Moth caterpillars control in aromatic plants crops | Lutte contre les chenilles noctuelles en cultures de plantes aromatiques
2011
Baroffio, C. A. | Carron, C.-A. | Mittaz, C., Agroscope Changins-Waedenswil (ACW), Conthey (Switzerland). Centre de recherche Conthey | Fischer, S.
The Swiss producers of aromatic plants had to face a massive attack of caterpillars in their crops in 2009. It was caused by a migratory butterfly of the moths family, Heliothis peltigera. This invasion is not expected every year. Regular crop monitoring since the start of May allows to distinguish between a virulent attack of this pest from a local attack of a domestic butterfly. The control method suggested by ACW consists in monitoring one hundred plants once a week as from mid-May (one leaf per plant), then twice a week since the beginning of June. The damage threshold is currently set at 5 % (five plants attacked out of hundred). Above this value, a treatment with the active ingredient spinosad is recommended in aromatic plants organic production.
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