Comparative effects of deltamethrin and Neem kernel solution treatments on Diamondback moth and <i>Cotesia plutellae</i> (Hym., Braconidae) parasitoid populations in the Cotonou peri‐urban area in Benin

Goudegnon, A. Ernest; Kirk, Aa.; Schiffers, Bruno; Bordat, Dominique

doi:10.1046/j.1439-0418.2000.00461.x

Cited by 27 publications

(26 citation statements)

References 10 publications

(12 reference statements)

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“…The 10% NSE treatment gave the bage head yield. These results the findings by Schmutterer (1990), Goudegnon et al (2000) …”

Section: Effect Of Weeding Regime On Insect and S Populationssupporting

confidence: 90%

“…Goudegn (2000) reported that 5% NSE treatment sig lowered populations of the diamondback moth cabbage in Benin. The reductions in populations were probably due to the inse and/or repellent properties of neem (Schm 1990;Goudegnon et al 2000; Populations of the insect pests were greate that were treated with Karate than in the ne treatments, which probably showed that the inse were resistant to karate as was reported for anoth pyrethroid insecticide deltamethrin by Goud al. (2000).…”

Section: Resultsmentioning

confidence: 77%

“…treatment at 5 and 10 % NSE gave a sig better control of all pests compared with the othe treatments, including the pyrethroid inse Karate. Other workers have reported that neem treatments are effective for control of cabbag pests (Goudegnon et al 2000;Javaid et al Obeng-Ofori and Ankrah, 2002). Goudegn (2000) reported that 5% NSE treatment sig lowered populations of the diamondback moth cabbage in Benin.…”

Section: Resultsmentioning

confidence: 98%

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Influence of weeding regime and neem seed extract on the population of insect pests and yield of cabbage in the Guinea savannah zone

Dzomeku¹,

Abudulai²

2011

ABJNA

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This experiment was conducted during the 2005 and 2006 cropping seasons at the research field of the Faculty of Agriculture, University for Development Studies, on Nyankpala campus near Tamale in the Guinea savannah zone of Ghana. The objectives of the study were to determine the influence of weeding regime and application of neem seed extract (NSE) on insect pest populations and yield of cabbage. The experiment was a 3 x 5 factorial laid out in randomized complete block design with three replications. The treatments consisted of: hoe weeding every 2 or 3 weeks and unweeded control combined with applications of NSE at 2% (w/v), 5% and 10%, and Karate 2.5 EC (Lambda cyhalothrin) and water-treated control. The results indicated the occurrence of broadleaves, grasses, sedges and shrubs in order of dominance as weed species. Insect species prevalent included grasshoppers (Zonocerus variegatus [L.]), crickets (Gryllus spp.), caterpillars of diamondback moth (Plutella xylostella L.), cabbage webworm (Hellula undalis F.), and flea beetles (Phyllotreta cruciferae [Goeze]). Snails (Helix pomatia L.) were the other prevalent pests recorded. Weed biomass was affected only by weeding regime and was highest on control plots followed by plots weeded every 3 weeks and every 2 weeks, respectively. Weeding regime significantly affected the populations of insect pests on cabbage. Hoeing every 2 or 3 weeks lowered pest populations with consequent stability in plant population and increased cabbage yield more than the control plots. The 10% NSE was highly effective and gave better protection to cabbage plants against pest damage than the 5% NSE, Karate, 2% NSE and watertreated control with corresponding increase in yield and cosmetic beauty of cabbage heads. Overall however, between 5% -10% NSE can be used as an alternative to the synthetic insecticide Karate to control insect pests of cabbage. Also, weeding every 3 weeks was adequate to avoid yield loss due to weed competition.

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“…The 10% NSE treatment gave the bage head yield. These results the findings by Schmutterer (1990), Goudegnon et al (2000) …”

Section: Effect Of Weeding Regime On Insect and S Populationssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 98%

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Influence of weeding regime and neem seed extract on the population of insect pests and yield of cabbage in the Guinea savannah zone

Dzomeku¹,

Abudulai²

2011

ABJNA

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“…As reported from several tropical countries (Talekar and Shelton, 1993;Baek et al, 2005;Nyambo and Löhr, 2005;Ayalew, 2006;Odhiambo et al, 2010;Santos et al, 2011;Zhou et al, 2011;Legwaila et al, 2014), P. xylostella populations from Togo and Benin also appear to be resistant to a number of insecticides commonly used in different agroecosystems (Goudegnon et al, 2000;Martin et al, 2006;Godonou et al, 2009;Agboyi et al, 2013). As a reaction to this phenomenon, cabbage producers have entered the vicious circle of increasing both insecticide dosage rates and spraying frequencies (Ahouangninou et al, 2012), which can lead to environmental and health hazards (Pimentel et al, 1997;Gallivan et al, 2001).…”

