The influence of geographic origin and food type on the susceptibility of Callosobruchus maculatus (Fabricius) to Piper guineense (Schum and Thonn)

Oyeniyi, Emmanuel Ayobami; Gbaye, Olajire A.; Holloway, Graham J.

doi:10.1016/j.jspr.2015.05.005

Cited by 19 publications

(22 citation statements)

References 34 publications

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“…The characteristic lower mobility of the soldier termite on wet treated filter paper could have reduced their ability to pick up more plant extracts unlike worker termites and this could be responsible for the observed lower mortality in soldier termite. Highly mobile arthropods in a poisoned environment are known to pick up higher dosage of toxins and also expend greater amount of conserved energy on mobility, thus left with little or no energy to withstand the poison (Oyeniyi, Gbaye, & Holloway, 2015a, 2015b. This could be responsible for the observed higher mortality of the worker termite in this study.…”

Section: Discussionmentioning

confidence: 99%

Synergism of three botanical termiticides as wood protectants against subterranean termites, Macrotermes subhyalinus (Rambur, 1842)

Ajayi

Oyeniyi

Elijah

2020

JoBAZ

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Background: The increased interest in the harmful effects of most chemical pesticides on the ecosystem has continually served as an impetus to search for safer and eco-friendly pesticides from plant origin. In this study, the termiticidal potentials of extract mixtures of Azadirachta indica (A. Juss.), Nicotiana tabacum (L.), and Jatropha curcas (L.) against Macrotermes subhyalinus (Rambur, 1842) infesting Triplochiton scleroxylon (K. Schum) wood blocks were investigated in the field (open and under shade) and laboratory conditions. Weight loss in wood blocks, level of wood damage, and termite mortality were used as indices of wood protection potential of the botanical mixtures. The level of repellent ability of the extracts mixture was also determined. For the laboratory bioassays, ten termites (worker/soldier) were used per treatment and each treatment was replicated thrice. Profile of components of the three mixtures was also obtained using head space-solid-phase micro-extraction, gas chromatography-mass spectrophotometry (HS-SPME, GC-MS) analysis. Results: Extracts of A. indica plus N. tabacum achieved 100% mortality of worker within 4 h while those of N. tabacum plus J. curcas and A. indica plus N. tabacum plus J. curcas achieved 100% mortality of termites at 6 h posttreatment. Also, extract of A. indica plus N. tabacum and A. indica plus N. tabacum plus J. curcas evoked 100% mortality of soldier termites at 6 h. Termites exposed to N. tabacum plus J. curcas for 1, 2, 3, and 4 h were the most repelled at 73, 87, 73, and 73%, respectively. The extract of J. curcas plus A. indica plus N. tabacum offered the highest protection against termite damage in the open field (6.17%). The botanicals were ineffective under shade. Insecticidal compounds like (S)-3-(1-Methyl-2-pyrrolidinyl) pyridine; Methyl ester, Hexadecanoic acid; (Z, Z)-9, 12-Octadecadienoic acid; Anthracene; 2-Hydroxy-Cyclopentadecanone; and n-Hexadecanoic acid were found in the extracts. Conclusion: These results suggest that the botanical mixtures could confer some protection against termites. Also, the knowledge about the components and varied level of potency under different conditions may be vital in developing biorationals against M. subhyalinus.

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Section: Discussionmentioning

confidence: 99%

Synergism of three botanical termiticides as wood protectants against subterranean termites, Macrotermes subhyalinus (Rambur, 1842)

Ajayi

Oyeniyi

Elijah

2020

JoBAZ

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“…The resistance factor of each population was calculated from the lethal concentrations using the expression below: (Modified from Oyeniyi et al, 2015a)…”

Section: Discussionmentioning

confidence: 99%

“…The differences in the resistance factor between insect populations to a particular insecticide have been attributed to several factors. Such factors include: thickness of insect's exoskeleton, type of insecticide being used, the ability of the insect to metabolize a poison, concentration of insecticide used, time of exposure, the type of food eaten by the insect, insect location and species, among other parameters Buhler, 2013;Oyeniyi et al, 2015a;Oyeniyi et al, 2015b). Some of these factors might have contributed to the variations observed in the resistance factor of Bruchid populations sampled in the present study.…”

