scholarly journals Efficacy of aqueous leaf extracts and synthetic insecticide on pod-sucking bugs infestation of cowpea (Vigna unguiculata (L.) Walp) in the Guinea Sa-vanna Region of Nigeria

2013 ◽  
Vol 01 (02) ◽  
pp. 10-14 ◽  
Author(s):  
Michael M. Degri ◽  
Duna M. Mailafiya ◽  
Joshua W. Wabekwa
Keyword(s):  
Vigna Unguiculata ◽  
Leaf Extracts ◽  
Synthetic Insecticide ◽  
Pod Sucking Bugs

scholarly journals Evaluation of the efficacy of protectants against cowpea bruchids (Callosobruchus maculatus (F.)) on cowpea seeds (Vigna unguiculata (L.) Walp.)

2008 ◽  
Vol 43 (No. 2) ◽  
pp. 68-72 ◽  
Author(s):  
B.G. Swella ◽  
D.M.K. Mushobozy
Keyword(s):  
Laboratory Experiment ◽  
Vigna Unguiculata ◽  
Callosobruchus Maculatus ◽  
Coconut Oil ◽  
Black Pepper ◽  
Synthetic Insecticide ◽  
Cowpea Seeds ◽  
Good Potential ◽  
Pepper Powder ◽  
Black Pepper Powder

A laboratory experiment of a completely randomised design and replicated four times evaluated the effectiveness to control the bruchid, <i>Callosobruchus maculatus</i> in cowpea by the synthetic insecticide Actellic dust, and by the natural protectants ash, coconut oil, powdered cloves and black pepper. The data collected included the number of damaged and undamaged seeds, weight of damaged and undamaged seeds and the number of live and dead bruchids. Seeds treated with Actellic dust and black pepper powder had significantly low percentages of damaged seeds. Black pepper powder and coconut oil showed good potential in protecting cowpea against bruchid damage.

Observations on Insect Infestation and Damage in Cowpea (Vigna Unguiculata) Intercropped With Tomato (Lycopersicon Esculentum) in a Rain Forest Area of Nigeria

1991 ◽  
Vol 27 (4) ◽  
pp. 407-412 ◽  
Author(s):  
T. I. Ofuya
Keyword(s):  
Lycopersicon Esculentum ◽  
Seed Yield ◽  
Vigna Unguiculata ◽  
Rain Forest ◽  
Heliothis Armigera ◽  
Maruca Testulalis ◽  
Insect Infestation ◽  
Pod Sucking Bugs ◽  
Empoasca Dolichi ◽  
Ootheca Mutabilis

SUMMARYInsect infestation and damage in cowpea (Vigna unguiculala), planted sole or intercropped with tomato (Lycopersicon esculentum) was monitored in 1987 and 1988 in Akure, Nigeria. Infestation of cowpea byEmpoasca dolichiwas significantly reduced by intercropping with tomato in both years, except in the early season of 1988. Infestation of cowpea byOotheca mutabilis, Aphis craccivora, Megalurothrips sjosledti and Maruca testulaliswas not affected by intercropping with tomato in either year. Damage by pod-sucking bugs and Heliothis armigera was significantly higher in sole cowpea than in cowpea intercropped with tomato, in both years. Sole cowpea had a significantly lower seed yield than cowpea intercropped with tomato.Observaciones en cuanto a la infestación de insectos y daños en el caupí(Vigna unguiculata)sembrado en forma simultánea con tomate(Lycopersicon esculentum)en una zona de bosque tropical en Nigeria

scholarly journals EFFICACY OF CLERODENDRUM INFORTUNATUM AND CHROMOLAENA ODORATA ON CARBOHYDRATE CONTENT IN HAEMOLYMPH OF THE SIXTH INSTAR LARVAE OF ORTHAGA EXVINACEA HAMPSON

