Effect of Native Soap on Insect Pests and Grain Yield of Cowpea (Vigna unguiculata (L) Walp) in Asaba and Abraka during the Late Cropping Season in Delta State, Nigeria

Egho, E. O.; Enujeke, E. C.

doi:10.5539/sar.v1n2p275

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Moreover, some studies had a positive effect in controlling other insects. A study suggests that native soap is an effective bio-pesticide against cowpea insect pests [35].…”

Section: Discussionmentioning

confidence: 99%

Untitled

2023

AAS

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Since 2010, Lebanese tomatoes production has been threatened by the tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae). In this context, this study aimed to evaluate the effect of six safe biological treatments (Bacillus thuringiensis, orange essential oil, pepper & garlic extract, pepper extract, garlic extract, and olive soap) in the management of Tuta absoluta on Lebanese tomatoes in organic open field conditions. Plants were treated after the first mines of this pest had appeared on leaves. We then compared the significant ability of six treatments to reduce infestation on leaves and weight loss of tomatoes fruits, in comparison with the untreated control. The results revealed that Bacillus thuringiensis treatment presented the lowest impact on tomato leaf infestation reduction and was the most effective treatment in protecting the tomatoes plants, with least reduction in weight loss of tomatoes fruits. The orange essential oil resulted as the second most effective treatment, followed by pepper and garlic extract mixed with organic olive oil soap, pepper extract mixed with organic olive oil soap, garlic extract mixed with organic olive oil soap, and organic olive oil soap. Therefore, the first two treatments are relatively effective and economically viable to organically control Tuta absoluta.

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“…Moreover, some studies had a positive effect in controlling other insects. A study suggests that native soap is an effective bio-pesticide against cowpea insect pests [35].…”

Section: Discussionmentioning

confidence: 99%

Untitled

2023

AAS

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“…In general, synthetic products have a higher insecticidal power compared to organic products [33]. Several authors [34,35] and [33], have reported the efficacy of cypermethrin on cowpea insect pests. However, the reduction in stem borers density in subplots treated with the aqueous extract of T. peruviana seeds at a concentration of 16.66 g/l, shows the depressant effect of these extracts on maize stem borers [36] in work on the effect of T. peruviana kernels and Mucuna pruriens plants on cassava root scales in the field.…”

Section: Discussionmentioning

confidence: 99%

Field Control of Maize Borers Using Aqueous Seed Extracts of Thevetia Peruviana (Pers.) K. Schum

Mboussi

Nsangou²,

Heu³

et al. 2022

IJPSS

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Aims: In order to find an alternative to chemical control, the insecticidal potential of aqueous extracts of Thevetia peruviana seeds formulated at 16.66 g/l were tested in the field on the maize stalk borer species. Study Design: The factorial design in subdivided plots or "split-plot" with four replicates and two factors studies was used on an area of 250 m2. Place and Duration of Study: The experiment was carried out in a field located in the city of Yaounde, Cameroon where cassava was grown beforehand, between July and October 2021. Methodology: The extracts at 250 g per 15 l of water were tested against a synthetic insecticide Cypercal at 37.5 ml per 5 l of water and an absolute control (untreated) in a four replicate split-plot device. Two maize varieties (V1: CMS 8704; V2: local) and three treatments (T1: control; T2: T. peruviana seed extract; T3: Cypercal 12 EC) were used. The aqueous extract of T. peruviana was applied by spraying on stems, leaves and leaf cones from 5th to 9th weeks after sowing (SAS). Data were recorded on growth parameters, stem borer density, and maize grain yield. Results: The results show that the application of the treatments resulted in a good development of the growth parameters in the two maize varieties used. Two species of borer Busseola fusca and Sesamia calamistis belonging to the order Lepidoptera were identified. The density of maize stalk borers was significantly reduced (T2: 3 borers) in the subplots treated with aqueous extracts compared to the control (T1: 10 borers). Treatment T2 (2.05 t/ha) gave higher grain yield than the control (1.41 t/ha). Conclusion: The aqueous extracts of T. peruviana seeds having thus shown a strong insect repellent potential in the field can therefore be integrated into the framework of biological control that protects the environment and human health.

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