Lutte contre les insectes phytophages par les plantes aromatiques et leurs molécules allélochimiques

Régnault-Roger, Catherine; Hamraoui, Abdelaziz

doi:10.1080/12538078.1997.10515779

Cited by 15 publications

(21 citation statements)

References 14 publications

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“…However, with the new technologies currently available it is possible to increase their residual efficacy. The active products can be encapsulated, used with polymer resins or synergised by other compound like vanillin [27, 30]. However, this rapid decrease of efficacy cannot explain the lack of efficiency of the compound in tunnel tests.…”

Section: Discussionmentioning

confidence: 99%

Electrophysiological and behavioral characterization of bioactive compounds of the Thymus vulgaris, Cymbopogon winterianus, Cuminum cyminum and Cinnamomum zeylanicum essential oils against Anopheles gambiae and prospects for their use as bednet treatments

et al. 2015

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BackgroundLaboratory and field studies showed that repellent, irritant and toxic actions of common public health insecticides reduce human-vector contact and thereby interrupt disease transmission. One of the more effective strategies to reduce disease risk involves the use of long-lasting treated bednets. However, development of insecticide resistance in mosquito populations makes it imperative to find alternatives to these insecticides. Our previous study identified four essential oils as alternatives to pyrethroids: Thymus vulgaris, Cymbopogon winterianus, Cuminum cyminum, Cinnamomum zeylanicum. The objectives of this study were to identify active compounds of these essential oils, to characterize their biological activity, and to examine their potential as a treatment for bednets.MethodsWe evaluated the electrophysiological, behavioural (repellency, irritancy) and toxic effects of the major compounds of these oils against Anopheles gambiae strain ‘Kisumu’.ResultsAldehydes elicited the strongest responses and monoterpenes the weakest responses in electroantennogram (EAG) trials. However, EAG responses did not correlate consistently with results of behavioral assays. In behavioral and toxicity studies, several of the single compounds did exhibit repellency, irritancy or toxicity in An. gambiae; however, the activity of essential oils did not always correlate with activity expected from the major components. On the contrary, the biological activity of essential oils appeared complex, suggesting interactions between individual compounds and the insect under study. Data also indicated that the three effects appeared independent, suggesting that repellency mechanism(s) may differ from mechanisms of irritancy and toxicity.ConclusionsBased on the bioassays reported here, some of the compounds merit consideration as alternative bednet treatments.

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Section: Discussionmentioning

confidence: 99%

Electrophysiological and behavioral characterization of bioactive compounds of the Thymus vulgaris, Cymbopogon winterianus, Cuminum cyminum and Cinnamomum zeylanicum essential oils against Anopheles gambiae and prospects for their use as bednet treatments

et al. 2015

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“…The insecticidal effects of the three plants studied were due to their aromatic odors. Indeed, ethnobotanical observations have shown that there is a traditional practice in the south-west of France for the protection of leguminous seeds by odorous plants (Regnault-Roger and Hamraoui, 2013). The effectiveness of this method was evaluated in the laboratory.…”

Section: Evaluation Of the Germination Rate Of The Stored Seeds Aftermentioning

confidence: 99%

“…The effectiveness of this method was evaluated in the laboratory. The insecticidal activity of aromatic plants is exerted on two levels: a lethal effect on adult populations and an inhibition of reproduction (Regnault-Roger and Hamraoui, 2013). According to the same authors, aromatic plants harbor within them a true molecular arsenal of insecticidal or insect repellent substances capable of inducing plant protection.…”

Section: Evaluation Of the Germination Rate Of The Stored Seeds Aftermentioning

confidence: 99%

Bio-insecticide potential of three aromatic plants of Burkina Faso (<I>Ocimum americanum L., Cymbopogon schoenanthus L. and Hyptis suaveolens</I> Poit.) and their importance in cowpea seed conservation

