Entomologia Generalis (2018) 38, 173-190

Neda Amini Jam and Moosa Saber (2018)
Sublethal effects of imidacloprid and pymetrozine on the functional response of the aphid parasitoid, Lysiphlebus fabarum
Entomologia Generalis 38 (2), 173-190
Abstract: Lysiphlebus fabarum (Marshall) is one of the most important parasitoid of Aphis fabae Scopoli. Pesticide applications may interfere with the behavior of the parasitoids. In this study, the acute toxicity of imidacloprid and pymetrozine was assessed against adult parasitoids by residual contact on dry residues, and lethal concentration (LC50) values were determined for both chemicals. Moreover, the functional response of L. fabarum exposed to the insecticides was studied as a behavioral endpoint of non-target effects. Functional response studies were carried out on young adults exposed to low-lethal concentration (LC25) of either insecticides by contact method, and on adults emerged from pupae exposed to field-recommended concentration of the insecticides by dipping mummified aphids in insecticide solution. The results showed that imidacloprid was more toxic than pymetrozine to adult stage of the parasitoid. This study revealed a type II functional response in all experiments. Imidacloprid negatively affected the attack rate (a), handling time (Th) and maximum attack rate (T/Th) of parasitoid compared to the control and pymetrozine treatment. Overall, pymetrozine showed lower side effects on the parasitoid and should be preferred to imidacloprid for inclusion in integrated pest management (IPM) programs against A. fabae.
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Link to article at publishers website
Database assignments for author(s): Moosa Saber

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aphis fabae
Lysiphlebus fabarum (parasitoid)	Aphis fabae