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The Timerite® date is approaching for many localities and should be enacted if redlegged earth mite populations warrant it
About Timerite®
Redlegged earth mites (Halotydeus destructor - RLEM) were prevalent in many regions earlier in the year. Early-mid spring is the ideal time to consider potential issues for 2017. Excellent control of RLEM can be achieved if they are sprayed during a short window in spring when female mites have ceased laying winter eggs (eggs that must hatch this season) and before they start laying diapause eggs (over-summering eggs that survive until next season). This approach, known as Timerite®, can significantly reduce RLEM numbers the following autumn.
The optimum spring-spray dates for RLEM in eastern Australia are mostly between mid-September and mid-October. Location-specific dates are freely available from the Timerite® website.
Some examples of the recommended dates are:
Horsham - 23rd Sept
Bendigo - 28th Sept
Wagga Wagga - 29th Sept
Dubbo - 14th Oct
Colac - 16th Oct
The date is based on geographical location and is therefore unique to each property. It is recommended that spraying be carried out within the two-week period before the optimal date.
Correct identification of mites before deciding to spray is important. The Timerite® strategy is designed to only control RLEM; it will not effectively control other pests, such as blue oat mites and lucerne flea (and it can exacerbate lucerne flea issues). Before using this approach, consideration should also be given to the number of mites present and the susceptibility of the crop to be sown next season. Insecticides need to be used judiciously to avoid resistance issues, which have already emerged in RLEM in Western Australia.
Free RLEM resistance testing
Take advantage of a testing service to screen for resistance in mites, available to all growers and advisors thanks to GRDC. For more information see PestFacts Issue No. 7 or contact:
Dr James Maino
cesar
Ph: 03 9349 4723
Email: jmaino@cesaraustralia.com
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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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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