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Carrot fly forecasts

The forecast outputs below are based on weather data collected by Plantsystems Limited and funded by Syngenta. The forecasts predict the timing of fly activity. They do not predict the number of insects present in the crop, as this depends on the size of the local fly population. For control purposes, we consider that the pest has become active when 10% of the insects have emerged/laid eggs and that the peak of activity has occurred when 50% have emerged/laid eggs. The predictions will change over time depending on weather conditions.

Third generation flies are likely to emerge in early to mid-September at the warmest sites.

Updated 29 September 2022

 

Region

First generation

Forecast 50% EGG-LAYING in 2022

Second generation

Forecast 10% EMERGENCE in 2022

Second generation

Forecast 10% EGG-LAYING in 2022 

Second generation

Forecast 50% EGG-LAYING in 2022 

Third generation

Forecast 10% EMERGENCE in 2022

Cornwall (Newquay)

11 May 15 Jul 19 Jul 9 Aug 26 Sep

Kent (Canterbury)

16 May 16 Jul 20 Jul 1 Aug 12 Oct

Suffolk (Woodbridge)

11 May 5 Jul 14 Jul 25 Jul 8 Sep

Wellesbourne (Warwick)

11 May 8 Jul 15 Jul 25 Jul 11 Sep

Norfolk (Norwich)

13 May 15 Jul 22 Jul 1 Aug 15 Sep

South Lincolnshire (Boston)

19 May 16 Jul 25 Jul 8 Aug 13 Oct

Nottingham (Bilsthorpe)

18 May 16 Jul 24 Jul 7 Aug 5 Oct

Lancashire (Ormskirk)

16 May 20 Jul 26 Jul 7 Aug 20 Oct

York (Market Weighton)

20 May 22 Jul 28 Jul 10 Aug 21 Oct

Scotland (Blairgowrie)

28 May 18 Aug 27 Aug 6 Sep -
Carrot fly