Data/hora: 24/06/2024 10:58:25

Biblioteca(s): | Embrapa Meio Norte / UEP-Parnaíba.
Data corrente: | 18/06/1996
Data da última atualização: | 18/01/2010
Autoria: | SRIVASTAVA, M.; SING, R.
Título: | Bionomics of Trioxys indicus, an Aphidiid parasitoid of Aphis craccivora. 26. Impact of host extract on the oviposition response of the parasitoid.
Ano de publicação: | 1988
Fonte/Imprenta: | Biological Agriculture and Horticulture, v. 5, p. 169-176, 1988.
Idioma: | Inglês
Conteúdo: | Female Trioxys indicus, an aphidiid parasitoid of the pigeonpea aphid Aphis craccivora, responded to aqueous extracts of the host topically sprayed on to holt-infested leaves by examining such areas intensely with their antannae. The host-extract application reduced the host search-time, thus increasing the probability of finding more hosts. By increasing the concentration of the host-extract on the host-patch, the frequencies of host contact, prick and oviposition behaviour increased significantly. Similarly, the retention period of the parasitoids with the hosts significantly increased which, when combined with their intensified behaviour, resulted in a higher degree of host parasitisation.The female parasitised 60% more hosts under host-extract exposure (200 aphid/ml) than with the control. Their area of discovery increased expotentially with increasing host-extract concentration. These studies suggest the value of using the host-extract in the mass culture of the parasitoid in the laboratory. The active ingredients functioning as host-seeking stimulants (kairomones) in the host-extract have yet tobe investigated.
Palavras-Chave: | Controle; Parasita.
Thesagro: | Afídeo.
Categoria do assunto: | --
Registro original: | Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP)
Exemplares: | CPAMN-UEPP - (6459-1) - ADP - SP - PP - SP 4045/1991 -  - SP4045/91 - DIS