Abstract
The effects of the botanical insecticides Biopiren plus, Piresan plus and Neemazal T/S on the predatory mite Amblyseius andersoni (Chant) were tested under laboratory, semi-field, and field conditions. The tests carried out in the laboratory allowed detection of the direct toxicity on eggs and females as well as the effects on fecundity, whereas semi-field trials assessed their residual toxicity. In laboratory and semi-field tests, pyrethrins, particularly Piresan plus, proved to have the highest toxicity with E value, concerning both female mortality and fecundity, of 100 % and 45 %, respectively. The same product tested in the field only caused a significant reduction in the phytoseiid population shortly after the treatment. The relevant escape rate registered in semi-field tests could explain the lack of phytoseiid eradication in the field after treatment with pyrethrins.
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Castagnoli, M., Angeli, G., Liguori, M. et al. Side effects of botanical insecticides on predatory mite Amblyseius andersoni (Chant). Anzeiger für Schädlingskunde/J. Pest Science 75, 122–127 (2002). https://doi.org/10.1046/j.1472-8206.2002.02035.x
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DOI: https://doi.org/10.1046/j.1472-8206.2002.02035.x