Lethal and Sublethal Effects of Azadirachtin and Cypermethrin on &lt;I&gt;Habrobracon hebetor&lt;/I&gt; (Hymenoptera: Braconidae)

Abedi, Zahra; Saber, Moosa; Gharekhani, Gholamhossein; Mehrvar, Ali; Kamita, Shizuo G.

doi:10.1603/ec13227

Cited by 33 publications

(16 citation statements)

References 41 publications

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“…Many reports have indicated, however, that the application of an insecticide or acaricide at sublethal concentrations may cause pest numbers to increase rather than decline (Gerson & Cohen 1989;Morse & Zareh 1991;Zeng & Wang 2010). The stimulation of populations caused by sublethal concentrations of pesticides is incompletely understood but may result from a suppression of natural enemies (Dutcher 2007;Raupp et al 2010;Abedi et al 2014), a stimulation of reproduction, an increase in egg hatching, and an enhancement of pre-imaginal survivorship (Zeng & Wang 2010). Pyrethroid application may also result in increases in mite populations (Gerson & Cohen 1989;Chen & Chen 1990;Holland et al 1993).…”

Section: Discussionmentioning

confidence: 99%

“…The mites P. ulmi and T. urticae preferred esfenvalerate-free surfaces to treated surfaces; in addition, oviposition was negatively correlated with the concentration of esfenvalerate residues on surfaces (Bowi et al 2001). Very recently, pyrethroid cypermethrin were proved to have acute toxicity on larval and adult stages of Habrobracon hebetor and negatively affected most of its life table parameters (Abedi et al 2014).…”

Section: Discussionmentioning

confidence: 99%

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Effects of sublethal concentrations of bifenthrin on the two-spotted spider mite, Tetranychus urticae (Acari: Tetranychidae)

Wang

Tang²,

Wang³

et al. 2014

Systematic and Applied Acarology

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Bifenthrin is a broad-spectrum insecticide and acaricide that is widely used in China. We evaluated the effects of sublethal concentrations (LC 10 and LC 25 ) of bifenthrin on the eggs and adult females of the two-spotted spider mite, Tetranychus urticae, in the laboratory at 26±1°C, 80% RH, and a 16 h: 8 h (L: D) photoperiod. The sublethal doses of bifenthrin decreased the intrinsic and finite rate of increase, net reproductive rate, survival rate, and reproductive value. The sublethal doses also increased the mean generation time, total preovipositional period, and duration of the larval and nymphal stages. The intrinsic rate of increase dropped from 0.252/day in the control to 0.222 and 0.208/day in response to LC 10 and LC 25 treatments, respectively. Following LC 10 and LC 25 treatments, the net reproductive rate dropped from 60.65 offspring/individual in the control to 45.19 and 40.81, respectively. These laboratory results indicate that sublethal concentrations of bifenthrin may decrease the developmental rate of T. urticae, are unlikely to result in the resurgence of T. urtciae populations, and might therefore be useful in the integrated management of this pest.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effects of sublethal concentrations of bifenthrin on the two-spotted spider mite, Tetranychus urticae (Acari: Tetranychidae)

Wang

Tang²,

Wang³

et al. 2014

Systematic and Applied Acarology

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“…This experiment was replicated three times for each concentration, separately. The control treatment was only with distilled water (Abedi et al, 2014).…”

Section: Effect Of Sublethal Concentrations On the Adults Of H Hebetormentioning

confidence: 99%

“…The results of these researchers are similar to the results of the present study, and the numerical differences in the data are related to the test conditions and insecticide concentrations. Abedi et al (2014) evaluated the sublethal effects of azadirachtin and cypermethrin insecticide and the adult wasps were exposed to the LC 30 concentration of the insecticides, and then demographic parameters of the surviving wasps were determined. Fecundity, fertility, and parameters including the intrinsic rate of increase (r m ) were affected negatively.…”

Section: Rafieementioning

confidence: 99%

The effect of sublethal concentrations of malathion on some biological parameters of the ectoparasitoid wasp, Habrobracon hebetor (Say, 1836)

