A comparison of effectiveness of plant-based and synthetic insecticides in the field management of pod and storage pests of cowpea

Kawuki, Robert; Agona, A.; Nampala, P.; Adipala, E.

doi:10.1016/j.cropro.2004.09.017

Cited by 30 publications

(19 citation statements)

References 5 publications

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“…(Fabaceae) were as efficacious as the synthetic insecticides, Cypermethrin ® and Fenitrothion ® in reducing emergence of bruchid beetle, Callosobruchus sp. [24] Similarly, in Nigeria, extracts of garlic, Allium sativum (Asparagales: Amaryllidaceae) chili pepper, ginger, Zingiber officinale (Zingiberales: Zingiberaceae) neem, Azadirachta indica (Sapindales: Meliaceae) tobacco and sweetsop, Annona squamosa (Magnoliales: Annonaceae) have been successfully used to control pests of cowpea [25]. In Ghana, crude leaf and seed extracts of neem tree have been used extensively in managing pests of crops such as cabbage, lettuce and cowpea [4,9].…”

Section: Introductionmentioning

confidence: 99%

Tri-Trophic Insecticidal Effects of African Plants against Cabbage Pests

et al. 2013

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Botanical insecticides are increasingly attracting research attention as they offer novel modes of action that may provide effective control of pests that have already developed resistance to conventional insecticides. They potentially offer cost-effective pest control to smallholder farmers in developing countries if highly active extracts can be prepared simply from readily available plants. Field cage and open field experiments were conducted to evaluate the insecticidal potential of nine common Ghanaian plants: goat weed, Ageratum conyzoides (Asteraceae), Siam weed, Chromolaena odorata (Asteraceae), Cinderella weed, Synedrella nodiflora (Asteraceae), chili pepper, Capsicum frutescens (Solanaceae), tobacco, Nicotiana tabacum (Solanaceae) cassia, Cassia sophera (Leguminosae), physic nut, Jatropha curcas (Euphorbiaceae), castor oil plant, Ricinus communis (Euphorbiaceae) and basil, Ocimum gratissimum (Lamiaceae). In field cage experiments, simple detergent and water extracts of all botanical treatments gave control of cabbage aphid, Brevicoryne brassicae and diamondback moth, Plutella xylostella, equivalent to the synthetic insecticide Attack® (emamectin benzoate) and superior to water or detergent solution. In open field experiments in the major and minor rainy seasons using a sub-set of plant extracts (A. conyzoides, C. odorata, S. nodiflora, N. tabacum and R. communis), all controlled B. brassicae and P. xylostella more effectively than water control and comparably with or better than Attack®. Botanical and water control treatments were more benign to third trophic level predators than Attack®. Effects cascaded to the first trophic level with all botanical treatments giving cabbage head weights, comparable to Attack® in the minor season. In the major season, R. communis and A conyzoides treatment gave lower head yields than Attack® but the remaining botanicals were equivalent or superior to this synthetic insecticide. Simply-prepared extracts from readily-available Ghanaian plants give beneficial, tri-trophic benefits and merit further research as an inexpensive plant protection strategy for smallholder farmers in West Africa.

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Section: Introductionmentioning

confidence: 99%

Tri-Trophic Insecticidal Effects of African Plants against Cabbage Pests

et al. 2013

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“…A field trial in Uganda revealed that treatment of the crop in the field with crude aqueous extracts of local plants (tobacco = Nicotiana , rotenone = Tephrosia and marigold = Tagetes ) were equally efficacious to cypermethrin or fenitrothion in reducing emergence of bruchid beetles ( Callosobruchus spp.) from cowpeas in storage 11. A subsequent study by the same investigators found that rotating sprays of tobacco extract (three applications) and cypermethrin (two applications) on cowpea generated greater economic return than five sprays of either the extract or cypermethrin 12.…”

Section: Less Developed (‘Poor’) Countriesmentioning

confidence: 99%

Botanical insecticides: for richer, for poorer

Isman¹

2007

Pest Management Science

489

289

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Botanical insecticides presently play only a minor role in insect pest management and crop protection; increasingly stringent regulatory requirements in many jurisdictions have prevented all but a handful of botanical products from reaching the marketplace in North America and Europe in the past 20 years. Nonetheless, the regulatory environment and public health needs are creating opportunities for the use of botanicals in industrialized countries in situations where human and animal health are foremost--for pest control in and around homes and gardens, in commercial kitchens and food storage facilities and on companion animals. Botanicals may also find favour in organic food production, both in the field and in controlled environments. In this review it is argued that the greatest benefits from botanicals might be achieved in developing countries, where human pesticide poisonings are most prevalent. Recent studies in Africa suggest that extracts of locally available plants can be effective as crop protectants, either used alone or in mixtures with conventional insecticides at reduced rates. These studies suggest that indigenous knowledge and traditional practice can make valuable contributions to domestic food production in countries where strict enforcement of pesticide regulations is impractical.

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“…tabacum showed similar effectiveness to the synthetic insecticides against a bruchid beetle ( Callosobruchus sp.) [37]. Nevertheless, plant extracts can be harmful to other beneficials: N .…”

Section: Discussionmentioning

confidence: 99%

Extract of Nicotiana tabacum as a potential control agent of Grapholita molesta (Lepidoptera: Tortricidae)

Sarker

Lim

2018

PLoS ONE

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Oriental fruit moth, Grapholita molesta (Busck) (Lepidoptera: Tortricidae), is an important pest of stone and pome fruits. Growers usually depend on chemical insecticides to control this pest, but demand for more environmentally-friendly means of controlling pests is increasing. At least 91 plant extracts have been reported to be effective against other lepidopterans, but their acute toxicity against G. molesta has rarely been studied. Among these 91 materials, we assessed the residual toxicity of 32 extracts against first instar larvae (< 5 h old) of G. molesta in the laboratory. Nicotiana tabacum L., used at the concentration of 2 mg/ml, showed the highest corrected mortality (92.0%) with a lethal time (LT50) value of 12.9 h. The extract was followed in its efficacy by Allium sativum L. (88.0%), Zanthoxylum piperitum (L.) De Candolle (70.0%), and Sapindus mukorossi Gaertner (65.0%), when mortality was assessed at 20 h after exposure. Against adult fruit moths (< 5 d old), N. tabacum also showed the highest corrected mortality among tested extracts, being 85 and 100% in adult females and males, respectively, at 168 h after exposure. However, there was no synergistic effect of the combined application of any of the top four extracts in either laboratory or greenhouse assays. Oviposition by G. molesta on peach twigs was reduced 85–90% when N. tabacum was applied at 4 ml/ twig compared to control (methanol), demonstrating that N. tabacum may have potential for use as a botanical insecticide against G. molesta.

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A comparison of effectiveness of plant-based and synthetic insecticides in the field management of pod and storage pests of cowpea

Cited by 30 publications

References 5 publications

Tri-Trophic Insecticidal Effects of African Plants against Cabbage Pests

Tri-Trophic Insecticidal Effects of African Plants against Cabbage Pests

Botanical insecticides: for richer, for poorer

Extract of Nicotiana tabacum as a potential control agent of Grapholita molesta (Lepidoptera: Tortricidae)

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