Using marigold (Tagetes spp.) as a cover crop to protect crops from plant-parasitic nematodes

Hooks, Cerruti R. R.; Wang, Koon‐Hui; Ploeg, Antoon T.; McSorley, Robert

doi:10.1016/j.apsoil.2010.09.005

Cited by 193 publications

(128 citation statements)

References 61 publications

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“…In addition, the response to the application of HS may depend on other factors, such as the composition of the substances (Hooks, Wang, Ploeg, & Mcsorley, 2010), in addition to the fact that the nature of these organic compounds is relatively complex and there is unconsolidated knowledge on the action of the humic fraction on plants due to its composition and chemical structure, which have not been elucidated and are variable (Baldotto, & Baldotto, 2014). The effect of the application of PE together with HS might be due to its biocide action on harmful organisms, such as nematodes, as reported by Hooks et al (2010), which may have promoted the preservation of the root system and stimulated root growth.…”

Section: Resultsmentioning

confidence: 99%

<b>Roots of ‘BRS Princesa’ banana fertigated with humic substances and saponin-based plant extracts

et al. 2016

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ABSTRACT. This study aimed to evaluate the effects of fertigation with humic substances, with and without the addition of plant extracts, on the root system of the 'BRS Princesa' banana cultivar. The banana crop was cultivated at a spacing of 2.0 x 2.5 m and fertigated using a drip system in a dystrocohesive Yellow Latosol. The experimental design was randomized blocks, in a split-split-plot scheme with five replicates, for the following factors: humic substance doses and presence of a plant extract formulation. The treatments consisted of five doses of humic substances, based on a reference dose of 14.14 L ha , in the presence and absence of plant extract. The variable root length (cm) was subjected to variance analyses to evaluate the effect of the humic substances, either isolated or in interaction with plant extract and soil depth. The use of the plant extract increased the effect of the humic substance on root length but overshadowed its effect for the different doses of humic substance. Root length was not sensitive to increasing humic substance dose with plant extract for doses of up to 42.42 L ha -1 at 0 -0.40 m depth.

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Section: Resultsmentioning

confidence: 99%

<b>Roots of ‘BRS Princesa’ banana fertigated with humic substances and saponin-based plant extracts

et al. 2016

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“…The absolute root length means (RL) by using PE with HS were larger than RL without using PE even for those doses in which RL did not show statistical difference. This application of PE stimulates growth action on the root system and provides a biocide action on harmful organisms, such as nematodes, as reported by Hooks et al (2010). This fact possibly conditioned the preservation of the root system ); and length (LCF, cm) and diameter (DCF, cm) of the central fruit of the second hand.…”

Section: Ph (Water)mentioning

confidence: 95%

“…In addition, the responses to the applications of HS and PE may depend on other factors such as the composition of the substances present in the extracts (Hooks, et al 2010). Besides, the nature of these organic compounds is relatively complex and there is unconsolidated knowledge on the action of the humic fraction on plants due to its composition and chemical structure, which has not been elucidated and is variable (Baldotto and Baldotto, 2014).…”

Section: Ph (Water)mentioning

confidence: 99%

“…The use of plant extracts as tools of alternative pest control (Hooks et al, 2010) may cause, indirectly, the maintenance or increment in banana yield due to the conservation of the root system and, consequently, in the capacity of the plant to absorb water and nutrients from the soil solution. The association of these substances in the irrigated cultivation of banana can be advantageous, but needs technical-scientific support.…”

Section: Introductionmentioning

confidence: 99%

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Fertigation of ‘BRS Princesa’ banana with humic substance and saponin-based plant extracts