Asadi

Karimi

Abbasipour

2018

AAS

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The ectoparasitoid wasp, Habrobracon hebetor (Say, 1836) (Hym.: Braconidae) is one of the most important natural enemies of many pests in Iran. In this study, the effects of sublethal concentrations of malathion (LC 10 and LC 25 ) on biological parameters of the adult wasp including parasitism percentage, male production and longevity of the parasitoid in different growth stages (larvae, pupae and adult) were investigated. The experiments were conducted at 26 ± 1 °C, 60 ± 5 % RH, and 16L:8D h photoperiods. The effect of sublethal concentrations of malathion on adults was determined by exposure of wasp to insecticide, and in the case of larvae and pupae, immersion method was used. Based on the results, with the increase of toxic dose, the percentage of parasitism in adult decreased from 95.6 5% to 87.78 %, compared to the control treatment. Male production increased from 22.73 % in control to 56.38 % at LC 25 concentration. Also, the percentage of parasitism of the malathion-impregnated wasp larvae decreased from 87.78 to 22.92%, compared to the control treatment. Male production from 30.94 % in the control increased to 39.63 % at the LC 25 concentration. In addition, the percentage of parasitism in the wasp pupae impregnated with malathion was reduced from 93.33 to 88.89 %, respectively. Male production increased from 22.98 in the control to 37.23 % in the LC 25 concentration. The data showed that pupae were more susceptible to sublethal concentrations than the larvae. IZVLEČEKUČINEK SUBLETALNIH KONCENTRACIJ MALATIONA NA NEKATERE BIOLOŠKE PARAMETRE EKTOPARAZITSKE OSICE Habrobracon hebetor (Say, 1836) Ektoparazitska osica Habrobracon hebetor (Say, 1836), (Hymenoptera: Braconidae) je eden izmed najpomembnejših naravnih sovražnikov mnogih škodljivih žuželk v Iranu. V raziskavi so bili preučevani učinki subletalnih koncentracij malationa (LC 10 in LC 25 ) na biološke parametre odraslih osic vključno z odstotkom parazitiranja, razvojem samcev in življenjsko dobo parazitoida v različnih razvojnih štadijih (ličinke, bube in imagi). Poskus je bil izveden pri 26 ± 1 °C, 60 ± 5 % RH in osvetlitvi 6 : 8 dan/noč. Učinek subletalnih koncentracij malationa na image je bil določen z izpostavitvijo osic insekticidu, v primeru ličink in bub je bila uporabljena metoda potapljanja. Rezultati so pokazali, da je z naraščanjem koncentracije insekticida odstotek parazitiranja upadel iz 95,65 % na 87,78 % v primerjavi s kontrolo. Razvoj samcev se je iz 22,73 % v kontroli povečal na 56,38 % pri koncentraciji LC 25 . Tudi odstotek parazitiranja z malationom impregniranih ličink osic se je zmanjšal iz 87,78 % na 22,92 % v primerjavi s kontrolo. Razvoj samcev se je iz 30,94 % v kontroli povečal na 39,63 % pri koncentraciji LC 25 . Dodatno se je odstotek parazitiranja bub impregniranih z malationom zmanjšal iz 93,33 na 88,89 %. Razvoj samcev se je povečal iz 22.98 v kontroli na 37,23 % pri koncentraciji LC 25 . Podatki so pokazali, da so bile bube bolj občutljive na subletalne koncentracije kot ličinke. Ključne besede: malation; subletalna k...

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“…Diversos trabajos han mostrado y evidenciado el efecto de los insecticidas convencionales (piretroides, organofosforados) comparados con los biorracionales, aseverando la toxicidad de los convencionales sobre todo en estados adultos tanto de parasitoides como depredadores (Ferrero et al 2000;Bayram et al 2010;Liu et al 2012;Wang et al 2012;Francesena 2008;Gholamzadeh Chitgar et al 2014;Abedi et al 2014). Para ser utilizados en programas de MIP es necesario determinar los efectos letales y subletales de estos insecticidas biorracionales hacia los EN.…”

Section: Introductionunclassified

Selectividad de insecticidas biorracionales hacia Pseudapanteles dignus (Hymenoptera: Braconidae), parasitoide de Tuta absoluta (Lepidoptera: Gelechiidae)

Ferraris¹

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La avispa endoparásita Pseudapanteles dignus (Hymenoptera: Braconidae) es un importante enemigo natural de la plaga clave del tomate, Tuta absoluta (Lepidoptera: Gelechiidae), en el Cinturón Hortícola de La Plata (provincia de Buenos Aires). Los daños causados por la plaga pueden llegar hasta el 80% si no se toman los recaudos necesarios. Para su control se utilizan insecticidas altamente tóxicos que generan contaminación ambiental, perjudican la presencia de los EN y promueven la generación de resistencia. Los insecticidas denominados biorracionales, constituyen una buena alternativa para el control por su modo de acción más específico hacia las plagas y más selectivo hacia los EN, resultando adecuados a las premisas del manejo integrado de plagas. En la actualidad hay evidencias de que algunos de estos productos generan efectos nocivos y que su acción sobre los controladores biológicos es muy variable. Por lo tanto, resulta indispensable su evaluación sobre P. dignus. El objetivo de esta tesis fue determinar la toxicidad de cinco insecticidas biorracionales (clorantraniliprol, benzoato de emamectina, acetamiprid, metaflumizona y azadiractina) utilizados para el control de la plaga, aplicados en sus máximas concentraciones, con dos métodos de exposición y en dos etapas de la vida de P. dignus: pupas (estado protegido; tópico) y adulto (estado desprotegido; ingestión). Acetamiprid causó una toxicidad elevada en ambos estadios mientras que clorantraniliprol resultó de baja toxicidad para ambos estadios evaluados. El resto de los insecticidas presentaron valores de toxicidad medios, destacándose azadiractina por su acción altamente negativa sobre las variables reproductivas evaluadas. Este estudio permitió detectar diferencias de impacto de los insecticidas sobre el parasitoide y se pudo determinar la opción más recomendable, previa evaluación a campo, para ser utilizada en manejos conservacionistas del control natural o en conjunto con agentes de control biológico, aplicados en programas de manejo integrado de plagas.

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Lethal and Sublethal Effects of Azadirachtin and Cypermethrin on <I>Habrobracon hebetor</I> (Hymenoptera: Braconidae)

Cited by 33 publications

References 41 publications

<strong>Effects of sublethal concentrations of bifenthrin on the two-spotted spider mite, <em>Tetranychus urticae</em> (Acari: Tetranychidae)</strong>

<strong>Effects of sublethal concentrations of bifenthrin on the two-spotted spider mite, <em>Tetranychus urticae</em> (Acari: Tetranychidae)</strong>

The effect of sublethal concentrations of malathion on some biological parameters of the ectoparasitoid wasp, Habrobracon hebetor (Say, 1836)

Selectividad de insecticidas biorracionales hacia <i>Pseudapanteles dignus</i> (Hymenoptera: Braconidae), parasitoide de <i>Tuta absoluta</i> (Lepidoptera: Gelechiidae)

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