A parasitoid's dilemma between food and host resources: the role of volatiles from nectar-providing marigolds and host-infested plants attracting Aphidius platensis

Autor(es)

Souza, Ivana Lemos ^[1] ; Silva, Diego Bastos ^[2] ; Silveira, Luis Claudio Paterno ^[1] ; Bento, Jose Mauricio Simoes ^[2] ; Penaflor, Maria Fernanda Gomes Villalba ^[1] ; Marucci, Rosangela Cristina ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ Lavras UFLA, Dept Entomol, POB 3037, BR-37200000 Lavras, MG - Brazil

^[2] Univ Sao Paulo, Dept Entomol & Acarol, Luiz de Queiroz Coll Agr ESALQ, POB 9, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: NATURWISSENSCHAFTEN; v. 109, n. 1 FEB 2022.
• Citações Web of Science: 0

Resumo

The use of nectar-producing companion plants in crops is a well-known strategy of conserving natural enemies in biological control. However, the role of floral volatiles in attracting parasitoids and effects on host location via herbivore-induced plant volatiles is poorly known. Here, we examined the role of floral volatiles from marigold (Tagetes erecta), alone or in combination with volatiles from sweet pepper plant (Capsicum annuum), in recruiting Aphidius platensis, an important parasitoid of the green peach aphid Myzus persicae. We also investigated whether marigold floral volatiles are more attractive to the parasitoid than those emitted by sweet pepper plants infested by M. persicae. Olfactometry assays indicated that floral volatiles attracted A. platensis to the marigold plant and are more attractive than sweet pepper plant volatiles. However, volatiles emitted by aphid-infested sweet pepper were as attractive to the parasitoid as those of uninfested or aphid-infested blooming marigold. The composition of volatile blends released by uninfested and aphid-infested plants differed between both blooming marigold and sweet pepper, but the parasitoid did not discriminate aphid-infested from uninfested blooming marigold. Volatile released from blooming marigold and sweet pepper shared several compounds, but that of blooming marigold contained larger amounts of fatty-acid derivatives and a different composition of terpenes. We discuss the potential implications of the aphid parasitoid attraction in a diversified crop management strategy. (AU)

• Processo FAPESP: 14/50871-0 - INCT 2014: Instituto Nacional de Ciência Tecnologia de Semioquímicos na Agricultura
• Beneficiário: José Roberto Postali Parra
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/12771-0 - Uso de mirídeos predadores no controle biológico de pragas
• Beneficiário: Diego Bastos Silva
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado