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We have identified armyworms for consultant, Matt McLoughlan (JSA Independent), who has found them causing damage to a wheat crop and a barley crop near Warracknabeal, in the Wimmera district of Victoria. Damage was evident in the barley crop in a patch confined to clay soil, and typical armyworm chewing damage was also present on some wheat plants. Both crops are at the 3-4 leaf stage. Armyworms have also been reported by agronomist, Ben Batters (Elders), from a Barley crop at Charlton, in the Wimmera district of Victoria. Ben says the damage consisted of parts chewed from some leaves, and some plants cut off at ground level.
Armyworms (Family: Noctuidae) have three parallel white stripes running from the ‘collar’ behind the head, along the body to the tail end. They are normally most damaging toward the end of spring when crops are close to harvest. This is because they chew through the last remaining green part of the plant stems (just below the head), causing the heads to fall. However, in some seasons a winter generation occurs which can cause significant damage to young crops. Where warranted, treatment for armyworms should ideally be carried out in the late afternoon or early evening, as many species are nocturnal feeders.
Click here for images of armyworms and refer to PestFacts Issue No. 6 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.”
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