Structure and sensory equipment of the ovipositor of Habrobracon hebetor (Say) (Hymenoptera: Braconidae)

Dweck, Hany K.M.; Gadallah, Neveen S.; Darwish, Essam

doi:10.1016/j.micron.2008.03.012

Cited by 35 publications

(43 citation statements)

References 26 publications

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“…The Ba.5 on the ovipositor of C. caragana were similar to campaniform sensilla in Hymenoptera (Cônsoli et al, 1999;Dweck et al, 2008;Le Ralec and Wajnberg, 1990). We suggest that Ba.…”

Section: Sensilla Basiconicamentioning

confidence: 50%

Ultrastructure of antennal and posterior abdominal sensilla in Chlorophorus caragana females

Zhang

Ren

Zhang

et al. 2015

Micron

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“…The Ba.5 on the ovipositor of C. caragana were similar to campaniform sensilla in Hymenoptera (Cônsoli et al, 1999;Dweck et al, 2008;Le Ralec and Wajnberg, 1990). We suggest that Ba.…”

Section: Sensilla Basiconicamentioning

confidence: 50%

Ultrastructure of antennal and posterior abdominal sensilla in Chlorophorus caragana females

Zhang

Ren

Zhang

et al. 2015

Micron

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“…As seen in B. vulgaris, trichoid sensilla of different sizes have been observed along V3 in several other braconid species, among them Macrocentrus cingulum (Ahmed et al, 2013), Spathius agrili Yang (Wang et al, 2010a), and Habrobracon hebetor Say (Dweck et al, 2008). These non-porous and mechanoreceptor structures possibly detect air currents and vibrations from the host's feeding and locomotion and are essential to parasitoids when selecting hosts.…”

Section: Discussionmentioning

confidence: 95%

“…According to Dweck & Gadallah (2008), placode sensilla exhibit elongated mor phology and are widely distributed in the parasitoid's antennae. These sensilla, morphologically identical to those observed in this study in B. vulgaris, were de scribed by Ochieng et al (2000) in a study on the braconid Microplitis croceipes.…”

Section: Discussionmentioning

confidence: 99%

“…According to Le Ralec et al (1996) and Dweck et al (2008), most parasitoids are endowed with specificity as to their targeted hosts, practicing attacks that are restricted to a number of the host's species and particular developmental stages. A successful parasitoid must present structural modifications that favor parasitism, thus the ovipositor's morphological and functional characteristics are directly pro portional to the host's characteristics, its habit, and habitat.…”

Section: Discussionmentioning

confidence: 99%

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Parasitoid-host interaction: sensory structures involved in the parasitism behavior of Bracon vulgaris (Hymenoptera: Braconidae)

et al. 2014

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Parasitoids have evolved mechanisms to evade their hosts' defenses. Bracon vulgaris (Ashmead) is a larval ectoparasitoid responsible for natural reduction of Anthonomus grandis (Boheman) and Pectinophora gossypiella (Saunders), which are considered the main cotton pests in the cotton agro ecosystem in northeastern Brazil. This study aimed to analyze the sensory structures (antennae and ovipositor) involved in the parasitism behavior of B. vulgaris, and to describe and evaluate associations between composition, morphology, and functions of these structures in the parasitoid-host interaction. Results showed that the B. vulgaris ovipositor is a multifunctional structure of 2.7 ± 0.3 mm in length composed of 3 valves. Valves 1 and 2 are elongated, rigid, and act jointly to pierce the host's cuti cle, to inject the poison glands secretion, and to deposit eggs. Valve 3 covers the other valves, giving them protection. Valve 3 also presents annulations in all its extension, which gives flexibility to the ovipositor, and trichoid sensilla that possibly capture vibrations from the host's feeding and loco motion, thereby aiding the parasite in the host selection. The presence of cuticular microtrichia was possibly responsible for the cleaning of the ovipositor, keeping it functional between the various inser tions that occur during the parasitism behavior. The parasitoid's antennae are filliform-like, measure about 2 mm, and are composed of four types of sensilla (trichoids, basiconical, coeloconical, and pla codes) that act as olfactory and gustatory receptors and/or express tactile, thermo,-and hygroreception functions. The integrated action of these sensory components corroborates the successful parasitism behavior of the parasitoid B. vulgaris.

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“…Habrobracon hebetor Say is a gregarious, idiobiont and larval ectoparasitoid of pyralid and noctuid moths (Magro and Parra 2001;Dweck et al 2008). This parasitoid can easily be mass reared and it has been released in the field for effective control of Heliothis and Helicoverpa spp.…”

Section: Introductionmentioning

confidence: 99%

Effects of Azadirachtin, Cypermethrin, Methoxyfenozide and Pyridalil on Functional Response of Habrobracon Hebetor Say (HYM.: Braconidae)

Abedi¹,

Saber²,

Gharekhani³

et al. 2012

Journal of Plant Protection Research

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Abstract:Habrobracon hebetor Say is one of the most important natural enemies of the Helicoverpa armigera Hübner (Lep.: Noctuidae). In this study, the sublethal effects of LC 30 concentration of azadirachtin, cypermethrin, methoxyfenozide and pyridalil on the functional response of H. hebetor to different densities of 5th instars larvae of Ephestia kuehniella Zeller were evaluated. Young females were exposed to LC 30 of the insecticides for an appropriate time of exposure. Then, six randomly selected alive females were transferred individually to plastic Petri dishes (10 cm in diameter) and supplied with the following densities: 2, 4, 8, 16, 32 and 64 of 5th instars of E. kuehniella for 24 h. Eight replicates were considered for each insecticide treatment and the control. The results revealed a type II functional response in the control, and all of the insecticide treatments. This study showed that the control and the cypermethrin treatment had the shortest (0.4143 h) and longest (0.624 h) handling time, respectively. The highest (0.0035 per hour) and lowest (0.0029 per hour) attack rate was observed in pyridalil and cypermethrin treatments, respectively. Based on values of handling time, cypermethrin had the highest adverse effect on host-finding in H. hebetor.

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Structure and sensory equipment of the ovipositor of Habrobracon hebetor (Say) (Hymenoptera: Braconidae)

Cited by 35 publications

References 26 publications

Ultrastructure of antennal and posterior abdominal sensilla in Chlorophorus caragana females

Ultrastructure of antennal and posterior abdominal sensilla in Chlorophorus caragana females

Parasitoid-host interaction: sensory structures involved in the parasitism behavior of Bracon vulgaris (Hymenoptera: Braconidae)

Effects of Azadirachtin, Cypermethrin, Methoxyfenozide and Pyridalil on Functional Response of Habrobracon Hebetor Say (HYM.: Braconidae)

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