broadacre crops and pastures during the winter-cropping season in Victoria and southern New South Wales.
PestFacts south-eastern is run through IPMforGrains: Best Practice Insect Pest Management, a project delivered by the National Pest Information Network (cesar, DPIRD, QDAF, NSW DPI, and SARDI). This project aims to provide grain growers and advisors with information on invertebrate grain pest occurrence and equip industry with the knowledge needed to implement integrated pest management practices. This initiative is a GRDC investment and includes in-kind contributions from all project partner organisations.
We need your reports
PestFacts is produced on an ʻas-needsʼ basis and relies upon pest observations and field reports from our subscribers. If you have recently observed invertebrate pests (or beneficial species) in broadacre crops, please contact us to report your observations.
Agricultural invertebrate identification
If you are a grower or agronomist in Victoria or NSW working with broadacre crops or pastures, we can assist you with identifying invertebrates found on farms at no cost. Please contact us for identification help.
PestFacts map
PestFacts map is an interactive tool that allows users to search and view historical pest reports across Victoria and NSW. The map is updated with each issue of PestFacts to include new reports.
How to acknowledge PestFacts?
With appropriate acknowledgement, cesar grants permission to reproduce information taken directly from PestFacts. To cite PestFacts: “PestFacts south-eastern (<<enter date published>>). cesar pty ltd.”
Contact us
0484 310 697
|
PestFacts Reporter app: |
||
 |
 |
|
PestFacts is supported by
