Mites are in canola, cereals and lupins
Andrew Smith (ConsultAg) reports finding mites in a wheat crop near Pingaring which resembled bryobia but are most likely brown wheat mites because bryobia prefer to feed on broadleaved plants and both species look very similar. The seedling leaves had white tips. There were an abundance of mites and the presence of a lot of smaller mites indicated a lot of recent hatchings. The crop was going to be sprayed.
Emma Clarke (DAFWA) has found balaustium mites feeding on the cotyledons of a seedling lupin crop east of Wagin. There was no damage evident.
Laura Archer (Elders) has found balaustium mites (2-3 per plant) on about 50% of plants in a barley crop near Kendenup. Laura also found RLEM causing significant silvering and leaf curling damage in a canola crop north of Kendenup. There were also low numbers (up to three) GPA per plant in about 5% of plants. The crop will be sprayed with an insecticide. Laura also found RLEM and low numbers of GPA in canola at Cranbrook last week.
Growers are reminded that moisture stress in crops may compound mite damage to young crops.
Correctly identifying mites in your crops and pastures is important but can be difficult as some mites look very similar. For tips on how to correctly identify earth mite pests view cesar’s Common earth mites of broadacre crops and pastures in southern Australia YouTube video.
For insecticide information refer to DAFWA’s Autumn Winter Insecticide Guide 2017.
More information on these mites can be found at DAFWA’s;