et al. 2017

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RESUMO Submitted on February 29th, 2016 The use of humic substances and plant extract has been increasing mainly in organic crop systems without scientificbased recommendations. Research is necessary to evaluate the feasibility and the recommendations of these substances. The objective of this work was to evaluate the effect of humic substances (humic and fulvic acids) applied by fertigation with and without saponin-based plant extracts on growth and yield of 'BRS Princesa' banana. The experiment was carried out using the banana cultivar 'BRS Princesa', at a spacing of 2.0 × 2. ) applied with and without a saponin-based plant extract in a randomized block design in split-plot scheme. The following growth variables were evaluated: number of leaves, pseudostem height, pseudostem diameter, and length and width of the third leaf. The number of fruits/hand and hands/bunch, hand and bunch yield, and length and fruit diameter of the second central hand were evaluated during harvest. The doses of humic substances influenced only pseudostem height. Hand yield, as well as fruit length and diameter of 'BRS Princesa' banana were higher in plants fertigated with humic substance and plant extract in comparison with plants fertigated with only humic substance. Key words: Fertirrigação da bananeira 'BRS Princesa' com substâncias húmicas e extratos vegetais a base de saponinasO objetivo desse trabalho foi avaliar o efeito de substâncias húmicas (ácido húmico e fúlvico) aplicadas via fertirrigação com e sem extratos vegetais a base de saponinas nas variáveis de crescimento e produção da bananeira BRS Princesa (Musa sp.). O pomar foi instalado em espaçamento de 2,0 m x 2,5 m, em Latossolo Amarelo Distrocoeso, sob regime de fertirrigação por gotejamento, no Recôncavo da Bahia, Brasil. Os tratamentos consistiram em cinco doses de substância húmicas (0,0; 21,14; 31,71; 42,28 e 63,42 L ha -1 ciclo -1 ) com e sem aplicação de extratos vegetais, a base de saponinas. O delineamento experimental adotado foi o de blocos casualizados, em esquema de parcelas subdivididas no espaço com cinco repetições. Foram efetuadas análises biométricas na ocasião da floração e da colheita, sendo avaliados o crescimento e a produção acumulada, respectivamente. Mediante análise estatística foi verificado que, quando as substâncias húmicas foram associadas aos extratos vegetais, ocorreram influências significativas sobre a produtividade de pencas, comprimento e diâmetro de frutos e quando as substâncias húmicas foram aplicadas de forma isolada ocorreram efeitos significativos, apenas, sobre a altura de plantas.Palavras-chave: Extratos de plantas; irrigação por gotejamento; matéria orgânica; Musa sp.

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“…In addition, this plant presents antagonism to nematodes (Hooks et al, 2010) and to other harmful animals (Johnson et al, 1985;Ji et al, 2005), has the ability to grow in infertile soils, although it may not have good development (Monquero et al, 2009;Odhiambo, 2011), good resistance to drought (Meschede et al, 2007;Calonego & Rosolem, 2010), and its fibers are used in the paper industry due to their softness and resistance (Morris & Kays, 2005). The area cultivated with C. juncea in Brazil is 3,000 ha (Signoretti et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Chrysoperla externa (Neuroptera: Chrysopidae) and Utetheisa ornatrix (Lepidoptera: Arctiidae) on organically grown Crotalaria juncea (Fabaceae)

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Tavares

Pereira³

et al. 2012

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-Chrysoperla externa (Neuroptera: Chrysopidae) larvae can avoid foraging on plants of Crotalaria juncea (Fabaceae) after the issuance of floral buds, when the prey of Utetheisa ornatrix (Lepidoptera: Arctiidae) incorporate toxic pyrrolizidine alkaloids from this plant. This reduces the predation and favors increasing the number of adults and eggs of this defoliator on crops of this plant. The aim of the present paper was to evaluate some biological and ecological aspects of C. externa and U. ornatrix on the organic crop of C. juncea in the EMBRAPA Maize and Sorghum in Sete Lagoas, Minas Gerais State, Brazil. Chrysoperla externa and U. ornatrix were more abundant in the vegetative and flowering stages of C. juncea, respectively, with caterpillars of this defoliator feeding on leaves and seeds of this plant. The duration of the stages/instars, survival, lifetime fecundity, and oviposition showed that the branches of C. juncea are a suitable food for U. ornatrix. The abundance of adults and larvae of C. externa was lower in the flowering and pods stages of C. juncea, respectively, when the postures of U. ornatrix are present, probably due to the toxicity of the eggs of this prey to this predator. During these stages, C. externa may be reared with alternative hosts, and when the crops of C. juncea are scarce, an artificial diet should be used for rearing this defoliator in the laboratory for biological research and the development of biological control tactics.

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Using marigold (Tagetes spp.) as a cover crop to protect crops from plant-parasitic nematodes

Cited by 193 publications

References 61 publications

<b>Roots of ‘BRS Princesa’ banana fertigated with humic substances and saponin-based plant extracts

<b>Roots of ‘BRS Princesa’ banana fertigated with humic substances and saponin-based plant extracts

Fertigation of ‘BRS Princesa’ banana with humic substance and saponin-based plant extracts

Chrysoperla externa (Neuroptera: Chrysopidae) and Utetheisa ornatrix (Lepidoptera: Arctiidae) on organically grown Crotalaria juncea (Fabaceae)

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