Whitefly, aphids and thrips attack on cabbage

Leite, Germano Leão Demolin; Picanço, Marcelo Coutinho; Jham, Gulab N.; Moreira, Márcio Dionízio

doi:10.1590/s0100-204x2006001000003

Cited by 10 publications

(16 citation statements)

References 14 publications

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“…The GBM mixture could, therefore, be used as a potential companion or field boundary crop in cucurbits to enhance beneficial insect populations for the control of sucking insect pests, especially SLW. Leite et al (2006) reported that spiders were limiting factors for population increases of SLW.…”

Section: Discussionmentioning

confidence: 99%

A comparison of alternative plant mixes for conservation bio-control by native beneficial arthropods in vegetable cropping systems in Queensland Australia

Qureshi

Midmore

Syeda

et al. 2009

Bull. Entomol. Res.

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Cucurbit crops host a range of serious sap-sucking insect pests, including silverleaf whitefly (SLW) and aphids, which potentially represent considerable risk to the Australian horticulture industry. These pests are extremely polyphagous with a wide host range. Chemical control is made difficult due to resistance and pollution, and other side-effects are associated with insecticide use. Consequently, there is much interest in maximising the role of biological control in the management of these sap-sucking insect pests. This study aimed to evaluate companion cropping alongside cucurbit crops in a tropical setting as a means to increase the populations of beneficial insects and spiders so as to control the major sap-sucking insect pests. The population of beneficial and harmful insects, with a focus on SLW and aphids, and other invertebrates were sampled weekly on four different crops which could be used for habitat manipulation: Goodbug Mix (GBM; a proprietary seed mixture including self-sowing annual and perennial herbaceous flower species); lablab (Lablab purpureus L. Sweet); lucerne (Medicago sativa L.); and niger (Guizotia abyssinica (L.f.) Cass.). Lablab hosted the highest numbers of beneficial insects (larvae and adults of lacewing (Mallada signata (Schneider)), ladybird beetles (Coccinella transversalis Fabricius) and spiders) while GBM hosted the highest numbers of European bees (Apis mellifera Linnaeus) and spiders. Lucerne and niger showed little promise in hosting beneficial insects, but lucerne hosted significantly more spiders (double the numbers) than niger. Lucerne hosted significantly more of the harmful insect species of aphids (Aphis gossypii (Glover)) and Myzus persicae (Sulzer)) and heliothis (Heliothis armigera Hü bner). Niger hosted significantly more vegetable weevils (Listroderes difficillis (Germar)) than the other three species. Therefore, lablab and GBM appear to be viable options to grow within cucurbits or as field boundary crops to attract and increase beneficial insects and spiders for the control of sap-sucking insect pests. Use of these bio-control strategies affords the opportunity to minimise pesticide usage and the risks associated with pollution.

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Section: Discussionmentioning

confidence: 99%

A comparison of alternative plant mixes for conservation bio-control by native beneficial arthropods in vegetable cropping systems in Queensland Australia

Qureshi

Midmore

Syeda

et al. 2009

Bull. Entomol. Res.

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“…They can quickly lower pest populations in several crop species (Yeargan, 1975;Nyffeler et al, 1994). Spiders have been considered as limiting factors for population increases of SLW (Leite et al, 2006) and the reduction of SLW numbers in the present studies may be due in part to the presence of spiders.…”

Section: Discussionmentioning

confidence: 65%

Use of lablab (Lablab purpureus (L.) Sweet) for bio-control by native arthropods and its effect on yield of pumpkins

Qureshi

Angove

Wilkens

et al. 2015

Bull. Entomol. Res.

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Silverleaf whitefly (SLW, Bemisia tabaci MEAM1) and aphids are sap-sucking insects, which pose a serious threat to Australian cucurbit crops and the horticulture industry. Traditional chemical control for these insect pests is becoming less effective, and there is a need to search for alternative or supplementary methods. This study aimed to manipulate the habitat of pumpkin crops in a tropical setting (Queensland, Australia), by growing pumpkins (var. Japanese pumpkin) alone and between lablab (Lablab purpureus L. Sweet). It was hypothesized that the presence of lablab will increase the populations of natural enemies, and through their control of insect pests such as SLW and aphids, will affect pumpkin yield. The population of arthropods (natural enemies and pests of pumpkin), with a focus on SLW and aphids, were sampled weekly on both lablab and pumpkin crop for a total of 21 weeks. Results showed that lablab hosted more enemies of SLW per plant than pumpkin in either treatment. In addition, adult SLW numbers were significantly higher in the pumpkin-only crop compared with the pumpkin grown between lablab, while pumpkin in the mixed plantings had significantly more ladybirds and lacewing larvae (P < 0.05). While there was no significant difference in the average fruit weight between treatments, the total weight (kg) and number of marketable pumpkins per hectare was greater (P < 0.05) for the pumpkin/lablab treatment than the pumpkin-only treatment. This study shows that growing lablab alongside a pumpkin crop may enhance natural enemies of SLW and could significantly increase the yield.

