Comparative effectiveness of the powders of some underutilized botanicals for the control of Callosobruchus maculatus (Coleoptera: Bruchidae)

Ojo, Durojaye Olanrewaju; Ogunleye, R F

doi:10.1007/bf03356479

Cited by 29 publications

(19 citation statements)

References 13 publications

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“…The results obtained from the experiment showed that the powder of S. longepedunculata particularly the root bark was very potent against C. maculatus causing 71.25% mortality at the rate of 1.0 g / 20 g within 96 h of exposure. Plant powders have been used to suppress the population of storage pests (Ogunleye et al, 2004;Ojo and Ogunleye, 2013). In this study, the observed high mortality recorded on cowpea seeds treated with the root bark may be due to the strong choky odours it produced which could asphyxiate insects by blocking the spiracles (Amusan and Okorie, 2002).…”

Section: Discussionmentioning

confidence: 74%

“…The effect of the powders on oviposition could be due to respiratory impairment which probably affects the process of metabolism and consequently other systems of the body of the insects (Adedire et al, 2011;Ileke et al, 2014). The beetles were unable to move freely within the treated cowpea seeds due to the presence of the powders and this might have affected mating activities and sexual communication (Ojo and Ogunleye, 2013). The resultant reduced adult emergence could be to the fact the C. macualtus lay eggs on the seed coat thus bringing the eggs and larvae in close contact with the plant powders as reported by Adedire and Lajide (2001).…”

Section: Discussionmentioning

confidence: 91%

“…The use of plant powders in the control of stored products insects is an ancient practice (Ileke and Olotuah, 2012;Ojo and Ogunleye, 2013). In this study, the insecticidal activities of the leaf, stem bark and root bark of S. longepedunculata as contact insecticides against C. macualtus infesting cowpea seeds were evaluated.…”

Section: Discussionmentioning

confidence: 99%

“…The continued and intensive usage of these insecticides has produced some undesirable toxic effects on non-target biotic components of the ecosystem (Ojo and Ogunleye, 2013). Other potential difficulties associated with the continuous use of these chemical insecticides include; high cost of procurement, pest resurgence and resistance, poisonous residue accumulation in foods and poor knowledge of application (Ileke and Oni, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Currently, research efforts are focused on the use of botanical products as alternatives to synthetic insecticides. These plant products which include ashes, plant powders, extracts and oils have been confirmed to be cheaper, safe, and eco-friendly (Adedire et al, 2011;Ojo and Ogunleye, 2013). There is no doubt that botanical insecticides are an interesting alternative to insect pest control, and on the other hand only a few of the more than 250,000 plant species on our planet have been properly evaluated for this purpose (Khalequzzaman and Osman Goni, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Effectiveness of the Powders of Securidaca longepedunculata (Fres.) as Bioinsecticides against Cowpea Beetle, Callosobruchus maculatus (Fab.) (Coleoptera : Chrysomelidae)

Ojo

Omotoso²,

Obembe³

2018

ijh

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Insect pests cause a great deal of post-harvest losses of stored food products worldwide and especially in the tropics where food products are usually susceptible to attack by insects between the periods of harvest, storage and consumption. In the present study, powders obtained from different parts of Securidaca longepedunculata (Fres.) (leaf. Stem bark and root bark) were tested against the cowpea beetle, Callosobruchus maculatus in the laboratory at ambient tropical conditions of temperature and relative humidity. The powders were applied at 0.0 (control), 0.2, 0.4. 0.6. 0.8 and 1.0 g. Insect mortality was observed for four (days). The result obtained showed that mortality of the insect increased with increased in concentration and exposure time. The powder obtained from the root bark recorded the highest insect mortality of 71.25 % within 96 h of exposure at the highest dosage of 1.0 g this was followed by the stem bark causing 65 % at the same level of concentration. The LD 50 revealed the root bark powder to be the most effective as 3.17 % was required to obtain 50% insect mortality within 96 h of application as reflected by the regression probit analysis. The least toxic powder on C. maculatus was leaf powder. It was also observed that the tested powders significantly (P<0.05) reduced oviposition and percentage adult emergence when compared with the control. The results obtained from this research work showed that root bark of S. longepedunculata contains components of higher toxicity potential.

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Section: Discussionmentioning

confidence: 74%

Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%