Host recognition and acceptance behaviour in Cotesia sesamiae and C. flavipes (Hymenoptera: Braconidae), parasitoids of gramineous stemborers in Africa

Calatayud, Paul‐André; Rü, Bruno Le; Obonyo, Meshack; Schulthess, Fritz; Berg, Johann Van den

doi:10.14411/eje.2010.022

Cited by 12 publications

(11 citation statements)

References 42 publications

(44 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Statistical analyses were performed by using SPSS 13.0 for Windows (SPSS 1997). Proportion data of two groups were subjected to the 2 test; proportion data of three groups Þrst were analyzed using the 2 test for signiÞcance of temperature treatment, signiÞcant differences between pairs of proportions were identiÞed with the MarascuiloÕs procedure (Marascuilo 1966, Obonyo et al 2010. Duration data were subjected to analysis of variance, and the means separated by TukeyÕs HSD test where there is a signiÞcant inßuence of temperature treatment.…”

Section: Methodsmentioning

confidence: 99%

Effects of Temperature on Mate Location in the Planthopper,Nilaparvata lugens(Homoptera: Delphacidae)

Ying

Shi

et al. 2012

Environ Entomol

View full text Add to dashboard Cite

The planthopper, Nilaparvata lugens Stål (Homoptera: Delphacidae), uses acoustic signals generated by abdominal vibration and transmitted through rice (Oryza sativa L.) plants to locate mates. The influence of temperature (20, 28, and 32°C) on abdominal vibration patterns of individual females and males, proportion of mated females, and responsivity of male to female vibrational signals was investigated. When female and male adults were observed individually, temperatures of 20 and 32°C inhibited abdominal vibration by both genders in terms of proportion of vibrating insects, time spent in vibration per insect, time spent per bout of vibration, or all of these; the effects were more pronounced at 32°C than at 20°C especially in males at 32°C. Although not significantly different, male responsivity to vibrating female was relatively high at 28°C, lower at 32°C, and still lower at 20°C, and finally more males located females at 28°C than at 20°C, which contributes to the higher proportion of mated females at 28°C than at 20 or 32°C. Our results indicate that temperatures of 20 and 32°C inhibit the production of abdominal vibration and, to some extent, reduce male responsivity to female vibrational signals, which may partially explain the frequent population outbreaks in N. lugens in the years with warm autumn.

show abstract

Section: Methodsmentioning

confidence: 99%

Effects of Temperature on Mate Location in the Planthopper,Nilaparvata lugens(Homoptera: Delphacidae)

Ying

Shi

et al. 2012

Environ Entomol

View full text Add to dashboard Cite

show abstract

“…In addition, this supposes that the parasitoids can perceive the α-amylase through their sensorial equipment. Obonyo et al (2010a) observed that female parasitoids use the tip of their antennae to recognize and accept their host larvae for oviposition. They identified the presence of specific sensilla known to have gustatory functions in insects on the last antennal segment (Obonyo et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…According to Obonyo et al (2010a), all behavioral experiments were carried out in a room at 26 ± 1 • C between 10 a.m. and 2 p.m. with a constant source of light to maintain an optimal temperature for the behavioral activities of the female parasitoids.…”

Section: Behavioral Bioassaysmentioning

confidence: 99%

Salivary α-Amylase of Stem Borer Hosts Determines Host Recognition and Acceptance for Oviposition by Cotesia spp. (Hymenoptera, Braconidae)

Bichang'a¹,

Lage²,

Sambai³

et al. 2018

Front. Ecol. Evol.

Self Cite

View full text Add to dashboard Cite

Foraging insect parasitoids use specific chemical cues to discriminate between host and non-host species. Several compounds have been identified in "host location and acceptance." However, nothing is known about the molecular variations in these compounds that could account for host-range differences between parasitoid species. In a previous study, it was shown that during the host-finding process, contact between the braconid Cotesia flavipes and its host is crucial, and that α-amylase of oral secretions from the host plays a key role for host acceptance and oviposition by the parasitoid. The present study sought to establish whether the variations in this enzyme could explain specific host recognition in different host-parasitoid associations. Different species and populations of the C. flavipes complex specialized on graminaceous lepidopteran stemborers were used. Electrophoresis of α-amylase revealed different isoforms that mediate the parasitoid's oviposition acceptance and preference for a specific host. This discovery opens up new avenues for investigating the evolutionary processes at play in chemically-mediated host specialization in the species-rich Cotesia genus.

show abstract

“…Obonyo et al (2010a) observed that female parasitoids (including C. flavipes ) use the tip of their antennae to recognize and accept their host larvae for oviposition. They identified on the last antennal segment the presence of uniporous sensilla chaetica known to have gustatory functions in insects (Obonyo et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies have shown that VOCs do not convey reliable information to Cotesia flavipes species complex, which includes C. flavipes and C. sesamiae , on the suitability of caterpillar species but they are mere indicators of the presence of herbivores (Ngi-Song and Overholt, 1997; Obonyo et al, 2008). It is only when approaching the host that reliable information on host’ identity is perceived for which tactile and contact-chemoreception stimuli from the hosts play a major role in host recognition and oviposition, and it is hypothesized that protein(s) present in the host’s oral secretions are involved (Obonyo et al, 2010a; 2010b; 2011).…”

Section: Introductionmentioning

confidence: 99%

The use of salivary α-amylase as an evolutionary solution to host selection in parasitoids

Bichang'a

Mailhan³

et al. 2017

Preprint

Self Cite

View full text Add to dashboard Cite

Foraging parasitoids use chemical signals in host recognition and selection processes. Thereby, chemicals from the herbivore hosts play a crucial role. When different herbivores are present in the same plant or field, the perception of specific volatiles and contact compounds emitted from the host itself enable the parasitoids both to differentiate between hosts and non-hosts and to estimate the health status of its host. During the host feeding process, contact between the parasitoid and its host is very crucial, and oral secretions from the host play a key role during the first contact for such evaluation by the parasitoid. Using an integration of behavioral observations, biochemical and sensory physiological approaches we demonstrate that female parasitoids of Cotesia flavipes recognize their host and oviposit in reaction to an α-amylase, which is present in the oral secretions of the larvae of their host, Chilo partellus. This activity was also mediated by a purified α-amylase synthetized from Drosophila melanogaster. Using this synthetized enzyme, we further demonstrate that the conformation of the enzyme rather than its catalytic site is responsible for this activity. This enzyme is activating gustatory neurons of the terminal antennal sensilla chaetica of C. flavipes females. α-amylases are therefore good candidates for an evolutionary solution to host selection in parasitoids, thus opening new avenues for investigations in hosts-parasitoids interactions.

show abstract

Host recognition and acceptance behaviour in Cotesia sesamiae and C. flavipes (Hymenoptera: Braconidae), parasitoids of gramineous stemborers in Africa

Cited by 12 publications

References 42 publications

Effects of Temperature on Mate Location in the Planthopper,Nilaparvata lugens(Homoptera: Delphacidae)

Effects of Temperature on Mate Location in the Planthopper,Nilaparvata lugens(Homoptera: Delphacidae)

Salivary α-Amylase of Stem Borer Hosts Determines Host Recognition and Acceptance for Oviposition by Cotesia spp. (Hymenoptera, Braconidae)

The use of salivary α-amylase as an evolutionary solution to host selection in parasitoids

Contact Info

Product

Resources

About