Bulletin of Insectology (2005) 58, 113-117
Francesco Pavan, Paola Barro, Chiara Floreani, Nadia Gambon, Giorgio Stefanelli and Pierbruno Mutton (2005)
Residual activity of chitin synthesis inhibitors on Lobesia botrana larvae reared in the laboratory on field collected grape berries
Bulletin of Insectology 58 (2), 113-117
Abstract: The residual activity of two chitin synthesis inhibitors (flufenoxuron and lufenuron) was compared to the neurotoxic insecticide (fenitrothion) against Lobesia botrana (Denis and Schiffermüller) larvae. Applications of insecticides against the 1st generation of L. botrana to reduce the 2nd generation were considered unnecessary and contrary to IPM programs. Recently, it has been demonstrated that the use of chitin synthesis inhibitors against the 1st generation, unlike neurotoxic insecticides, reduces the 2nd generation to the same extent as treatments aimed specifically at that generation. To ascertain if this effect was due to the residual activity of these compounds, larvae of L. botrana were reared under laboratory conditions on grape berries treated with insecticides in the field and collected at the beginning of the 2nd generation. Larvae reared on berries treated with chitin synthesis inhibitors against the 1st generation (before or at the end of flowering) or against the 2nd generation (berries pea-sized) showed the same level of mortality, irrespectively whether the berries had been treated 9 or 45 days earlier. In contrast, mortality due to fenitrothion decreased significantly the second week after treatment. Therefore the IGRs residual activity can explain how applications made during the 1st generation can also control European vine moth 2nd generation.
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Database assignments for author(s): Francesco Pavan
Research topic(s) for pests/diseases/weeds:
control - general
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Lobesia botrana |