Section: Discussionmentioning

confidence: 99%

“…Due to the high level of illiteracy among local farmers and post-harvest handlers of cowpea in Nigeria, pesticides are indiscriminately applied for insect pest control. Oyeniyi et al (2015a) opined that mismanagement of any form of insecticide can lead to resistance and loss of efficacy overtime. Insecticidal resistance, due to the failure of most chemicals to control insect pest, has also been implicated in the loss of food worth several billions of dollars globally (Elzen and Hardeen, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Resistance of Callosobruchus Maculatus ( Fabricius ) ( Coleoptera : Bruchidae ) Populations in Nigeria to Dichlorvos

Oyeniyi¹,

Gbaye²,

Ojo³

2016

JJBS

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The resistance status of Nigeria populations of Callosobruchus maculatus (Fab.) to dichlorvos (2,3 -Dichlorovinyl dimethyl phosphate {DDVP}) was investigated in the present study. Bruchids were obtained from five different locations spread across three South-Western states of Nigeria. These include Akure (Ondo state), Ikare-Akoko (Ondo state), Ikere-Ekiti (Ekiti state), Ijan-Ekiti (Ekiti state) and Ibadan (Oyo state). A susceptible laboratory culture of C. maculatus served as the reference population. Bruchid populations were exposed to filter papers impregnated with DDVP (concentration range: 0.00001% -0.01%) and the mortality was assessed after 3, 6, 24 and 48 hours post-treatment. Bruchid mortality varied across locations, DDVP concentration and exposure time. Bruchids obtained from Ibadan required the highest concentration (LC 95 : 185.418 mg ml -1 ) of DDVP, hence they have the highest resistance factor (RF) (RF 95 : 1483.30); while their counterparts from Ijan-Ekiti required the lowest concentration of DDVP (LC 95 : 0.242 mg ml -1 ) with the lowest RF (RF 95 : 1.94). The present study reveals diverse levels of resistance to DDVP in Nigerian populations of C. maculatus.Hence, there is a need for resistance management strategies on the use of DDVP and other organophosphate insecticide in its class across various Nigerian states to minimize cost and health risk implications that could arise from insecticide resistance.

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“…The losses incurred by this weevil to cowpea in storage is reported to reach 100% sometimes, if left unattended, compelling many farmers in Africa, Asia and Southern America to dispose of their crops soon after harvest thus reducing an important protein and income source for their families (Sanon et al, 2010;Ajayi et al, 2015;Oyeniyi et al, 2015). Significant losses in weight, viability, protein content, essential amino acids, total fat, mineral matter, vitamins, soluble sugars, starch digestibility, emulsification, foam and viscosity properties and increase in free fatty acids and peroxides of insect-infested grains were reported (Ojimelukwe et al 1999;Sallam, 2008;Odejayi, et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Comparative effects of three levels of insect infestation on selected properties of five Nigerian cowpea (<i>Vigna unguiculasta (L.</i>) walp) varieties

Akah¹,

Onyeka²

2018

Agro-Sci.

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The influence of geographic origin and food type on the susceptibility of Callosobruchus maculatus (Fabricius) to Piper guineense (Schum and Thonn)

Cited by 19 publications

References 34 publications

Synergism of three botanical termiticides as wood protectants against subterranean termites, Macrotermes subhyalinus (Rambur, 1842)

Synergism of three botanical termiticides as wood protectants against subterranean termites, Macrotermes subhyalinus (Rambur, 1842)

Resistance of Callosobruchus Maculatus ( Fabricius ) ( Coleoptera : Bruchidae ) Populations in Nigeria to Dichlorvos

Comparative effects of three levels of insect infestation on selected properties of five Nigerian cowpea (<i>Vigna unguiculasta (L.</i>) walp) varieties

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