Summary:
The Large Narcissus Fly (Merodon equestris) is a species of Hoverfly whose larvae feed on Narcissus (daffodils). Large narcissus flies overwinter inside damaged bulbs as fully-grown larvae which move into the soil to form pupae in the spring. This model Large Narcissus Fly Model predicts the timing of adult emergence, egg laying and egg hatching, enabling users to undertake targeted monitoring and/or mitigating actions to reduce the risk of damage to the crop.