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Bryobia mite activity expected to decline

Bryobia mites prefer warmer weather; their populations typically decline naturally over winter.  

An adult Bryobia mite (Source: cesar).


The dry, mild conditions experienced in much of Victoria and southern NSW during autumn have been optimal for Bryobia mite (Bryobia spp.) activity. Long, white feeding trails characteristic of Bryobia mite feeding damage have been observed in canola, vetch, and barley in the Victorian Mallee and the NSW Central West Slopes and Plains.

The observed damage has been accompanied by sighting of these tiny mites (~0.75 mm). Bryobia mites can be recognised by their flat, ‘pie-shaped’ bodies, which can vary between dark grey, orange and olive in colour, and their 8 red-orange legs, of which the front two are distinctively long.

There are no economic thresholds to guide growers in deciding when chemical control of Bryobia mites is warranted.

If seedlings are infested with low populations, keep in mind that numbers should naturally decline with the arrival of cooler temperatures, and therefore may not require spraying.

If infestations are overwhelming seedlings, especially water-stressed crops, ensure you have identified the mite correctly before spraying. This is particularly important because recommended chemicals (and rates) used against other mites might be ineffective against Bryobia mites.

Are you seeking further information on this pest? Visit our comprehensive Bryobia mite PestNote.


Field reports of Bryobia mites

Rohan Brill – NSW DPI (Riverina, NSW)

Neil Durning –  Riverina Independent Agronomy (Riverina, NSW)

Craig Muir – AGRIvision (Mallee, NSW)

Warwick Nightingale – Delta Agribusiness (Riverina, NSW)

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