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Native budworm update

Recent moth trap catches reveal that native budworm moths continue to arrive in cropping regions of south-eastern Australia.

Pheromone trap results show that native budworm moths continue to arrive in major cropping regions (table 1). In past years, we have used peak catches of moth activity to inform a predictive model to estimate when eggs laid during major moth flights will hatch and reach the 3rd larval instar stage – the most damaging stage for crops. This has proven tricky this year as there have been no clear peaks in activity.

While the continued migration of moths and egg laying through spring is probable, earlier crop maturation in drier areas could mean that some pulse and canola crops will not be as attractive to budworm moths as a site of egg lay.

In any case, monitoring of pulse and canola crops regularly using sweep nets from early podding onwards is recommended. It is important to sample representative parts of the entire paddock prior before making a control decision. Taking multiples of 10 sweeps within at least five locations in a paddock is recommended.

For more information on monitoring including economic thresholds, visit our comprehensive PestNote.

 

Table 1. Number of native budworm moths caught in pheromone traps. **Indicates use of Trapview automated pest monitoring system.

 

Weekly moth counts from the native budworm trapping program in south-east Australia for the week ending 2nd October. X = weekly data has not been collected from trap (Source: MothTrapVis, National Pest Information Service).

 

 

Many thanks to the coordinators and counters participating in our moth trap program, including:

Brad Bennett, AGRIvision (Mallee VIC)

Neilson Carr (Central VIC)

Jim Cronin, Landmark (Central West Slopes & Plains NSW)

Adam Dellwo, Elders (Riverina NSW)

David Bufton (South West VIC)

Rob Fox, AGRIvision (Wimmera VIC)

Bill Gardner (Wimmera VIC)

Sarah Groat, Ag Grow Agronomy and Research (Riverina NSW)

Barry Haskins, Ag Grow Agronomy and Research (Riverina NSW)

Shayn Healey, Crop-Rite (Mallee VIC)

George Hepburn, Tylers Hardware and Rural Supplies (Wimmera VIC)

Damian Jones, Irrigated Cropping Council (Mallee VIC)

Annieka Paridaen, Premier Ag Consultancy Group (South West VIC)

Andrew Rice, ASPIRE agri (Central West Slopes & Plains NSW)

Max Ridley, Landmark (Central West Slopes & Plains NSW)

David White, Delta Agribusiness (Riverina NSW)

Rachel Whitworth, Ag Grow Agronomy and Research (Riverina NSW)

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