Evaluation of the bio-insecticidal effects of the main fatty acids of olive oil on Callosobruchus maculatus F. (Coleoptera-Bruchidae) in cowpea (Vigna unguiculata (L.))

Potential exploitation of Bacillus flexus biofilm against the cowpea weevil, Callosobruchus maculatus (F.) (Coleoptera: Bruchidae)

“…A mild significance appeared in the highest concentration (20%), where ESM of isolate no.13 recorded 31.4% larval mortality. Similar results were presented by Aider et al (2016) and De Sá et al (2018) when essential oil treatments and natural seed coats were used. They recorded a low mortality rate in , and statistical treatments were performed using ANOVA for differences comparing means in each concentration separately using Tukey's HSD test.…”

“…This reduction in egg laying on treated cowpea seeds may be due to the coating film of the treated seeds, and its physical mechanism that reduced the adhesion of the eggs to the seed surface. This seed coating films may not constitute a suitable surface for laying eggs as reported by Kellouche and Soltani (2004) and Aider et al (2016). Regarding fecundity, the reduction was not only related to the shortened period of laying eggs or survival of the females, but it could also be a result of disturbances in the vitellogenesis process (Lienard et al, 1993).…”

“…Generally, egg hatching refracts fertility of adult males but undoubtedly can be caused by the embryonic development disturbance (Kellouche and Soltani, 2004). Aider et al (2016) reported that the treatments of seeds with olive oil, 2 fatty acids (oleic acid, and linoleic acid separately), and their mixtures caused a significant reduction in longevity, fecundity, number of hatched eggs, and emergence of C. maculatus. Also, Ajayi et al (2018) estimated that the ethanolic extracts of Zingiber officinale rhizome and Moringa oleifera seeds recorded the highest inhibitory effects on egg laying as well as egg hatching.…”

Effect of acaricidal compound extracted from Arachis hypogaea Linn against Tetranychus cinnabarinus

“…For example, Perumalsamy, Jang, Kim, Kadarkarai, and Ahn (2015) determined the larvicidal activity of palmitic acid identified in Millettia pinnata (Fabaceae) seed towards three mosquito species-Aedes aegypti, Aedes albopictus and Culex pipiens pallens. Aider, Kellouche, Fellag, and Debras (2016) found that a mixture of many fatty acids including palmitic acid showed obvious ovicidal activity against Callosobruchus maculatus F. (Coleoptera-Bruchidae) on cowpea (Vigna unguiculata (L.)). In 2014, palmitic acid was identified as the major component of the ethanolic seed extract of Annona squamosa L., and analyses suggested that this main chemical constituent could explain why the plant extract exhibited antifeeding and repellent effects against the Asian subterranean termite Coptotermes gestroi Wasmann (Isoptera: Rhinotermitidae), which might indicate another source of natural pesticide for use in the control of subterranean termites (Acda, 2014).…”

Analysis of bioactive compounds from the leaves part of Melastoma malabatrichum, Clidemia hirta, Chromolaena odorata, and Ageratum conyzoides by gas chromatography-mass spectrometry

“…Anopheles funestus, the main malaria vector, is toxic to and repellent to both insecticide-resistant and susceptible strains of fatty acids, combination (C8,9,10) [11]. Numerous fatty acids, including oleic acid and undecylenic acid, had insecticidal effects that reduced the life duration of Callosobruchus maculatus adults because of the toxicity of the contact treatments [12]. Additionally, palmitic acid and the 9,12-octadecadienoic acid methyl ester were discovered by Zayed and Samling [13] to have an insecticidal effect.…”