Botanical Pesticide Mixtures for Insect Pest Management on Cowpea,<i>Vigna unguiculata</i>(L.) Walp Plants–The Legume Flower Bud Thrips,<i>Megalurothrips sjostedti</i>Trybom

Oparaeke, A. M.; Dike, M. C.; Amatobi, C. I.

doi:10.1300/j064v29n01_03

Cited by 21 publications

(18 citation statements)

References 7 publications

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“…In our study, Eucalyptus extract with 1–8 cineole as a major constituent was a good repellent against M. sjostedti . Oparaeke et al [ 49 ], reported that the mean number of M. sjostedti was significantly reduced on plots sprayed with plant extracts mixed with Eucalyptus compared to unsprayed plots for two consecutive seasons. Similarly, Koschier and Sedy [ 50 ] reported repellency of 1,8-cineole (eucalyptol), a major constituent in rosemary oil, to female onion thrips.…”

Section: Disscussionmentioning

confidence: 99%

“…Picard et al [ 20 ] indicated that an application method incorporating the oils into polymeric mixture coatings to protect the bioactivity of the active compounds shows a better distribution and maintains high concentrations of active compounds on the surface of the leaves for a longer period. Many plant extracts are selective to certain pests, often biodegrade to nontoxic products and have few or no harmful effects on non target organisms and the environment [ 49 , 56 , 57 ]. They also can be useful to maximize thrips control efficiency and sustainability, while minimizing negative environmental effects.…”

Section: Disscussionmentioning

confidence: 99%

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Repellency of Plant Extracts against the Legume Flower Thrips Megalurothrips sjostedti (Thysanoptera: Thripidae)

Abtew

Subramanian

Cheseto

et al. 2015

Insects

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Megalurothrips sjostedti Trybom is an important pest of cowpea (Vigna unguiculata L.) in Africa. To propose an alternative to chemical control, the repellency of 24 plant extracts was evaluated against adult female thrips of M. sjostedti in the laboratory. Plant extracts in ethanol were separately applied on a filter paper disk in a still air visual cue olfactometer. The results showed highly significant differences in repellency among extract type, concentration and their interactions. We classified the level of repellency into four categories as strong, good, moderate and weak or non- repellent based on hierarchical ascendant classification. We identified Piper nigrum, Cinnamomum zeylanicum, Cinnamomum cassia as strong repellents. Five extracts were classified as good, eight as moderate and the remaining eight extracts were weak or non-repellent. Repellency of the extracts increased with the concentration suggesting that the behavioral response of M. sjostedti was dose-dependent. Mono- and sesquiterpene hydrocarbon compounds from seven highly repellent extracts were identified by gas chromatography-mass spectrometry (GC/MS). The use of repellent extracts could be useful in developing integrated pest management strategies for thrips on legume crops. In this regard, the specific modes of action of the identified compounds need to be investigated to incorporate them into the existing crop protection strategies.

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Section: Disscussionmentioning

confidence: 99%

Section: Disscussionmentioning

confidence: 99%

Repellency of Plant Extracts against the Legume Flower Thrips Megalurothrips sjostedti (Thysanoptera: Thripidae)

Abtew

Subramanian

Cheseto

et al. 2015

Insects

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“…Spearmint (Mentha spicata) and basil (Ocimum basilicum) are also effective in warding off flies ( Koul and Walia, 2009). Thrips can be significantly reduced when plants sprayed with the combination of essential oils and kaolin especially tea tree oil (Reitz et al,2008) or with leaf extract mixtures of Neem + Eucalyptus, Neem + lemon grass, Neem + bitter leaf, Neem + tomato, and Eucalyptus + African curry (in that order) than on unsprayed plants (Oparaeke et al,2005). Eventhough both essential oils of Eupatorium buniifolium and Artemisia absinthium chemically differed, they exhibited insecticidal and antifungal activity not only by direct contact but also by contact with their vapors against the tested organisms,Trialeurodes vaporariorum and Tuta absoluta, and the fungi Alternaria spp.…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF TWO PLANT EXTRACTS AND FOUR AROMATIC OILS ON Tuta absoluta POPULATION AND PRODUCTIVITY OF TOMATO CULTIVAR GOLD STONE

