Comparative study on the bionomics of Callosobruchus maculatus Fabricius (Coleoptera: Chrysomelidae) in cowpea varieties (host) and common bean varieties (non-host): Findings revealed important food security information

Nwosu, Luke Chinaru; Ikodie, Gold

doi:10.1007/s42690-021-00449-z

Cited by 2 publications

(1 citation statement)

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“…The cowpea weevil, Callosobruchus maculatus (Fabricius) (Coleoptera: Chrysomelidae), is the damaging field-carry-to storage insect pest of various legumes, such as beans, chickpea, cowpea, lentil, and soybean [ 1 , 2 ]. A female C. maculatus lays more than 100 eggs within its 2- to 3-week life span, and larvae penetrate legume grains, causing weight loss, as well as reduction in seed viability and nutritional quality, making grains unsuitable for marketing, human, and animal consumption [ 3 , 4 ]. The economic injury of C. maculatus can reach 100% in untreated legume grains [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Encapsulation of Eucalyptus largiflorens Essential Oil by Mesoporous Silicates for Effective Control of the Cowpea Weevil, Callosobruchus maculatus (Fabricius) (Coleoptera: Chrysomelidae)

et al. 2022

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Although the use of synthetic chemicals is the principal method for insect pest management, their widespread application has led to numerous side effects, including environmental pollution and threats to human and animal health. Plant essential oils have been introduced as promising natural substitutes for synthetic insecticides. However, high volatility and/or low durability are the main limiting factors for essential oil application for control of insect pests. Accordingly, along with an evaluation of the fumigant toxicity of Eucalyptus largiflorens essential oil against the cowpea weevil, Callosobruchus maculatus, essential oil was nanoencapsulated by two mesoporous silicates, MCM-41 and zeolite 3A, to enhance fumigant persistence and toxicity. The chemical profile of essential oil was also analyzed through gas chromatographic-mass spectrometry. E. largiflorens essential oil showed significant concentration-dependent toxicity against insect pests; a concentration of 5.16 μL/L resulted in 100% mortality after 48 h. The toxicity of essential oil could be attributed to the presence of various insecticidal terpenes, such as spathulenol (15.6%), cryptone (7.0%), and 1,8-cineole (5.8%). Fumigant persistence was increased from 6 days to 19 and 17 days for pure and capsulated essential oil with MCM-41 and Zeolite 3A, respectively. The insect mortality also increased from 99 insects in pure essential oil to 178 and 180 insects in MCM-41 and Zeolite 3A encapsulated formulations, respectively. Therefore, the encapsulation of E. largiflorens essential oil by MCM- 41 and Zeolite 3A is a beneficial method for enhancing its persistence and toxicity against C. maculatus.

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Section: Introductionmentioning

confidence: 99%