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

Degri, M. M.; Mailafiya, D. M.; Wabekwa, J. W.

doi:10.4236/ae.2013.12003

Cited by 13 publications

(13 citation statements)

References 10 publications

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“…Homemade aqueous extracts based on neem plant material (leaves, seeds, seed cake, and unformulated oil) have been successfully used for the control of blattodean pests (Ibrahim and Demisse 2013), hemipteran pests (Aziz et al 2013;Degri et al 2013;Gupta and Pathak 2009), lepidopteran pests (Abate 2011;Attia et al 2011;Kumar et al 2015;Okrikata et al 2016), and thysanopteran pests (Shiberu et al 2012) in field application (Tables 1 and 2). Out of 8 trials against lepidopteran pests, neem aqueous extracts showed efficacy in 7 trials.…”

Section: Neem (Azadirachta Indica)mentioning

confidence: 99%

“…In field applications, aqueous extracts of Siam weed controlled coleopteran pests (Onunkun 2012), lepidopteran pests (Amoabeng et al 2013(Amoabeng et al , 2014Ezena et al 2016), and hemipteran pests (Amoabeng et al 2013(Amoabeng et al , 2014Degri et al 2013;Ezena et al 2016) (Table 1). Siam weed aqueous extracts were consistently (8 out of 9 instances) superior to negative controls and often comparable (7 out of 11 instances) to positive controls (Table 2).…”

Section: Siam Weed (Chromolaena Odorata)mentioning

confidence: 99%

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Efficacy of homemade botanical insecticides based on traditional knowledge. A review

Dougoud

Toepfer

Bateman

et al. 2019

Agron. Sustain. Dev.

116

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Homemade botanical insecticides are widely used by subsistence and transitional farmers in low-income countries. Their use is often driven by the limited availability or cost of commercial pesticides. Homemade botanical insecticides are often recommended by agricultural extension services and some development organizations. However, this could be questioned because scientific evidence of their efficacy and safety may not be available or accessible. Although botanicals with insecticidal properties have been widely studied, a synthesis focusing specifically on homemade preparations used in realistic field or storage conditions is missing. In this paper, we review efficacy assessments of botanicals used to prepare homemade insecticides. This covers twelve botanicals recommended by national extension partners in 20 countries within the global agricultural Plantwise program. These are as follows: garlic (Allium sativum), neem (Azadirachta indica), chili pepper (Capsicum spp.), Siam weed (Chromolaena odorata), mother of cocoa (Gliricidia sepium), chinaberry (Melia azedarach), moringa (Moringa oleifera), tobacco (Nicotiana tabacum), clove basil (Ocimum gratissimum), tephrosia (Tephrosia vogelii), tree marigold (Tithonia diversifolia), and bitter leaf (Vernonia amygdalina). This review shows that (1) all the selected botanicals contain active ingredients with insecticidal, antifeedant, or repellent properties, and (2) homemade insecticides based on all the selected botanicals have been used with some success to control pests or prevent damage, although efficacy was variable and often lower than the positive controls (synthetic pesticides). Factors affecting the efficacy of homemade botanical insecticide include variation in active ingredient content and concentration in plant material, as well as variation in the preparation process. In conclusion, there is some evidence that homemade botanical insecticides could contribute to reducing losses in food production. Since further research is needed to better understand their variable efficacy and potential health and environmental risks, those who promote the use of homemade botanical insecticides should also communicate those "unknowns" to the farmers who use such products.

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Section: Neem (Azadirachta Indica)mentioning

confidence: 99%

Section: Siam Weed (Chromolaena Odorata)mentioning

confidence: 99%

Efficacy of homemade botanical insecticides based on traditional knowledge. A review

Dougoud

Toepfer

Bateman

et al. 2019

Agron. Sustain. Dev.

116

View full text Add to dashboard Cite

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“…The result therefore indicates that improved tomato varieties tolerate insect pest's infestations during their growth stages than local variety. The higher mean fruit weight and yield recorded under improved tomato varieties indicate that the fruits were not seriously damaged by H.armigera (Degri and Mailafiya, 2013) while lower fruit weight and yield recorded under local variety implies serious damage by due to its H.armigerasusceptibility to the pest. Therefore, farmers using improved tomato varieties along other pest management measures will have a better yield guarantee than those using local variety.…”

Section: Effect Of Helicoverpaarmigera Damage On Tomato Varietiesmentioning

confidence: 99%

“…The higher mean number of damaged fruits recorded on local tomato variety showed that local tomato variety suffered serious damage from the insect pests. Hence the lowest mean number of undamaged fruits/plant (Schuster, 1977a, Faizaet al, 2012, Degri and Mailafiya, 2013. Less damaged fruits recorded under improved tomato variety means less H.armigera damage to the pest.…”

Section: Effect Of Helicoverpaarmigera Damage On Tomato Varietiesmentioning

confidence: 99%

Comparison of Tomato (Lycopersiconlycopersicum Mill) Varieties to Field Insect Pest Infestations.

