The effect of indoxacarb and five other insecticides on Phytoseiulus persimilis (Acari: Phytoseiidae), Amblyseius fallacis (Acari: Phytoseiidae) and nymphs of Orius insidiosus (Hemiptera: Anthocoridae)

Abstract

A laboratory study assessed the contact toxicity of indoxacarb, abamectin, endosulfan, insecticidal soap, S-kinoprene and dimethoate to Amblyseius fallacis (Garman), Phytoseiulus persimilis Athias-Henriot and nymphs of Orius insidiosus (Say). Amblyseius fallacis is a predacious phytoseiid mite and an integral part of integrated pest management (IPM) programmes in North American apple orchards. The other two beneficials are widely used in greenhouses to manage various arthropod pests infesting vegetable and ornamental crops. Indoxacarb is a slow-acting insecticide, so toxicity data were recorded 7 days post-treatment when the data had stabilised. It showed no toxicity to O. insidiosus nymphs or to A. fallacis or P. persimilis adults. The LC50 values for O. insidiosus nymphs and P. persimilis could not be estimated with their associated confidence limits, because the g values were greater than 0.5 and under such circumstances the lethal concentration would lie outside the limits. The LC50 for A. fallacis was 7.6x the label rate. The fecundity of P. persimilis was reduced by 26.7%. The eclosion of treated eggs from both species of beneficial mites was not affected adversely. Among the other pest control products, S-kinoprene and endosulfan affected adversely at least one species of the predators, whereas dimethoate, abamectin and insecticidal soap were very toxic to all three beneficials. Indoxacarb should be evaluated as a pest control product in IPM programmes.

Sublethal effects of abamectin on the biological performance of the predatory mite, Phytoseius plumifer (Acari: Phytoseiidae)

“…Application of sublethal concentrations of abamectin on newly emerged females had an effect on the reproduction of these females and that of their progeny (Tables 2,5,6). Many studies have demonstrated the adverse effect of abamectin on fecundity of phytoseiid predators (Zhang and Sanderson 1990;Ibrahim and Yee 2000;Bostanian and Akalach 2006;Nadimi et al 2009). Sublethal concentration of abamectin also affected on fecundity of D. brevis (Uhler) (Kim et al 2006).…”

“…Abamectin had an adverse impact on reproduction of D. brevis (Kim et al 2006), P. plumifer (Nadimi et al 2009) and N. longispinosus (Ibrahim and Yee 2000). Some studies have examined the sublethal effects of abamectin on phytoseiid mites (Ibrahim and Yee 2000;Bostanian and Akalach 2006). Such data for effect of abamectin on P. plumifer has not been published yet.…”

“…Bostsanian and Akalach reported that abamectin was too toxic to all three tested predators (P. persimilis, Amblyseius fallacies, Orius insidiosus) to be of any value currently in IPM programs (Bostanian and Akalach 2006). In another study on abamectin tested field spray rates (3.99, 7.99, and 15.98 mg/L), few Galendromus occidentalis (Nesbitt) survived and fecundity was reduced.…”

Bioassay of some pesticides on two-spotted spider miteTetranychus urticaeKoch and predatory mitePhytoseiulus persimilisA-H

“…Generally, natural enemies are usually more susceptible to the effects of pesticides than their plant-feeding hosts or prey owing to their generally smaller size, searching habits, and usually less-developed enzyme-based detoxification systems (Charlet, 1995). Bostanian and Akalach (2006) reported that the contact toxicity of dimethoate, abamectin and insecticidal soap to Amblyseius fallacis (Garman), Phytoseiulus persimilis Athias-Henriot and nymphs of Orius insidiosus (Say) was very toxic to all three beneficial adults. Kenneth et al (2002) reported the effects of acaricide residues on P. persimilis and T. urticae using a leaf disk system.…”

Ecology and Role of the Rove Beetle, <i>Dalotia coriaria</i>, and Insidious Flower Bug, <i>Orius insidiosus</i>, in Greenhouse Biological Control Programs

“…[78] [82] support the presumption that insect growth regulators (e.g., azadirachtin, buprofezin, kinoprene, and pyriproxyfen), in general, are not directly or indirectly harmful to either natural enemy under laboratory conditions. In addition, the insect growth regulators, cyromazine, diflubenzuron, and novaluron are not directly harmful to D. coriaria adults after 96 hours of exposure [28].…”