Nine years of mating disruption to control grape moth at Yvorne | Neuf ans de lutte par confusion contre les vers de la grappe a Yvorne
2006
Charmillot, P.J. | Paquier, D. (Agroscope Changins-Waedenswil (ACW), Nyon (Switzerland))
The mating disruption technique to control grape berry moth Eupoecilia ambiguella and grape vine moth Lobesia botrana, was applied by means of RAK1+2, Bocep Viti, RAK1+2R, or Isonet-LE dispensers, from 1997 until 2005 on the 165 ha vineyard of Yvorne. Many difficulties appeared during the first years, due to a high initial population, a late installation of the dispensers, a too short duration of pheromone emission, an insufficient density of dispensers per ha or a change of the pests dominance related to climatic conditions. Complementary insecticidal treatments in first or second generation proved to be necessary on a more or less large surface according to the seasons. Eventually, in 2004 and 2005, any recourse to insecticides could be avoided and the populations of pest broke down. During these nine years, the level of damage, which strongly fluctuated, was always lower at Yvorne than in the vineyard of Aigle nearby, under classical control with insecticides.
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