Hussein

Hak

et al. 2015

Journal of Plant Protection and Pathology

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Plants extracts and essential oils were used in pest management in different crops against various pests. Under field conditions, we examined the effect of two plant extracts and four essential aromatic oils on the response of tomato hybrid cultivar Gold Stone to Tuta absoluta infestation. Also, their effects on some growth characteristics of tomato plants as well as their total phenolic compounds and total flavonoids contents were explored in the two successive summer seasons of 2011 and 2012. The treatments were Lemon grass extract (Cymbopogon citratus) at 25 gm /L., Garlic extract (Allium sativum) at 5ml / L., Eucalyptus oil (Eucalyptus spp.) at 0.5%, Rue oil (Ruta graveolens) at 0.5%, Anise oil (Ocimum basilicum) at 0.5%, Basil oil (Pimpinella anisum) at 0.5%. Ethyl acetate (Solvent) and tap water (Control). The plants were sprayed three times at two week intervals starting after 40 days from transplanting. All treatments reduced population density of Tuta absoluta significantly. The highest reduction was recorded by garlic extract followed by lemon grass extract and basil oil. Lemon grass extract significantly increased Lascorbic acid (Vitamin C) contents in tomato fruits followed by basil oil. Also, garlic extract increased the yield of tomato significantly followed by eucalyptus oil in the first season while in the second season, anise oil followed by garlic extract were insignificantly increased the fruit yield than the other tested treatments. On the other hand, garlic extract recorded the highest values of total phenolic compounds (TPCs) and total flavonoids (TFs) in unifested and infestedtreated tomato leaves.

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“…Thoeming et al [18] showed that dressing bean seeds with neem extracts effectively reduced population of thrips in flowers. Spray of neem extracts have also been shown to manage flower thrips [19]. The active ingredient in neem extracts, azadiractin, disrupts moulting in insect pests [20] while entomopathogenic fungi possess ovicidal, larvicidal and pupicidal effects [21].…”

Section: Introductionmentioning

confidence: 99%

Management of Thrips in French Bean by Integrating Biological and Synthetic Pesticides in Conventional Spray Regimes

Ouma¹,

Muthomi²,

Nderitu³

et al. 2014

JRA

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Thrips are major pest of snap bean that cause losses as high as 60% but the use of synthetic pesticides is restricted due to strict market regulations on maximum residue levels (MRLs). This study aimed at reducing the use of synthetic pesticides by integrating biological and botanical pesticides in the management of thrips in snap bean. On farm experiments were carried out over two cropping cycles to evaluate the efficacy of spray regimes consisting of different combinations of the following: Thunder® (Imidacloprid 100g/L + Betacyfluthrin 45g/L), biological (Metarhizium anisopliae ICIPE 69), botanical (Azadirachtin 0.15%), and Decis (Deltamethrin). Data on thrips population and pod yield were collected and benefit-cost ratio of each spray regime calculated. Integrating synthetic chemical with biological Metarrhizium anisopliae was the most cost effective causing more than 69% thrips reduction, and 50% increase in yields, while integrating Azadirachtin with Metarrhizium anisopliae was the least effective causing less than 20% thrips reduction, and 30% increase in yields compared to control. Integrating synthetic pesticide with Metarrhizium anisopliae had the highest benefit-cost ratio. The results indicated that integrating synthetic pesticides with neem-based and Metarrhizium anisopliae effectively reduces thrips infestation and increase yields, while reducing overall costs and chemical residues in the produce.

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Botanical Pesticide Mixtures for Insect Pest Management on Cowpea,Vigna unguiculata(L.) Walp Plants–The Legume Flower Bud Thrips,Megalurothrips sjostedtiTrybom

Cited by 21 publications

References 7 publications

Repellency of Plant Extracts against the Legume Flower Thrips Megalurothrips sjostedti (Thysanoptera: Thripidae)

Repellency of Plant Extracts against the Legume Flower Thrips Megalurothrips sjostedti (Thysanoptera: Thripidae)

EFFECT OF TWO PLANT EXTRACTS AND FOUR AROMATIC OILS ON Tuta absoluta POPULATION AND PRODUCTIVITY OF TOMATO CULTIVAR GOLD STONE

Management of Thrips in French Bean by Integrating Biological and Synthetic Pesticides in Conventional Spray Regimes

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