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Hassan, S.A., Halsall, N., Gray, A.P., Kuehner, C., Moll, M.F., Bakker, M., Roembke, J., Yousef, A., Nasr, F. and Abdelgader, H. (2000) A Laboratory Method to Evaluate the Side Effects of Plant Protection Products on Trichogramma cacoeciae Marchal (Hym., Trichogrammatidae). In: Candolfi, M.P., et al., Eds., Guidelines to Evaluate Side-Effects of Plant Protection Products to Non-Target Arthropods, IOBC/WPRS, 107-119.

has been cited by the following article:

• TITLE: Effect of Insecticides on Trichogramma Parasitoids Used in Biological Control against Prays oleae Insect Pest

  AUTHORS: Imen Blibech, Mohieddine Ksantini, Taieb Jardak, Mohamed Bouaziz

  KEYWORDS: Insecticide Effect, Trichogramma Species, Olive Tree, Parasitism Viability, Emergence Time

  JOURNAL NAME: Advances in Chemical Engineering and Science, Vol.5 No.3, July 20, 2015

  ABSTRACT: This study investigated the direct effect of the insecticides deltamethrin and spinosad on three egg parasitoids species: Trichogramma oleae, T. cacoeciae and T. bourarachae. The parasitoid pupae were exposed to pesticide residues on fresh olive tree leaves at recommended concentrations (RC) at different time intervals: 3, 10, 17, 24 and 31 days after pesticide applications. Parasitism viability (% emergence from parasitized eggs) and adult emergence time (developmental time from pupa to adult emergence) were evaluated. Regarding to the International Organization of Biological Control (IOBC) guidelines, results of toxicity effects of insecticides show that: Deltamethrin was moderately harmful to all Trichogramma species at RC (Decis® 100 milliliters·ha−1), however, spinosad was harmless to moderately harmful at RC (Tracer® 20 milliliters·ha−1). Trichogramma species revealed differences with regard to adult emergence time and exhibited significant changes in parasitism viability with increasing time after pesticide treatment. While deltamethrin residues affected parasitism viability 31 days after the product application, spinosad displayed similar viability for almost species 24 days after the application. The usefulness of Trichogramma parasitoids used as biological control agents, in olive tree ecosystem, was discussed in integrated pest management programs for Prays oleae control when parasitoid species were exposed during pupal stage to the insecticide residue.