Blowfly Watch

The Blowfly watch predicts the emergence of blowflies based on Met Office Data. This can help to predict risk of clinical cases and help treatment timings.

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25 March 2026 Update from Professor Richard Wall

After a relatively cold start to the year, the recent warm weather in southern England and Wales means that the first sheep blowflies have now emerged and early strikes may start to be seen - appropriate management procedures and prophylaxis should therefore be in place. Early shearing should be considered as it helps to protect ewes from strike while the fleece is short. In northern England and southern Scotland, the strike risk remains low but risk will increase quickly as the weather warms through May; preparations for strike management should therefore be in hand.

Blowfly resources

Blowfly Watch

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