The cherry fly or rhagoletis cerasi is a species of typhoptera. It is one of the main pests of cherry trees in Europe.
Morphology of the cherry fly
- Egg. They are spindle-shaped and whitish and small (0.7×0.2 millimeters).
- Larva. Apex, whitish in color, after three larval stages they reach between 4 and 6 millimeters.
- Pupa. The pupa is protected by a cylindrical pupae, four millimeters, formed by the exuvia of the last larval state.
- Adult. Glossy black with a brown head. It measures between 3.5 and 5 millimeters long.
Biological cycle of the cherry fly
Adults appear between late April and mid-June. They are nourished by the sugary secretions produced by the cherry tree itself and that of aphids.
After 10 to 15 days of mating, with a minimum temperature of 18 ° C, females lay between 50 and 80 eggs on the cherries, a single egg for each cherry, which begin to change color.
After between 6 and 12 days the eggs hatch and the larvae feed on the cherry and at 25 days the larvae are buried in the ground where they will spend all winter in a diapause state.
Treatment against cherry fly
For the fight against cherry fly there are different methods, these are some:
We will first use chromotropic traps to determine if there is presence of this diptera.
The soil can be tilled in March or April to remove most of the wintering larvae.
You can also put a net on the trees to protect them from the fly.
In the chemical fight you have to take advantage before they lay the eggs and are used:
In biological control are used:
- Natural pyrethrins. It is a biological insecticide extracted from the fruits and flowers of the pelitre.
- Rotenone. It is a biological insecticide extracted from the roots of various plants of the Fabaceae family, including those of the genus Derris.
- Azadirachtin. It is a chemical compound belonging to the limonoid group. It is a secondary metabolite present in neem seeds.
- Bacillus thuringiensis. It is a microbiological species of the Bacillaceae family.
- Entomopathogenic fungi.
- Entomopathogenic nematodes.
A pheromone has also been marketed for this diptera for the strategy of capture and evaluation of its population.
Robert Asprin, APD is a non-dieting Accredited Practicing Dietitian passionate about inspiring positive changes in eating and lifestyle behaviors to help improve health while nurturing relationships with food and body.