scholarly journals Effects of selective insecticides on host searching and oviposition behavior of Neochrysocharis formosa (Westwood) (Hymenoptera: Eulophidae), a larval parasitoid of the American serpentine leafminer

2004 ◽  
Vol 39 (3) ◽  
pp. 435-441 ◽  
Author(s):  
Dang Hoa Tran ◽  
Masami Takagi ◽  
Keiji Takasu
Keyword(s):  
Oviposition Behavior ◽  
Host Searching ◽  
Larval Parasitoid ◽  
Neochrysocharis Formosa ◽  
Serpentine Leafminer ◽  
Selective Insecticides

scholarly journals Biological Control May Fail on Pests Applied with High Doses of Insecticides: Effects of Sub-Lethal Concentrations of a Pyrethroid on the Host-Searching Behavior of the Aphid Parasitoid Aphidius colemani (Hymenoptera, Braconidae) on Aphid Pests

Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 539
Author(s):  
Armando Alfaro-Tapia ◽  
Jeniffer K. Alvarez-Baca ◽  
Eduardo Fuentes-Contreras ◽  
Christian C. Figueroa
Keyword(s):  
Biological Control ◽  
Natural Enemies ◽  
Insect Pests ◽  
Oviposition Behavior ◽  
Rapid Evolution ◽  
Parasitoid Wasp ◽  
Host Searching ◽  
Aphid Parasitoid ◽  
Aphidius Colemani ◽  
Lethal Doses

The use of synthetic insecticides may cause failures in the biological control of insect pests due to undesired side effects on natural enemies and the rapid evolution of insecticide resistance in agroecosystems. Residues of neurotoxic insecticides can interfere with the recognition of chemical cues used by natural enemies to find pests. We investigated the effects of sub-lethal concentrations of the pyrethroid lambda-cyhalothrin on the interaction between the aphid parasitoid wasp Aphidius colemani and the peach potato aphid Myzus persicae. We studied changes in host-searching and oviposition behavior through laboratory bioassays when susceptible and kdr-resistant aphids are offered to parasitoid females, evaluating the effect of applying insecticides on the interacting species. The patch residence time, exploration, oviposition, and grooming were significantly disturbed when the parasitoids were offered resistant aphids sprayed with sub-lethal doses, but not when the parasitoids were offered susceptible M. persicae exposed to sub-lethal doses. We discuss how the effects of insecticides on parasitism behavior may result in failures of biological control if natural enemy populations are not adequately managed, particularly for the management of insecticide-resistant pest populations. Efforts to introduce biological control in integrated pest management (IPM) programs are also discussed.

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