2020 ◽  
Vol 5 (4) ◽  
pp. 62-68
Author(s):  
Jagadeesh Nambiar ◽  
K.R. Ranjini
Keyword(s):  
Quantitative Estimation ◽  
Botanical Insecticides ◽  
Chromolaena Odorata ◽  
Leaf Extracts ◽  
Quick Method ◽  
Lethal Effects ◽  
Synthetic Insecticide ◽  
Carbohydrate Concentration ◽  
Mango Leaves ◽  
The Impact

Orthaga exvinacea is one of the major pests of mango crop and the caterpillars defoliate the leaves and thereby reduce the crop yield. Use of synthetic insecticide is the quick method for the control this pest but its uncontrolled usage has resulted in serious lethal effects on non-target organisms and environmental pollution. Botanical insecticides are very effective, safe and ecologically acceptable. In the present study, the impact of methanolic leaf extracts of Clerodendrum infortunatum and Chromolaena odorata on carbohydrate concentration in the haemolymph of sixth instar larvae of O. exvinacea was studied under laboratory conditions. The different concentrations (1% to 5%) of each botanical treated mango leaves were fed to the sixth instar. After 48 hours, larvae were sacrificed to collect haemolymph and the quantitative estimation of carbohydrate has been done. The results showed that there was some noticeable decrease in the amount of carbohydrate in the treated larvae when compared to control. The decrease in level of carbohydrate concentration was correlated with the increase in concentration of botanicals. Among the botanicals tested C. odorata possessed more efficacy than that of C. infortunatum and this experiment reveals the potency of both botanicals to be used as natural biopesticides against this pest.

scholarly journals Evaluation of soursop (Annona muricata L) leaf extract on the control of fleabeetles (Podagrica spp.) and yield of okra (Abelsmoschus esculentus L. Moench)

2020 ◽  
Vol 17 (2) ◽  
pp. 21-33
Author(s):  
H.C. Ogbuehi ◽  
M.O. Onuh
Keyword(s):  
Leaf Extract ◽  
Block Design ◽  
Environmentally Friendly ◽  
Cost Effective ◽  
Maturity Stage ◽  
State University ◽  
Annona Muricata ◽  
Fresh Weight ◽  
Leaf Extracts ◽  
Synthetic Insecticide

The study was carried out to find the effect of different concentrations of Soursop (Annona muricata L) leaf extract on control of Podagrica spp. and  yield of okra plant (Abelnusclus esculentus (L. Moench.), at the Teaching and Research Farm at Imo State University, Owerri. The experiment was laid out in a randomized completely block design (RCBD) with five treatment levels and four replications. The treatment levels were 0% control(T1), diluted ethanol(T2), 25%concentration(T3), 50%concentration(T4) and 75%concentration(T5) leaf extracts of Annona muricata. Application of these treatments were done weekly and data were collected on number of Podagrica spp., number of damaged leaves, number of infested plants. Results indicate that the application of 75% leaf extract effectively reduced the number of (0.5) Podagrica spp. at maturity stage which was significantly different (p<0.05) from control (9.5). Higher Yield, (248.59kg/ha), mean number of fruits (35.75) and mean fresh weight (43.732g) were significantly recorded from higher dose (75%) of leaf extract of Annona muricata. Number of damaged leaves, number of infected plants were reduced  significantly by all the treatments compare to control. The result showed that Annona muricata Leaf extract possess insecticidal potential in controlling this pest hence could be use as alternative to synthetic insecticide because it is environmentally friendly and cost effective Keywords: Annona muricata, Podagrica spp., Okra, Leaf extracts and yield 

scholarly journals Antimicrobial activity of cowpea (Vigna unguiculata) leaf extracts

2005 ◽  
Vol 71 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Q. Kritzinger ◽  
N. Lall ◽  
T.A.S. Aveling ◽  
B.-E. van Wyk
Keyword(s):  
Antimicrobial Activity ◽  
Vigna Unguiculata ◽  
Leaf Extracts
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