Behaviour of Aphidius colemani Searching for Aphis gossypii: Functional Response and Reaction to Previously Searched Aphid Colonies

Steenis, M.J. van; El-Khawass, K.A.M.H.

doi:10.1080/09583159550039783

Cited by 37 publications

(33 citation statements)

References 11 publications

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“…1). Steenis & El-Khawass (1995), utilizando metodologia semelhante, encontraram uma resposta funcional tipo III, sigmóide, para o número de A. gossypii atacados por A. colemani. É provável que fatores como a preferência influenciem o tipo de resposta funcional apresentada pelos parasitóides (Hassel 1986), podendo um parasitóide apresentar diferentes tipos de resposta funcional dependendo da espécie do hospedeiro avaliado.…”

Section: Resultsunclassified

“…Esses resultados sugerem que, na maior densidade testada, o parasitóide apresentou maior mobilidade, fazendo com que sua busca pelo hospedeiro fosse intensificada, aumentando o número de hospedeiros avaliados. Steenis & El-Khawass (1995), ao observarem A. colemani sobre ninfas de 2º ínstar de A. gossypii e Pandey et al (1982) testando o parasitóide T. indicus sobre ninfas de 3º ínstar de A. craccivora encontraram resultados semelhantes, com o número de encontros crescente com o aumento da densidade do hospedeiro.…”

Section: Resultsunclassified

“…De acordo com Steenis & El-Khawass (1995) o tempo da primeira visita de A. colemani sobre A. gossypii aumenta com o aumento da população do hospedeiro. Na densidade zero, o parasitóide permanecia em média 22,6 segundos, tempo significativamente menor do que a média das densidades mais baixas (um, dois, quatro, seis, oito e 10 hospedeiros) quando permanecia por 63,9 segundos, sendo observada a capacidade de A. colemani em distinguir entre a presença e a ausência de hospedeiros no sítio de forrageamento.…”

Section: Resultsunclassified

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Parasitismo de Aphidius colemani Viereck (Hymenoptera: Aphidiidae) em diferentes densidades de Myzus persicae (Sulzer) (Hemiptera: Aphididae)

Sampaio¹,

Bueno²,

Pérez‐Maluf³

2001

Neotrop. Entomol.

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-This research aimed to determine the functional response of parasitoid Aphidius colemani Viereck, by determining the number of mummies of Myzus persicae (Sulzer) formed and its sexual ratio at densities of 20, 40, 60 and 80 2 nd -and 3 rd -instar nymphs on sweet-pepper leaves, at temperature of 21±1ºC. The functional response was also evaluated by calculating the number of attacks of the parasitoid on the host and its search behaviour on leaf discs of sweet-pepper leaves (43mm) in a Petri dish (50mm). The temperature of 23±1ºC and the densities of zero, four, eight, 16 and 32 nymphs of M. persicae were used. A. colemani's functional response was of type II, not only for number of mummies formed (12.4; 22.7; 33.0 and 31.6) but also for number of attacks (0; 4.1; 6.8; 13.2; and 19.2), with a gradual increase in the number of host density and reaching a plateau. The average sexual ratio was 0.57 and showed no significant influence in host density (P≤0.05). The number of contacts made by parasitoid's antennae onto their hosts (encounters) increased gradually with higher host densities, with an abrupt increase in the highest density (32 hosts), indicating an increase in searching behaviour of the parasitoid. The time of the first visit of A. colemani has not varied with the host density. In the presence of hosts it lasted from 1526.9 to 1638.0 seconds; in the absence of host, the parasitoid stayed on the leaf disc for a short time (340.1 seconds).

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Section: Resultsunclassified

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Parasitismo de Aphidius colemani Viereck (Hymenoptera: Aphidiidae) em diferentes densidades de Myzus persicae (Sulzer) (Hemiptera: Aphididae)

Sampaio¹,

Bueno²,

Pérez‐Maluf³

2001

Neotrop. Entomol.

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“…The functional response of a parasitoid to host density could also be an important trait influencing the successful control of aphid populations (van Steenis and Elkhawass 1995;Jones et al 2003;Zamani et al 2006). For success, it is sometimes assumed that a parasitoid must exhibit a Type III response in order to provide density dependent regulation of aphid populations (Liu 1985;Hughes et al 1992;van Steenis and Elkhawass 1995;Jones et al 2003;Zamani et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Host instar preference and functional response of Aphidius transcaspicus, a parasitoid of mealy aphids (Hyalopterus species)

Latham

Mills

2012

BioControl

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Aphidius transcaspicus Telenga (Hymenoptera: Braconidae: Aphidiinae) has been selected for use as a biological control agent against Hyalopterus pruni Geoffroy (Hemiptera: Aphididae) in prune orchards in California. In this study we focus on the host instar preference and functional response of A. transcaspicus. Host instar preference was determined using laboratory arenas by allowing female parasitoids to attack aphids on field-collected leaves of Prunus domestica L. supporting a natural range of H. pruni instars. A relative preference index indicated that A. transcaspicus was 1.4 times more likely to attack intermediate instars (2-4) than 1st or adult instars. The functional response of A. transcaspicus to H. pruni density was determined on enclosed P. domestica shoots in a prune orchard. The functional response to host density was linear (Type I) at the lowest aphid densities, and the asymptotic number of aphids attacked at higher aphid densities was 64.3 ± 6.7 aphids day -1 .

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“…The high potential of A. colemani to reduce the numbers of the smaller hosts is likely to positively affect its effectiveness. This is because aphids parasitized early in their life are unlikely to produce offspring (van Steenis & El-Khawass, 1995) and young aphids are more abundant in the early stages of aphid population increase (Lykouressis, 1982;Lykouressis & van Emden, 1983;Kouamé & Mackauer, 1991).…”

Section: Discussionmentioning

confidence: 99%

Effect of female size on host selection by a koinobiont insect parasitoid (Hymenoptera: Braconidae: Aphidiinae)

Lykouressis¹,

Garantonakis²,

Perdikis³

et al. 2009

Eur. J. Entomol.

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Abstract. Body size is a main fitness component of insect parasitoids. We assessed the potential influence of maternal size of the parasitoid wasp Aphidius colemani Viereck (Hymenoptera: Braconidae: Aphidiinae) on its ability to parasitize the different instars of Aphis gossypii Glover (Hemiptera: Aphididae) on eggplant and cucumber. In the experiments "small" vs "large" parasitoid females were used. Females oviposited in all instars but more of the smaller hosts were parasitized. Host selection was affected by female size and the larger hosts were more frequently mummified by the large than the small females. Thus, parasitoid female size influenced host selection. This could affect the potential of the parasitoid to exploit populations of aphids that differ in their size structure. The importance of these results in terms of the ecological adaptations of the parasitoid and their implication for biological control are discussed.

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Behaviour of Aphidius colemani Searching for Aphis gossypii: Functional Response and Reaction to Previously Searched Aphid Colonies

Cited by 37 publications

References 11 publications

Parasitismo de Aphidius colemani Viereck (Hymenoptera: Aphidiidae) em diferentes densidades de Myzus persicae (Sulzer) (Hemiptera: Aphididae)

Parasitismo de Aphidius colemani Viereck (Hymenoptera: Aphidiidae) em diferentes densidades de Myzus persicae (Sulzer) (Hemiptera: Aphididae)

Host instar preference and functional response of Aphidius transcaspicus, a parasitoid of mealy aphids (Hyalopterus species)

Effect of female size on host selection by a koinobiont insect parasitoid (Hymenoptera: Braconidae: Aphidiinae)

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