Section: Introductionmentioning

confidence: 79%

“…In this strategy, a product was withdrawn from the market when resistance was observed, to suppress the selection pressure, and subsequently reintroduced when the susceptibility had recovered. Spinosad is compatible with beneficial insects, including C. vestalis, an effective parasitoid against P. xylostella in lowlands of East Africa (Nyambo and Löhr, 2005;Kahuthia-Gathu, 2011), South Africa (Kfir, 2005;Manyangarirwa et al, 2009) and West Africa (Goudegnon et al, 2000;Arvanitakis et al, 2014). As described by Rowell et al (2005), the main constraint to the efficacy of this parasitoid in controlling P. xylostella in many areas, including Togo and Benin, is the excessive use of broadspectrum synthetic pesticides.…”

Section: Discussionmentioning

confidence: 99%

Pesticide resistance in Plutella xylostella (Lepidoptera: Plutellidae) populations from Togo and Benin

Agboyi

Ketoh

Martin

et al. 2016

Int. J. Trop. Insect Sci.

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Abstract. The diamondback moth, Plutella xylostella (L.) is the major insect pest of cabbage crops in Togo and Benin. For control, farmers very often resort to spraying chemical insecticides at high dosages with frequent applications. Bioassays were carried out on three populations of P. xylostella, two from Togo (Kara and Dapaong) and one from Benin (Cotonou), to assess their level of susceptibility to currently used insecticides. A reference strain of P. xylostella from Matuu in Kenya was used as a control. In the laboratory, three insecticide representatives of different chemical families (deltamethrin, chlorpyrifos ethyl and spinosad) were assayed against third instar larvae of P. xylostella. Results revealed that P. xylostella populations from Dapaong, Kara and Cotonou were more resistant to deltamethrin (13 to 59-fold at LC 50 level, 149 to 1772-fold at LC 90 level) and chlorpyrifos ethyl (5 to 15-fold at LC 50 level, 9 to 885-fold at LC 90 level) than the reference strain. Spinosad was more toxic to P. xylostella populations than the other insecticides with LC 50 and LC 90 values less than 1 µg/ml and 15 µg/ml, respectively. However, the population from Cotonou appeared significantly more resistant to spinosad compared to the reference strain. These results are discussed in the light of developing an integrated pest management strategy for reducing the selection pressure of spinosad.

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United States Department of Agriculture–Agricultural Research Service research on biological control of arthropods

Hopper

2003

Pest Management Science

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During 1999-2001, ARS scientists published over 100 papers on more than 30 species of insect pest and 60 species of predator and parasitoid. These papers address issues crucial to the three strategies of biological control: conservation, augmentation and introduction. Conservation biological control includes both conserving extant populations of natural enemies by using relatively non-toxic pesticides and increasing the abundance of natural enemies in crops by providing or improving refuges for population growth and dispersal into crops. ARS scientists have been very active in determining the effects of pesticides on beneficial arthropods and in studying movement of natural enemies from refuges into crops. Augmentation involves repeated releases of natural enemies in the field, which can be inoculative or inundative. Inoculative releases are used to initiate self-propagating populations at times or in places where they would be slow to colonize. ARS scientists have studied augmentative biological control of a variety of pest insects. The targets are mostly pests in annual crops or other ephemeral habitats, where self-reproducing populations of natural enemies are not sufficiently abundant early enough to keep pest populations in check. ARS research in augmentative biological control centers on methods for rearing large numbers of healthy, effective natural enemies and for releasing them where and when they are needed at a cost less than the value of the reduction in damage to the crop. ARS scientists have researched various aspects of introductions of exotic biological control agents against a diversity of pest insects. The major issues in biological control introductions are accurate identification and adequate systematics of both natural enemies and target pests, exploration for natural enemies, predicting the success of candidates for introduction and the likelihood of non-target impacts, quarantine and rearing methods, and post-introduction evaluation of establishment, control and non-target impacts. ARS scientists have published research on several general issues in biological control. Among the most important are the mechanisms affecting mate- and host-finding and host specificity.

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Comparative effects of deltamethrin and Neem kernel solution treatments on Diamondback moth and Cotesia plutellae (Hym., Braconidae) parasitoid populations in the Cotonou peri‐urban area in Benin

Cited by 27 publications

References 10 publications

Influence of weeding regime and neem seed extract on the population of insect pests and yield of cabbage in the Guinea savannah zone

Influence of weeding regime and neem seed extract on the population of insect pests and yield of cabbage in the Guinea savannah zone

Pesticide resistance in Plutella xylostella (Lepidoptera: Plutellidae) populations from Togo and Benin

United States Department of Agriculture–Agricultural Research Service research on biological control of arthropods

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