Antifeedant effects of several plant extracts on Colorado potato beetle larvae

Kutas, János; Nádasy, M.

doi:10.1556/aphyt.40.2005.3-4.17

Cited by 12 publications

(7 citation statements)

References 23 publications

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“…The 6‐h time point was selected as the most reliable because most insects were actively feeding at that time, and the time for induction of potentially confounding secondary responses resulting from the applied compound was kept to a minimum. The feeding preference was assessed using the antifeedant index (AI) and compared with the published data for polygodial (AI%) (Kutas and Nádasy, ; Prota et al ., ). The AI% of cinnamolide increased with increasing concentration applied, as seen in Figure , meaning that there was a clear dose‐dependent preference for the control discs over the treated ones, similar to what was observed for polygodial.…”

Section: Resultsmentioning

confidence: 97%

“…To express the repellence potency of cinnamolide towards the two insect species tested, the AI% was calculated according to Kutas and N adasy, as follows: AI% = [(C À T)/(C + T)] 9 100, where C is the number of insects feeding on the control plant and T the number of insects feeding on the treatment plant (Kutas and N adasy, 2005). The AI% assumes positive values when the tested compound is an antifeedant and negative values when the compound is a phagostimulant.…”

Section: Discussionmentioning

confidence: 99%

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Identification of a drimenol synthase and drimenol oxidase from Persicaria hydropiper, involved in the biosynthesis of insect deterrent drimanes

et al. 2017

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SUMMARYThe sesquiterpenoid polygodial, which belongs to the drimane family, has been shown to be an antifeedant for a number of herbivorous insects. It is presumed to be synthesized from farnesyl diphosphate via drimenol, subsequent C-12 hydroxylation and further oxidations at both C-11 and C-12 to form a dialdehyde. Here, we have identified a drimenol synthase (PhDS) and a cytochrome P450 drimenol oxidase (PhDOX1) from Persicaria hydropiper. Expression of PhDS in yeast and plants resulted in production of drimenol alone. Co-expression of PhDS with PhDOX1 in yeast yielded drimendiol, the 12-hydroxylation product of drimenol, as a major product, and cinnamolide. When PhDS and PhDOX1 were transiently expressed by agro-infiltration in Nicotiana benthamiana leaves, drimenol was almost completely converted into cinnamolide and several additional drimenol derivatives were observed. In vitro assays showed that PhDOX1 only catalyses the conversion from drimenol to drimendiol, and not the further oxidation into an aldehyde. In yeast and heterologous plant hosts, the C-12 position of drimendiol is therefore likely to be further oxidized by endogenous enzymes into an aldehyde and subsequently converted to cinnamolide, presumably by spontaneous hemiacetal formation with the C-11 hydroxyl group followed by oxidation. Purified cinnamolide was confirmed by NMR and shown to be deterrent with an effective deterrent dose (ED 50 ) of about 200-400 lg g À1 fresh weight against both whiteflies and aphids. The putative additional physiological and biochemical requirements for polygodial biosynthesis and stable storage in plant tissues are discussed.

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Section: Resultsmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Identification of a drimenol synthase and drimenol oxidase from Persicaria hydropiper, involved in the biosynthesis of insect deterrent drimanes

et al. 2017

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“…where C is the number of insects feeding on the control and T is the number of insects feeding on the treatment. 31 The AI% assumes positive values when the tested compound is an antifeedant, and negative values when the compound is a phagostimulant. A onesample Student's t-test was used to assess whether the attractant or repellent effects of the compounds were significant.…”

Section: Discussionmentioning

confidence: 99%

“…where C is the number of insects feeding on the control and T is the number of insects feeding on the treatment . The AI% assumes positive values when the tested compound is an antifeedant, and negative values when the compound is a phagostimulant.…”

Section: Methodsmentioning

confidence: 99%

Comparative antifeedant activities of polygodial and pyrethrins against whiteflies (Bemisia tabaci) and aphids (Myzus persicae)

Prota¹,

Bouwmeester²,

Jongsma³

2013

Pest Management Science

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“…For this species, BHA and its formulation were not evaluated owing to the high doses required to achieve LD 50 (29 and 65 mM, respectively) (GARCIA et al 2017). Like antifeedant activity, much research has been carried out to evaluate repellent activity against pest insects using essential oils and plant extracts (KUTAS & NÁDASY 2005, KUMAR et al 2007, KHEMIRA et al 2013, KEDIA et al 2014. KHEMIRA et al (2013), observed that 0.08 µl/m 2 of Eucalyptus astringens (MAIDEN) essential oil exhibited a repellent action against Oryzaephilus surinamensis (55%) and Rhyzopertha dominica (FABRICIUS, 1792) (Coleoptera: Bostrichidae) (58.75%) after 24 h of exposure.…”

Section: Discussionmentioning

confidence: 99%

Antifeedant, horizontal transfer and repellent activities of free and microencapsulated food grade antioxidants against postharvest pest insects (Oryzaephilus surinamensis (Linnaeus, 1758) and Tribolium castaneum (Herbst, 1797)) (Coleoptera: Silvanidae, Tenebrionidae) of peanuts (Arachis hypogaea L.) (Fabaceae)

García¹,

Nesci²,

Girardi³

et al. 2019

Polish Journal of Entomology

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The aims of this work were to evaluate antifeedant, horizontal transfer and repellent activities of butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT), free and microencapsulated, at different doses against Oryzaephilus surinamensis and Tribolium castaneum on peanut kernels. In general, negative values for the percentage feeding deterrence index (FDI) were found for Oryzaephilus surinamensis in the presence of these chemical treatments, suggesting a phagostimulant activity. In addition, untreated individuals died within 20 days of coming into contact with insects previously exposed to both antioxidants (BHA and BHT) and formulations (F- BHA and F-BHT), regardless of the dose, while the insects in the controls died after this time. Since this work revealed evidence for the transfer of both free and microencapsulated antioxidants from treated to untreated individuals, we can confirm that horizontal transfer of these compounds takes place between treated and untreated insects. The evaluated compounds showed no repellent activity against O. surinamensis, which continued unaffected with its life cycle on both treated and untreated peanuts. On the other hand, Tribolium castaneum exhibited high FDI values, especially for the formulations, with mean values of 0.68 and 0.91 for F-BHA and F-BHT, respectively. No horizontal transfer was observed for this insect, but repellency was higher than 80% for free and encapsulated BHT. We can conclude that the mechanism of insecticidal action of antioxidants and their formulations was dependent on the type of insect evaluated. The insecticidal effect on Oryzaephilus surinamensis could have been due to the direct intake of the chemical compounds added, whereas the negative effect on Tribolium castaneum could have been caused by starvation.

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Antifeedant effects of several plant extracts on Colorado potato beetle larvae

Cited by 12 publications

References 23 publications

Identification of a drimenol synthase and drimenol oxidase from Persicaria hydropiper, involved in the biosynthesis of insect deterrent drimanes

Identification of a drimenol synthase and drimenol oxidase from Persicaria hydropiper, involved in the biosynthesis of insect deterrent drimanes

Comparative antifeedant activities of polygodial and pyrethrins against whiteflies (Bemisia tabaci) and aphids (Myzus persicae)

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