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Etiella moth activity is likely to have commenced in northern parts of the Victorian Mallee this week, and in other regions in the next 7-14 days
Etiella moth (left) and caterpillar on damaged pods (right) (Source: SARDI)
Where have they been reported?
The very occasional Etiella moth has been seen in lentil crops in the Victorian Wimmera but no other reports have been received from Victorian or New South Wales. The threshold has been exceeded in several areas of South Australia.
About Etiella
Etiella, also known as the lucerne seed web moth (Etiella behrii), is a sporadic but serious pest of lentils in southern Australia.
For comprehensive information on Etiella that affect lentil crops, including their occurrence, lifecycle, behaviour and management strategies, go to Lucerne seed web moth, within the new PestNote series.
Predicted moth activity
The Etiella degree-day model predicts peak Etiella moth flight periods based on local temperatures. This can be used as a guide for when to commence monitoring.
As of 5th October 2015, cumulative degree-days based on actual temperatures and the approximate threshold date for Etiella flight activity based on 20 years of average temperature data at some lentil cropping areas were:
The date when the cumulative total of degree-days (dd) first reaches 351 is the date to commence crop monitoring. The dates are only guides and will depend on temperatures over the next few weeks. Moth activity may occur either side of these dates. Refer to PestFacts Issue No. 10 for further details of the Etiella model and how to use it.
Sources of field reports of Etiella
Ben Cordes – Agronomist, Tylers Hardware & Rural Supplies (Victorian Wimmera)
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.
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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.
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