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- Title
Life-stage-dependent side effects of selected insecticides on <italic>Trichogramma cacoeciae</italic> (Marchal) (hymenoptera: Trichogrammatidae) under laboratory conditions.
- Authors
Asma, Cherif; Ons, Ichaoui; Sabrine, Barhoumi-Attia; Kaouthar, Lebdi-Grissa
- Abstract
<italic>Tuta absoluta</italic> (Meyrick) (Lepidoptera: Gelechiidae) is classified as one of the most harmful pest of tomato crops. Many species of predators and parasitoids including <italic>Trichogramma cacoeciae</italic> (Marchal) (Hymenoptera: Trichogrammatidae) are noted as potential candidates used for biological control of this pest. Therefore, the use of selective insecticides is critical to conserve and protect natural enemies in the field<bold>.</bold> This study assessed the side effects of insecticides on different development stages of <italic>T. cacoeciae</italic> under laboratory conditions. For this, eleven pesticides such as: Indoxacarb, spiromesifen, cyromazin, chlorfenapyr, cypermethrin, diafenthiuron, chlorantraniliprole, spinosad, azadirachtin, <italic>Bacillus thuringiensis (Bt)</italic> and virus HaNPV were tested. This study shows that indoxacarb, spiromesifen, chlorfenapyr, cypermethrin, diafenthiuron and spinosad had a negative effect on immature stages of <italic>Trichogramma</italic>. All insecticides residues on tomato leaves were found to be toxic to <italic>Trichogramma</italic> adults except azadirachtin, <italic>Bt</italic> and virus HaNPV. Therefore, the use of the tested natural products (azadirachtin, <italic>Bt</italic> and HaNPV) at the recommended doses is viable, having no negative impact on <italic>T. cacoeciae</italic> in tomato crops<italic>.</italic>
- Subjects
INSECTICIDES; TRICHOGRAMMA; HYMENOPTERA; TRICHOGRAMMATIDAE; GELECHIIDAE
- Publication
Phytoparasitica, 2018, Vol 46, Issue 1, p105
- ISSN
0334-2123
- Publication type
Article
- DOI
10.1007/s12600-018-0638-x