Methods of protection

Risk quantification
  • Trap the adults with sex traps that attract males to estimate the phase of the insect's cycle. The setting up of the traps must be done at the presumed start of the theft, they must be examined 2 to 3 times a week. They are placed from bud break in the vineyard.
  • Carry out the various counts to assess the populations in times of risk:
    • count the eggs on 50 clusters per plot for the 2nd generation;
    • count the glomeruli on 100 clusters per plot for the first generation;
    • count the outbreaks on 100 clusters per plot or the caterpillars at the end of the season using the brine technique on 25 clusters per plot for the second generation;
  • Consult the plant health bulletin (BSV).
  • Establish mating confusion if possible.
  • Take into account the presence and development of natural parasitoids, such as trichogramma on eggs ( Trichogramma sp.), Certain ichneumons parasitic on caterpillars ( Campoplex capitator ). The same will be the case for natural predators such as Anthocoridae bugs ( Orius sp.) And spiders (Salticidae).
  • Apply insecticides if necessary * ( e-phy ). Two strategies are possible:
    • use an ovicide before depositing the eggs in case of a large population;
    • use an ovicide-larvicide on the young larvae at the time of hatching in case of a lower population.
  • The treatments must be carried out according to the pressure of the pests: it is mainly the summer generation that will be targeted.
Last change : 04/20/21