Larvicidal efficacy of different insecticides incorporated in the artificial diet against grape moths. 1. Tests on grapevine moth Lobesia botrana | Efficacite larvicide de differents insecticides incorpores au milieu artificiel d'elevage sur les vers de la grappe. 1. Tests sur eudemis Lobesia botrana
2004
Charmillot, P.J. | Pasquier, D. | Verneau, S.,Agroscope RAC Changins, Station federale de recherches agronomiques, Nyon (Switzerland)
Nine insecticides were incorporated at different concentrations in artificial diet to determine their larvicidal effectiveness on grapevine moth Lobesia botrana from a laboratory strain originally collected in the Lake of Geneva region. A first evaluation was made after 14 days of rearing. Surviving individuals were kept then until adult emergence. Dose-mortality curves have been established. Efficiency varied greatly among the tested insecticides. Seven out of 9 products had a good potential to control grapevine moths as their LC50 values ranged from 0.05 to 1 ppm: methoxyfenozide, flufenoxuron, indoxacarb, tebufenozide, teflubenzuron, spinosad and chlorpyrifos-methyl. Concerning chlorpyrifos-ethyl (Pyrinex), its high LC50 of approximately 60 ppm can be attributed to the microencapsulated formulation that probably does not allow a good diffusion of active ingredients into the diet. Diflubenzuron does not present any interest for controlling grapevine moth.
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