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“…Trichome density was determined on one expanded leaf from the apical, medium, and bottom canopy strata of 10 plants per crop (three leaves per plant), which were collected monthly in Guidoval and Viçosa, prepared on slides, and the trichome assessed (Leite et al, 2001a;2001b;2002a;2002b;2002c;2005a;2005b;2005c;2006a;2011). Leaf N and K levels were determined monthly in the laboratory from one expanded leaf of the upper parts of 10 plants per crop in both municipalities.…”

Section: Methodsmentioning

confidence: 99%

“…These leaves were dried and ground, K was determined with a flame photometer, and N analyzed by the Nessler method. Fully expanded apical leaves of 10 plants per crop were sampled monthly in both municipalities by gas chromatography/mass spectrometry (GC/MS) and hexane analyses were performed as in Leite et al (2001a;2001b;2002a;2002b;2002c;2005a;2005b;2005c;2006a, 2011. Morphological, nutritional, and chemical analyses were made with three independent monthly evaluations for each plantation.…”

Section: Methodsmentioning

confidence: 99%

“…Leaf N and K levels, allelochemicals, trichomes (type and density), natural enemy and pest populations, and weather effect on the main vegetables cultivated in Brazil, such as Abelmoschus esculentus (L.) Moench (Malvaceae), Brassica oleracea L. vars. acephala and capitata (Brassicaceae), Capsicum annuum L. (Solanaceae), Cucurbita moschata (Duchesne), C. maxima Duchesne and Cucumis sativus L. (Cucurbitaceae), Lycopersicon esculentum Mill., Solanum gilo Raddi and S. melongena L. (Solanaceae), and Phaseolus vulgaris L. (Fabaceae), have been studied (Leite et al, 2001a;2001b;2002a;2002b;2002c;2005a;2005b;2005c;2006a;2011) with the objective of comparing host capacity of those plants for insect pests, the relationships of these pests with their morphologic, nutritional, and chemical features, their natural enemies, and weather conditions in order to propose crop rotation and management procedures of neighboring plants to reduce insect damage.…”

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confidence: 99%

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Hosting Capacity of Horticultural Plants for Insect Pests in Brazil

Leite

Picanço²,

Zanúncio³

et al. 2011

Chilean J. Agric. Res.

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Factors such as fertilization, allelochemicals, trichomes, weather, and natural enemies can influence pest populations. Thus, it is necessary to understand the factors that predispose vegetable species to pests and the role of polyculture, crop rotation, and neighboring plants. The objective of this research was to study the hosting capacity for pests of Abelmoschus esculentus (L.), Brassica oleracea L. vars. acephala and capitata, Capsicum annuum L., Cucurbita moschata (Duchesne), Cucurbita maxima Duchesne and Cucumis sativus L., Lycopersicon esculentum Mill., Solanum gilo Raddi and Solanum melongena L., and Phaseolus vulgaris L. The higher density of Bemisia tabaci (Genn.) adults on C. sativus can be due to the higher amount of pentacosane and octacosane in this plant. The occurrence of Brevicoryne brassicae (L.) only in Brassica spp. can be accounted for by the nonacosane of these plants. The low trichome density and greater palmitic acid level can explain the greatest damage by Aphis gossypii Glover in A. esculentum. Empoasca sp. was more frequent in P. vulgaris followed by A. esculentum, which are plants with lower K content. Solanum melongena was attacked more by Hydrangea similis (Walker) and Epitrix sp. perhaps because of higher palmitic acid and 11,14,17-eicosatrienoic methyl ester concentrations in their leaves. Frankliniella sp. exhibited more damage in C. sativus probably owing to higher pentacosane and octacosane in its leaves. Sistena sp. was more frequent in C. maxima and had higher octadecane levels and trichome density. The presence of ∞-humulene and hexacosane can explain the damage by Tuta absoluta (Meyrick) on L. esculentum.

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Whitefly, aphids and thrips attack on cabbage

Cited by 10 publications

References 14 publications

A comparison of alternative plant mixes for conservation bio-control by native beneficial arthropods in vegetable cropping systems in Queensland Australia

A comparison of alternative plant mixes for conservation bio-control by native beneficial arthropods in vegetable cropping systems in Queensland Australia

Use of lablab (Lablab purpureus (L.) Sweet) for bio-control by native arthropods and its effect on yield of pumpkins

Hosting Capacity of Horticultural Plants for Insect Pests in Brazil

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