Can Diatomaceous Earth (DE) dust be applied in sheds using leaf blowers and achieve adequate surface coverage? This trial found that with fine-tuned application techniques, coverage extended to all areas within the shed, meeting the intended objective.
Research from the GRDC Grain Storage Extension team has revealed a safer and more effective way to apply diatomaceous earth (DE) in empty on-farm silos. DE, a flour-like dust made from fossilised aquatic organisms, works as a non-chemical control by dehydrating insects through abrasions to their waxy coating.
Evaluating Application Methods for Diatomaceous Earth in Grain Storages
Originally published as Development Activity 2024-3 | Project Code: PRB2011-001SAX
Diatomaceous Earth (DE) is an important structural treatment used to control storage pests in empty silos. This development activity compared dry application methods for distributing DE in both cone-bottom and flat-bottom silos, aiming to identify approaches that achieve the most uniform coverage across all silo surfaces.
Key Findings:
The 18v battery blower and petrol-powered leaf blower, used with a venturi attachment, provided more uniform distribution of DE than the benchmark compressed-air BloVac gun.
In the flat-bottom silo, ground-level application via access door resulted in consistent DE coverage at all levels – offering a safe and effective method.
Venturi-assisted delivery created a finer, more stable dust cloud, improving reach to upper silo sections.
Longer application time increased air circulation and dust suspension, enhancing coverage.
Recommendations:
Use battery or petrol-powered blowers with a homemade venturi (ideally a “Y” fitting with a half-diameter suction pipe) for optimal distribution.
Apply DE from ground level while moving the blower nozzle regularly to target all areas.
Maintain dust circulation during and after application to reach higher wall areas.
Future Work:
Further trials should refine blower application techniques and explore the use of DE in grain sheds.
Download the full report: Diatomaceous Earth Application – DA 2024-3 (PDF)
Diatomaceous earth (DE) is a proven solution for pest control in grain storage, but its effectiveness depends on uniform application. Recent research highlights that battery-powered and petrol-powered blowers with venturi attachments deliver superior distribution compared to traditional compressed-air methods.
Protecting your harvest from insect threats requires diligent control and precise fumigation practices. In GRDC’s article, Insect Control and Effective Fumigation Help Guard Your Harvest, the focus is on strategies to enhance biosecurity and preserve grain quality. Key points include:
Fumigation Best Practices: Effective fumigation techniques are critical for eliminating pests while safeguarding the crop.
Biosecurity Measures: A strong biosecurity approach helps prevent insect infestations before they become a threat.
Integrated Pest Management: Using a combination of methods, including proper storage and sanitation, can minimize pest risks.
Stay informed on the best methods to protect your harvest and ensure grain quality
Explore innovative pest management strategies focused on cleanliness and proactive practices in GRDC’s latest article, A Clean Approach to Pest Management. This approach highlights how effective sanitation and hygiene practices can reduce pest infestations, helping to maintain crop health and yield. Learn more about practical steps for pest prevention and control in this comprehensive guide.
Pre-harvest grain storage health check – Chris Warrick, Primary Business.
With harvest looming this livestream will address timely factors that will impact your grain storage outcomes. Preventing issues is always better than dealing with them and the loss they cause. Topics will include high impact hygiene, this year’s protectant choices and application, retrofitting and utilising aeration cooling.
Condensation drains can be left open majority of the time, closed only during fumigation. Thanks to the GRDC’s grain storage specialist Chris Warrick. More info visit http://storedgrain.com.au call 1800WEEVIL.
Tip for helping seals last longer on silos. Thanks to the GRDC’s grain storage specialist Chris Warrick. More grain storage info available http://storedgrain.com.au or call 1800 WEEVIL.
Tip for sealing silos for fumigation that have a clamp style outlet seal. Thanks to the GRDC’s grain storage specialist Chris Warrick.