Effects of Some Insecticides on Functional Response of Ectoparasitoid, Habrobracon hebetor (Say) (Hym.: Braconidae)

Rafiee-Dastjerdi, Hooshang; Hejazi, Mohammad Saeid; Ganbalani, Gadir Nouri; Saber, Moosa

doi:10.3923/je.2009.161.166

Cited by 28 publications

(16 citation statements)

References 13 publications

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“…Mahdavi-ParchinSofla (2011) conciliated the sublethal effects of abamectin, carbaryl, chlorpayrifos and spinosad on the functional response of ectoparasitoid H. hebetor, and reported a type III response for all treatments and the control. The results of this study are consistent with the results of Rafiee-Dastjerdi et al (2009), who reported that the functional response of H. hebetor to host density in insecticide treatments and the control was type II. Claver et al (2003) studied the effect of cypermetrin on the functional response of Acanthaspis pedestris (Stal) (Het., Reduviidae) and reported a functional response of type II which is consistent with our results.…”

Section: Discussionsupporting

confidence: 83%

“…Fifth instars of E. kuehniella were used for all the experiments as the host. Honey was presented as food for the adult parasitoids on a stripe of paper (Rafiee-Dastjerdi et al 2009). …”

Section: Insectsmentioning

confidence: 99%

“…Furthermore, given that chemical compounds may affect host-finding behavior and behavioral responses of natural enemies, the effect of pesticides on the functional response of the natural enemies is evaluated. Rafiee-Dastjerdi et al (2009) showed that profenofos, thiodicarb, hexaflumuron and spinosad had a negative effect on the functional response of H. hebetor.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionsupporting

confidence: 83%

“…Fifth instars of E. kuehniella were used for all the experiments as the host. Honey was presented as food for the adult parasitoids on a stripe of paper (Rafiee-Dastjerdi et al 2009). …”

Section: Insectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…This study followed the approach presented by Dastjerdi et al (2009) and Bayram et al (2010). Approximately 60 fed, newly emerged (Ͻ6 h after emergence) T. chilonis were introduced into a membraneforming glass dactylethrae (2.3-cm internal diameter, 7.4-cm internal height; treated with LC 30 of insecticides or distilled water for control), and the dactylethrae was closed with black nylon fabric to allow air circulation.…”

Section: Methodsmentioning

confidence: 99%

Acute Toxicities and Sublethal Effects of Some Conventional Insecticides on <I>Trichogramma chilonis</I> (Hymenoptera: Trichogrammatidae)

Wang¹,

He²,

XiangLing³

et al. 2012

jnl. econ. entom.

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The acute toxicity of 10 conventional insecticides to adult of Trichogramma chilonis Ishii (Hymenoptera: Trichogrammatidae) was bioassayed by membrane method, and then their sublethal effects on the parasitoid were evaluated in the laboratory. Based on sublethal concentration (LC30) values at 8 h after treatment, we determined that adult T. chilonis were the most susceptible to chlorfenapyr, followed by fipronil, spinosad, avermectins, beta-cypermethrin, and cartap, with lethal concentration (LC)30 values of 0.3133, 0.3269, 1.5408, 3.2961, 6.1469, and 9.021 mg/liter, respectively. The field-recommended concentrations of chlorfluazuron, indoxacarb, Bacillus thuringiensis, and tebufenozide caused <30% mortality of treated adults; therefore, they were used to evaluate sublethal effects on the parasitoid. After treatment with sublethal concentration of fipronil and avermectins, the longevity of treated females (1.2 and 1.6 d) was significantly shortened and fecundity (34.7 and 1.6) was remarkably decreased; consequently, the life-table parameters (R0, r(m), lambda, and T) of T. chilonis were statistically lower than those in the control. Cartap and spinosad also reduced longevity (8 and 7.9 d) and fecundity (110.77 and 117.2) of treated adults, but cartap enhanced the female percentage of F1 offspring (61.6%), resulting a statistical higher R0, r(m), and lambda of treated T. chilonis. In contrast, chlorfluazuron and tebufenozide increased longevity (16.4 and 15.4 d) and fecundity (248 and 256.9) of treated adults but slightly decreased the female percentage of F1 offspring (31.4 and 38.1%). Although chlorfenapyr showed no adverse influence on longevity and fecundity, it remarkably reduced the female percentage of F1 offspring (13.5%), leading to a lower R0, r(m), and lambda of treated T. chilonis. Indoxacarb, B. thuringiensis, and beta-cypermethrin had no obvious sublethal effects on the longevity and fecundity of treated adults. Based on these results, we consider B. thuringienesis, chlorfluazuron, indoxacarb, beta-cypermethrin, and tebufenozide safe to T. chilonis, suggesting that these insecticides are compatible with this parasitoid when being used in the field. However, fipronil, chlorfenapyr, spinosad, and avermectins were very harmful to T. chilonis. Timing of application of these insecticides was critical.

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“…Seven fifth instar host larvae were supplied daily for oviposition. Seven larvae were used because the upper limit of host parasitization per wasp is seven per day (Rafiee Dastjerdi et al 2009). The daily survival of each individual and fecundity of each female were recorded.…”

Section: Life Table Parametersmentioning

confidence: 99%

Comparative study of the population level effects of carbaryl and abamectin on larval ectoparasitoid Habrobracon hebetor Say (Hymenoptera: Braconidae)

et al. 2011

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Habrobracon hebetor Say is one of the most important ectoparasitoids of the larval stage of many invasive agricultural pests such as noctuid and pyralid moths. Lethal and sublethal effects of carbaryl and abamectin were assessed on the ectoparasitoid H. hebetor in laboratory conditions. Dose-response bioassays were carried out on immature and adult stages by using dipping and contact residue methods, respectively. LC 50 (lethal concentration for 50%) values of carbaryl and abamectin were 31.19 and 4.16 mg a.i. l -1 on larval stage and 12.6 and 4.42 mg a.i. l -1 on adults, respectively. In order to assess the sublethal effects, adult wasps were exposed to an LC 30 of each insecticide and then the demographic parameters of live wasps were studied. The results showed that the intrinsic rate of increase (r m ), finite rate of increase (k), net reproductive rate (R 0 ) and gross reproductive rate (GRR) were significantly affected by the insecticides. The highest and the lowest r m values were 0.23 and 0.17 in control and carbaryl-treated insects, respectively. The sex ratio of H. hebetor offspring was not significantly affected by either insecticide. The results showed that carbaryl had more adverse effects on population parameters of the parasitoid compared to abamectin. Field studies are needed to determine the total effects of the pesticides on H. hebetor.

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Effects of Some Insecticides on Functional Response of Ectoparasitoid, Habrobracon hebetor (Say) (Hym.: Braconidae)

Cited by 28 publications

References 13 publications

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

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

Acute Toxicities and Sublethal Effects of Some Conventional Insecticides on <I>Trichogramma chilonis</I> (Hymenoptera: Trichogrammatidae)

Comparative study of the population level effects of carbaryl and abamectin on larval ectoparasitoid Habrobracon hebetor Say (Hymenoptera: Braconidae)

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