Allium spp thiosulfinates as substitute fumigants for methyl bromide

Auger, Jacques; Cadoux, F; Thibout, É.

doi:10.1002/(sici)1096-9063(199902)55:2<200::aid-ps868>3.3.co;2-c

Cited by 3 publications

(3 citation statements)

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“…In assays in which D. citri entered the olfactometer stage in response to a combination of volatiles from intact guava and citrus, the captured psyllids were found knocked down and appeared dead. It is possible that this effect may be attributed to the neurotoxicity of DMDS (Auger et al 1999; Dugravot et al 2002) or other guava or citrus volatiles. Jackson et al (1996) also reported that aphids exposed to high concentrations of monoterpenes were intoxicated and suggested it was consistent with the hypothesis that monoterpenes inhibit acetylcholinesterase, which is vital for impulse transmission in insects (van Oosten et al 1990).…”

Section: Discussionmentioning

confidence: 99%

Guava leaf volatiles and dimethyl disulphide inhibit response of Diaphorina citri Kuwayama to host plant volatiles

Onagbola

Rouseff

Smoot

et al. 2010

Journal of Applied Entomology

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The Asian citrus psyllid, Diaphorina citri Kuwayama, vectors the causal pathogen of huanglongbing (HLB), which is likely the most important disease affecting worldwide citrus production. Interplanting citrus with guava, Psidium guajava L., was reported to reduce D. citri populations and incidence of HLB. We describe a series of investigations on the response of D. citri to citrus volatiles with and without guava leaf volatiles and to synthetic dimethyl disulphide (DMDS), in laboratory olfactometers and in the field. Volatiles from guava leaves significantly inhibited attraction of D. citri to normally attractive host‐plant (citrus) volatiles. A similar level of inhibition was recorded when synthetic DMDS was co‐released with volatiles from citrus leaves. In addition, the volatile mixture emanating from a combination of intact citrus and intact guava leaves induced a knock‐down effect on adult D. citri. Compounds similar to DMDS including dipropyl disulphide, ethyl‐1‐propyl disulphide, and diethyl disulphide did not affect the behavioural response of D. citri to attractive citrus host plant volatiles. Head‐space volatile analyses were conducted to compare sulphur volatile profiles of citrus and guava, used in our behavioural assays, with a gas chromatography‐pulsed flame photometric detector. DMDS, produced by wounded guava in our olfactometer assays, was not produced by similarly wounded citrus. The airborne concentration of DMDS that induced the behavioural effect in the 4‐choice olfactometer was 107 pg/ml. In a small plot field experiment, populations of D. citri were significantly reduced by deployment of synthetic DMDS from polyethylene vials compared with untreated control plots. Our results verify that guava leaf volatiles inhibit the response of D. citri to citrus host plant volatiles and suggest that the induced compound, DMDS, may be partially responsible for this effect. Also, we show that field deployment of DMDS reduces densities of D. citri and thus may have potential as a novel control strategy.

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Section: Discussionmentioning

confidence: 99%

Guava leaf volatiles and dimethyl disulphide inhibit response of Diaphorina citri Kuwayama to host plant volatiles

Onagbola

Rouseff

Smoot

et al. 2010

Journal of Applied Entomology

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“…This could be attributed to a residual presence of dichloromethane used as PCL solvent in the dispenser production. For this compound, in fact, a strong fumigant toxicity against the granary weevil congener Sitophilus oryzae (L.) has been reported (Auger et al 1999). The toxicity of (E)-2hexenal-loaded dispensers was significantly higher than that of propionic acid-loaded system at the application rates of 1 (t = 2.814; df = 10; P = 0.018), 2 (t = 2.251; df = 10; P = 0.048) and 3 (t = 4.557; df = 10; P = 0.001) dispensers per 5 kg of wheat grains.…”

Section: Fumigant Toxicitymentioning

confidence: 99%

Controlled Release of Propionic Acid and (E )-2-Hexenal Against S itophilus Granarius (L.) (Coleoptera: Curculionidae)

Germinara

Conte

Lecce

et al. 2014

Journal of Food Processing and Preservation

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The purpose of this study was to develop biodegradable devices for controlled delivery of natural fumigants. To this aim, a porous core based on whey protein foam was first loaded with either propionic acid or (E)‐2‐hexenal and then coated with a multilayer of poly‐caprolactone to delay compounds release. The release mechanism of compounds from the matrix system has been explored and described by means of a mathematical model. It was found that the experimental data are satisfactory analyzed using a diffusion‐controlled model, thus calculating all the parameters that control the release. Fumigants’ toxicity highlighted that both compounds investigated in this study are proven candidates to be formulated in sustained release dosage form and have been subjected to thorough investigation for their candidature. Practical Applications Devices assuring a controlled release of propionic acid and (E)‐2‐hexenal can find practical application for the control of insect pests in stored cereal grains. Biodegradable formulations of natural fumigants are particularly interesting for the storage of cereals from organic farming.

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“…While these compounds are toxic for non‐specialist insects, observations have shown that specialist insects can not only develop on, and consume these plants but also use such allelochemicals as behavioral and physiological signals. Allium plant species producing potentially toxic sulfur allelochemicals (Auger et al., 1999) are mainly consumed by specialist insects, which make them good models for studying this type of insect specialization.…”

Section: Introductionmentioning

confidence: 99%

How a specialist and a non‐specialist insect cope with dimethyl disulfide produced by Allium porrum

Dugravot

Thibout

Abo-Ghalia

et al. 2004

Entomologia Exp Applicata

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Damaged Allium plants produce and release sulfur allelochemicals, presumably to prevent insect herbivory. Defensive sulfur compounds, particularly dimethyl disulfide (DMDS), are highly toxic for non-adapted species. The toxicity of DMDS in these insects is due to disruption of the cytochrome oxidase system of their mitochondria. The purpose of this study was to compare susceptibility to DMDS in a specialist and a non-specialist insect of Allium plants, i.e., Acrolepiopsis assectella Zeller (Lepidoptera: Acrolepiidae) and Callosobruchus maculatus Fabricius (Coleoptera: Bruchidae) a specialist insect of Leguminosae. Results showed that A. assectella larvae are less susceptible to DMDS than C. maculatus adults. This bruchid becomes more tolerant after a first exposure to 0.2 µ l l − 1 of DMDS, with second-exposure toxicity depending on the time lapse between exposures. Higher second-exposure tolerance could be due to selection and detoxification. To answer this question, the activity of glutathione S-transferase (GST), a key enzyme in the detoxification system, was analyzed after DMDS exposure of C. maculatus adults and larvae and of A. assectella larvae. Exposure to DMDS increased GST activity in C. maculatus adults and larvae. This finding implies that induced GST is involved in C. maculatus tolerance to DMDS. Exposure to DMDS had no effect on GST activity in A. assectella . Adaptations underlying A. assectella tolerance to sulfur compounds are discussed.

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Allium spp thiosulfinates as substitute fumigants for methyl bromide

Cited by 3 publications

References 0 publications

Guava leaf volatiles and dimethyl disulphide inhibit response of Diaphorina citri Kuwayama to host plant volatiles

Guava leaf volatiles and dimethyl disulphide inhibit response of Diaphorina citri Kuwayama to host plant volatiles

Controlled Release of Propionic Acid and (E )-2-Hexenal Against S itophilus Granarius (L.) (Coleoptera: Curculionidae)

How a specialist and a non‐specialist insect cope with dimethyl disulfide produced by Allium porrum

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