2017

American Research Journal of Agriculture

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Tomato crop is widely cultivated in Nigeria. It is prone to heavy infestation by several insect pest species which limit its production. Field experiments were conducted at Gombe State Agricultural Development trial farm, Kwadon, Gombe State in 2012 and 2013 rainy seasons. The study was laid out in a randomized complete block design with four improved tomato varieties and one local variety as treatments replicated four times. Different insect pest species were counted and recorded, plant height, mean number of branches, fruits, mean number of holes, damaged and undamaged fruits were recorded. The results indicated that improved tomato varieties Roma VFN, UTC, Leventis, and Ronita (TOM) were less susceptible to insect pest species infestations while local tomato variety was more susceptible to the pests. Improved tomato varieties used for the study had less insect pest species, produced taller plants, more branches and fruits compared to the local variety. The result further showed that improved tomato varieties were less susceptible to Helicoverpaarmigera damage, hence the lower mean number of holes, damaged fruits and higher undamaged fruits compared to the local tomato variety which had higher mean number of holes, damaged fruits and lower undamaged fruits per plant. The use of improved varieties by poor resource tomato farmers will increase tomato production in Nigeria. Tomato farmers in the study area should be advised to adopt the use of improved tomato varieties for cultivation.

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“…Insecticidal properties of neem (Azadirachta indica A. Juss, Meliaceae) have been traditionally used in cultural practices for several thousand years (Philogène et al, 2003;Philogène et al, 2008). Neem compounds cause effects ranging from repellency to toxicity against a wide spectrum of insect pests including Orthoptera, Lepidoptera, Coleoptera, Diptera and Hemiptera (Schmutterer, 1990;Isman, 2006;Siddiqui et al, 2009;Degri et al, 2013;Shannag et al, 2014;Mondédji et al, 2016). These biological properties are mediated by different groups of compounds among which limonoids and particularly azadirachtin mainly present in the neem seeds.…”

Section: Introductionmentioning

confidence: 99%

Effects of neem leaf extracts on Lepidopteran pest species attacking Solanum macrocarpon L. (Solanaceae) in southern Togo

MondÃ©dji¹,

Nyamador²

2019

J. Entomol. Nematol.

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Lepidopteran pests cause considerable damage to Solanum macrocarpon Linnaeus (Solanaceae). Their control by the use of botanical extracts is a promising alternative to improper use of chemical insecticides. The objective of this study was to evaluate the effects of three doses of leaf extract of the neem tree, Azadirachta indica Adrien-Henri de Jussieu (Meliaceae) against Lepidopteran pest species that attack S. macrocarpon L. in southern Togo. The experimental design used for the study was randomized complete blocks with three replicates and five treatments: three doses (N1: 300, N2: 600 and N3: 900 L/ha) of neem leaf aqueous extract, a synthetic insecticide "Cydim Super" (C.S.) and a Control (C) in field. Botanical exctract and synthetic insecticide were applied after Lepidopteran pest species frequency and number collected once a week for 8 weeks. The yield data were obtained by weighing the aerial parts (leaves and stems) of S. macrocarpon harvested. Three species of Lepidoptera (Selepa docilis Butler (Noctuidae), Spoladea recurvalis Fabricius (Crambidae) and Scrobipalpa ergasima Meyrick (Gelechiidae)) were recorded. The neem leaf extract reduced frequency and numbers of all the three species found on S. macrocarpon than Control. S. recurvalis and S. ergasima were not recorded on plots treated with N3: 900 l/ha. No Lepidopteran pest species was recorded on plots treated with synthetic insecticide. S. macrocarpon yields obtained on plots treated with neem leaf extract N1, N2 and N3 were higher (5.42 ± 1.80 t/ha, 7.39 ± 1.88 t/ha and 6.97 ± 0.96 t/ha, respectively) than that of synthetic insecticide which was 3.51 ± 0.72 t/ha.

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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

Cited by 13 publications

References 10 publications

Efficacy of homemade botanical insecticides based on traditional knowledge. A review

Efficacy of homemade botanical insecticides based on traditional knowledge. A review

Comparison of Tomato (Lycopersiconlycopersicum Mill) Varieties to Field Insect Pest Infestations.

Effects of neem leaf extracts on Lepidopteran pest species attacking Solanum macrocarpon L. (Solanaceae) in southern Togo

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