Savadogo¹,

Lykke²,

Traoré³

et al. 2020

Int. J. Bio. Chem. Sci

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Cowpea is an important source of food and income for the populations of sub-Saharan Africa in general and particularly in West Africa. However, farmers face storage and conservation problems. During storage in granaries, cowpea seeds are attacked by insects causing decreased grain weight and quality and sometimes a loss of germination capacity. Traditionally, farmers have used aromatic plants to limit insect damage. The aim of the present study is to test the insecticidal potential of three aromatic plants (Ocimum americanum L., Cymbopogon schoenanthus L. and Hyptis suaveolens Poit.). Cowpea seeds were mixed with increasing amounts of powder from each of the three plants and stored in plastic boxes for 10 month. The results showed that the number of defective seeds varied according to the treatment. O. americanum was the most efficient; the smallest effective dose of powder was 12%. For C. schoenanthus and H. suaveolens, the smallest effective doses were 16% and 18% respectively. With such treatments, no defective seeds and no live or dead weevils were found. Considering all treatments, the cowpea average loss recorded was 6.92 g for O. americanum, 29.46 g for C. schoenanthus and 36.40 g for H. suaveolens. The average loss recorded in the control was 82.23 g. The powders of the three plants had virtually no effect on the seed germination rate after storage. Storage of cowpeas can be considerably improved using all three aromatic species, but O. americanum was the most efficient. Keywords: Africa, insect damage, cowpea, storage, aromatic plants, powder.

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“…). Also, the chickpea weevil Callosobruchus maculatus may infest the plant Cicer arietinum in fields and stocks; in addition, it infects other leguminous nonhost plants which have an economic importance in developing countries as cowpea ( Vigna unguiculata ) and sap ( Vicia faba ) (Regnault and Hamraoui ).…”

Section: Introductionmentioning

confidence: 99%

Efficacy of Crude and Purified Chitinases (SsChi50) Extracted from Offal Red Scorpion Fish in Biological Control of Chickpea Weevil (C allosobruchus maculatus L.)

Laribi-Habchi

Biche

Drouiche

et al. 2014

Journal of Food Processing and Preservation

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In the tropical zone, Callosobruchus maculatus (Coléoptere: Bruchidae) is one of the most important pests of seeds of chickpea (Cicer arietinum). The infestation starts in the fields and continues in the stocks where the damage can be considerable in the absence of any protective measures. The importance of this damage justifies the development of appropriate control methods. In the context of biological control as an alternative to chemical control, the crude and purified chitinases SsChi50 extracted from the red scorpion fish offal were tested for their possible role as insecticide on the stored-product insect Ca. maculatus at various doses, respectively (3, 6, 9, 12, 15, 18, 21 and 24%), (1, 1.5, 2, 2.5 and 3%). The biotests were conducted in laboratory conditions (temperature and relative humidity) maintained at 28C and 75%, respectively. The results showed that the crude and purified chitinases (SsChi50) tested possess insecticidal activity against Ca. maculatus. The crude and purified chitinases at doses of 24 and 3%, respectively, exhibited great biocidal power against insects as we experienced 100% mortality after only 1 h of exposure to treatment. The 50% lethal dose (LD) at each time of exposure was estimated. This allows us to move forward so that the crude and purified chitinases extracted from the red scorpion fish offal tested can be used as bioinsecticide for the control of Ca. maculatus populations of pests of stored foodstuffs. PRACTICAL APPLICATIONSWe develop a novel bioinsecticide which consists of crude and purified chitinases extracted from fish offal (scorpion fish). The biotests conducted in laboratory conditions revealed that this crude and purified chitinases extract has 100% insecticide activity after 1 h contact at doses of 24 and 3%, respectively. The originality of this work therefore lies in the fact that there are no studies on the use of chitinases extracted from marine biomass as bioinsecticide.

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Lutte contre les insectes phytophages par les plantes aromatiques et leurs molécules allélochimiques

Cited by 15 publications

References 14 publications

Electrophysiological and behavioral characterization of bioactive compounds of the Thymus vulgaris, Cymbopogon winterianus, Cuminum cyminum and Cinnamomum zeylanicum essential oils against Anopheles gambiae and prospects for their use as bednet treatments

Electrophysiological and behavioral characterization of bioactive compounds of the Thymus vulgaris, Cymbopogon winterianus, Cuminum cyminum and Cinnamomum zeylanicum essential oils against Anopheles gambiae and prospects for their use as bednet treatments

Bio-insecticide potential of three aromatic plants of Burkina Faso (<I>Ocimum americanum L., Cymbopogon schoenanthus L. and Hyptis suaveolens</I> Poit.) and their importance in cowpea seed conservation

Efficacy of Crude and Purified Chitinases (SsChi50) Extracted from Offal Red Scorpion Fish in Biological Control of Chickpea Weevil (C allosobruchus maculatus L.)

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