Pest of the week – Mealy Cabbage Aphid

The Mealy cabbage aphid (Brevicoryne brassicae) is an aphid pest of brassicas. Due to the mild winter and the recent weather conditons, colonies of mealy aphid have been building in crops of oilseed rape. The aphid causes the flower buds to purple and distort, potentially leading to aborted pods and a reduced yield.

If the treatment threshold of 1 in 8 plants is reached, a pirimicarb based insecticide would provide control when applied at  a maximum rate of 420g/ha in 300 litres of water.

Mealy aphid in OSR

Mealy aphid in OSR

Mealy aphid infection

Mealy aphid infection

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