Amblyseius andersoni is an important generalist predatory mite that act as biological control agents in fruit orchards and vineyards. It is one of the main natural enemies of spider mites and small insects in fruit crops and grapevine. The conservation of its population is a key aspect of integrated pest management in these crops, and the use of non-selective insecticides poses a severe risk for its persistence. Ensuring compatibility between pesticides and predators is a crucial challenge in agriculture, especially from the perspective of integrated pest management. In this research, we studied the dose-response effect of deltamethrin and spinosad on some strains of A. andersoni. Three commercial strains reared in three different biological control companies and a field strain taken from an organically managed orchard in Veneto were used. The impact of these insecticides on phytoseids survival and fecundity was evaluated. Based on field doses, this study shows that some strains were resistant to both products, while one strain remained susceptible. In conclusion, the study shows that A. andersoni, due to the resistance found, can be used in integrated pest management in combination of tested insecticides.
Effetti letali e sub-letali di spinosad e deltametrina nei confronti dell’acaro predatore Amblyseius andersoni
RIPAMONTI, LETIZIA
2023/2024
Abstract
Amblyseius andersoni is an important generalist predatory mite that act as biological control agents in fruit orchards and vineyards. It is one of the main natural enemies of spider mites and small insects in fruit crops and grapevine. The conservation of its population is a key aspect of integrated pest management in these crops, and the use of non-selective insecticides poses a severe risk for its persistence. Ensuring compatibility between pesticides and predators is a crucial challenge in agriculture, especially from the perspective of integrated pest management. In this research, we studied the dose-response effect of deltamethrin and spinosad on some strains of A. andersoni. Three commercial strains reared in three different biological control companies and a field strain taken from an organically managed orchard in Veneto were used. The impact of these insecticides on phytoseids survival and fecundity was evaluated. Based on field doses, this study shows that some strains were resistant to both products, while one strain remained susceptible. In conclusion, the study shows that A. andersoni, due to the resistance found, can be used in integrated pest management in combination of tested insecticides.File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/77887