Eupoecilia ambiguella
Illustration from the Nordisk familjebok
The Monovalent grape ( Eupoecilia ambiguella ) is a butterfly (moth ) from the family of the winder ( Tortricidae ).
- 5.1 Notes and references
Features
The Monovalent grape has a six to seven millimeters long body with a wingspan of 12-14 millimeters. The wings are pale yellow with black brown transverse band.
Dissemination
The Monovalent grape is widely used in Europe. It is also found in China and Japan.
Way of life
Flight time
Flight time per generation takes about two to five weeks with significant altitude point (as opposed to grape crossed ). The flight, mating and oviposition take place mainly in the evenings.
Behavior
The Monovalent grape is less need temperatures than the crossed grape and is also found in the northern wine -growing regions. It forms two generations per year, which are differentiated according to the crawler in Heuwurm and sour worm.
The pupae of the grape berry moth overwinter under the bark of the vine or on other host plants. From the pupae in late April / early May to slip the animals of the first generation.
Harmful effect
The Monovalent grape berry is considered as the sign of the cross as a grape pest in vineyards. The larvae of both winder infest the flowers and grapes and thereby reduce the yield. Infested grapes are also more prone to gray mold (Botrytis cinerea). The grape berry moth is controlled by insecticides, which are often used preventively. Alternatively, the population size is determined by pheromone traps and then fought the attack targeted with poison use. When biological control is placed on the disrupter and various natural enemies.