First cabbage root flies captured

We put out yellow water traps and sticky traps (for carrot fly) on 11th March and have been catching a few bean seed flies in the water traps since then. We had caught 2 male and 1 female cabbage root fly in the water traps (3 traps) when they were emptied on 25th March. Cabbage root fly and carrot fly activity is predicted to be relatively early (particularly when compared with 2013) but there is still some time to go before egg-laying starts. Once they have emerged, female cabbage root flies require a bit of time to feed, mate and mature their eggs. This is equivalent to about 80 day-degrees above 6°C. No carrot flies have been captured yet.

Further details can be found in the HDC Pest Bulletin.

Rosemary Collier : 28 Mar 2014 17:20 |  Comments (0) |  Report a problem