Evaluation of non-chemical seed treatment methods for the control of Alternaria dauci and A. radicina on carrot seeds

Koch, Eckhard; Schmitt, Annegret; Stephan, Dietrich A.; Kromphardt, C.; Jahn, Marga; Krauthausen, H. J.; Forsberg, G.; Werner, S.; Amein, T.; Wright, Sandra A. I.; Tinivella, F.; Gullino, M. L.; Roberts, S. J.; Wolf, Jan van der; Groot, Steven P. C.

doi:10.1007/s10658-009-9575-3

Cited by 48 publications

(63 citation statements)

References 23 publications

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“…Indeed, some of the treatments increased germination with respect to noninoculated non-treated seeds. Although similar results have been reported previously (Khan and Kumar, 1993;Souza et al, 2002;Brand et al, 2007;Koch et al, 2010;Steffen et al, 2010;Wulff et al, 2011), essential oils do not always exert a positive effect on seed quality. For example, the oils from Cinnamomum zeylanicum (Alves et al, 2004;Van der Wolf et al, 2008), Eucalyptus citriodora (Batish et al, 2004), and Agastache rugosa (Kim, 2008) inhibited, to varying extents, seed germination and seedling development.…”

Section: Discussionsupporting

confidence: 90%

“…Nevertheless, treatment of batches of potentially infected seeds with biocides prior to cultivation is more economical, reasonably efficient and commonly employed to control the dissemination of phytopathogens in the field (Machado, 2000). Various natural plant products are known to be effective against seed-associated pathogens Atanda et al, 2007;Brand et al, 2007;Slusarenko et al, 2008;Dhingra et al, 2009;Koch et al, 2010;Steffen et al, 2010), while the essential oils from the traditional Brazilian medicinal plants "hortelã do campo" [Hyptis marrubioides (Lamiaceae)], "alfazema-do-Brasil" [Aloysia gratissima (Verbenaceae)] and "erva-baleeira" [Cordia verbenacea (Boraginaceae)] have been shown to be effective in the control of Asian soybean rust (Silva et al, 2012a,b). In this context, we have investigated the effect of essential oils from these medicinal plant species on C. truncatum-infected seeds and, ultimately, on the control of anthracnose under greenhouse conditions.…”

Section: Introductionmentioning

confidence: 99%

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Effectiveness of essential oils in the treatment of Colletotrichum truncatum-infected soybean seeds

Silva¹,

Souza²,

Machado³

et al. 2012

Trop. plant pathol.

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The aim of the study was to evaluate the antifungal activity of essential oils from "hortelã do campo" (Hyptis marrubioides), "alfazema-do-Brasil" (Aloysia gratissima) and "erva-baleeira" (Cordia verbenacea) and their efficacy in the treatment of soybean seeds infected with Colletotrichum truncatum. In vitro assays were performed to evaluate the effects of the oils on spore germination, mycelial growth, and the production and viability of C. truncatum conidia. Soybean seeds inoculated with C. truncatum were treated with essential oils at concentrations ranging from 0.5 to 2% and grown under greenhouse conditions. Seed health and germination percentages were evaluated according to standard protocols. Seedling emergence, stand establishment and the percentages of dead seedlings were determined, together with the emergence speed index, plantlet height and dry weight of aerial biomass. The oils from H. marrubioides, C. verbenacea and A. gratissima inhibited the germination and production of conidia as well as the growth of C. truncatum. At concentrations ≥ 1%, the effectiveness of the oils against soybean anthracnose was superior to, or at least comparable with, that of the fungicide carbendazim. The viability of conidia and the germination of soybean seeds were not affected by any of the treatments with essential oils. It is concluded that essential oils from H. marrubioides, A. gratissima and C. verbenacea have potential as alternatives to synthetic fungicides in the control of anthracnose in soybean seeds.

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Section: Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Effectiveness of essential oils in the treatment of Colletotrichum truncatum-infected soybean seeds

Silva¹,

Souza²,

Machado³

et al. 2012

Trop. plant pathol.

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“…Some experiments revealed that thyme oil may be effectively used also to control Alternaria spp. on carrot seeds [Dorna et al 2008, Koch et al 2010, Riccioni and Orzali 2011, Lopez-Reyes et al 2016. Properties of fir oil are less known, however its chemical composition may indicate antimicrobial activity.…”

Section: Discussionmentioning

confidence: 99%

“…increased vacuolization of the cytoplasm and accumulation of lipid bodies, undulations of the plasmalemma, and alterations of the mitochondria and endoplasmic reticulum. Several authors confirmed that thyme oil may completely inhibit or significantly limit growth of fungal plant pathogens [Zambonelli et al 1996, Daferera et al 2003, Dorna et al 2008, Barrera-Necha et al 2009, Koch et al 2010, Riccioni and Orzali 2011, Lopez-Reyes et al 2016.…”

Section: Introductionmentioning

confidence: 93%

THE EFFECT OF ACETIC ACID, GRAPEFRUIT EXTRACT AND SELECTED ESSENTIAL OILS ON GERMINATION, VIGOUR AND HEALTH OF CARROT (Daucus carota L.) SEEDS

Yang-yang¹,

Szopińska²

2018

Acta.Sci.Pol.,Hortorum Cultus

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Seed infection with Alternaria spp. is an important source of severe carrot diseases. The aim of the study was to evaluate the effects of carrot seed treatments with acetic acid, grapefruit extract and volatile compounds of fir (Abies alba Mill.) and thyme (Thymus vulgaris L.) essential oils on their germination, vigour and health. Seeds of two samples were soaked for 30 min in 0.5, 1 and 2% acetic acid, 0.5 and 1% Biosept Active (33% of grapefruit extract), or treated for 72 h or 96 h with volatile compounds of fir and thyme oils individually (10 µl), and jointly (5+5 µl). Controls were untreated seeds and seeds soaked in distilled water. Acetic acid effectively controlled A. alternata and A. radicina in both samples, and did not affect adversely seed germination, however, at the highest concentration deteriorated seed vigour. Biosept Active was less effective, however at 1% concentration decreased seeds infestation with A. alternata in sample I, and at concentrations of 0.5 and 1% reduced percentages of seeds infested with A. alternata and A. radicina in sample II. Essential oils treatments in some cases favoured growth of A. dauci and A. radicina.

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“…radicina . In addition, the effect of hot water treatment was signi fi cantly improved, when combined with either of the bacterial or fungal biocontrol agents (Koch et al 2010 ) . Application of the biofumigant fungus Muscodor albus treatment of wheat seeds effectively protected the plants against wheat common bunt disease caused by Tilletia caries (Goates and Mercier 2011 ) .…”

Section: Production Of Propagative Plant Materials Free Of Fungal Andmentioning

confidence: 99%

Cultural Practices Influencing Biological Management of Crop Diseases

Narayanasamy¹

2013

Biological Management of Diseases of Crops

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Evaluation of non-chemical seed treatment methods for the control of Alternaria dauci and A. radicina on carrot seeds

Cited by 48 publications

References 23 publications

Effectiveness of essential oils in the treatment of Colletotrichum truncatum-infected soybean seeds

Effectiveness of essential oils in the treatment of Colletotrichum truncatum-infected soybean seeds

THE EFFECT OF ACETIC ACID, GRAPEFRUIT EXTRACT AND SELECTED ESSENTIAL OILS ON GERMINATION, VIGOUR AND HEALTH OF CARROT (Daucus carota L.) SEEDS

Cultural Practices Influencing Biological Management of Crop Diseases

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