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Phytoparasitica (2016) 44, 91-98
Ardavan Mardani, Qodratollah Sabahi, Arash Rasekh and Ali Almasi (2016)
Lethal and sublethal effects of three insecticides on the aphid parasitoid, Lysiphlebus fabarum Marshall (Hymenoptera: Aphidiidae)
Phytoparasitica 44 (1), 91-98
Abstract: Lysiphlebus fabarum Marshall is the main parasitoid of the black bean aphid, Aphis fabae Scopoli. Lethal and sublethal effects of insecticides, thiacloprid+deltamethrin, pirimicarb and pymetrozine were evaluated on the parasitoid under laboratory conditions. One-day-old mummies were exposed to the recommended field concentration of either insecticides via dipping method. Adult emergences were reduced by 82.67, 19.98 and 10.67 % for thiacloprid+deltamethrin, pirimicarb and pymetrozine treatments, respectively. Thiacloprid+deltamethrin had the most adverse effect on the fecundity of the emerged females, while pirimicarb and pymetrozine did not have such effects. According to International organization for biological control (IOBC) insecticide toxicity classification, thiacloprid+deltamethrin resulted to be moderately harmful (E = 97.39%), whereas pirimicarb (E = 15.78%) and pymetrozine (E = 5.15%) were harmless. Thiacloprid+deltamethrin negatively affected five of the estimated demographic parameters (GRR, R 0 , r m , lambda and T ). Pirimicarb negatively affected GRR, R 0 and T, while it had no adverse effects on r m and lambda. None of the studied demographic parameters were affected by pymetrozine. Our results suggest that pirimicarb and pymetrozine can be considered as safe for L. fabarum, but that thiacloprid+deltamethrin can have serious detrimental of this parasitoid in the field.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Arash Rasekh
Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance to pesticides
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Aphis fabae | Broad/faba bean (Vicia faba) | Iran | ||
| Lysiphlebus fabarum (parasitoid) | Aphis fabae | Broad/faba bean (Vicia faba) | Iran |
