Influence of essential oils onPhytophthora infestans

Quintanilla, P.; Rohloff, Jens; Iversen, Tor‐Henning

doi:10.1007/bf02736117

Cited by 30 publications

(21 citation statements)

References 4 publications

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“…However, in the parallel P. foveata experiments (Table 3), similar doses, the same oil batches and the same original conidial suspensions were used. In accordance with results presented here, T. vulgaris EO has been reported to give diverging results in vitro and in vivo against Phytophthora infestans (Quintanilla et al 2002), and Guynot et al (2003) found it to have potent fungicidal activity on bread spoilage fungi in vitro, but only weak effects in tests with sponge cake analogues. In addition, Arras and Usai (2001) found the effects of T. capitatus oil against Penicillium digitatum on orange fruits to be weaker than expectations based on in vitro results.…”

Section: Discussionsupporting

confidence: 91%

Screening of Natural Plant Volatiles to Control the Potato (Solanum tuberosum) Pathogens Helminthosporium solani, Fusarium solani, Phoma foveata and Rhizoctonia solani

Bång

2007

Potato Res.

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The potential utility of natural volatiles in various essential oils (EOs) from plants as fumigants to control potato tuber (Solanum tuberosum L.) pathogens was assessed. The antifungal effects of the volatiles at various concentrations were studied at 10°C both in vitro using conidial suspensions of Helminthosporium solani, Fusarium solani var. coeruleum and Phoma foveata plated on agar, and in vivo by inoculating potato tubers. The effects of the volatiles on the mycelial growth of Rhizoctonia solani were also studied, but only in vitro. Vapours of many of the EOs tested exhibited some fungicidal activity but volatiles of garlic, Allium sativum, were, with few exceptions, most effective on all four pathogens in all experiments. An exposure time of at least 2 weeks was usually required for good control of disease development in vivo. Vapours of A. sativum never stimulated conidial germination, as was observed with some other oils, or damaged tubers, but those of Armoracia rusticana caused tuber collapse. Volatiles from thyme (Thymus vulgaris) EO showed antifungal activity in vitro on all four pathogens, but did not control F. solani, P. foveata or H. solani in vivo. In contrast, sage (Salvia officinalis) EO was ineffective against P. foveata and H. solani in the in vitro system, but controlled disease development in vivo at similar doses. The sometimes conflicting results obtained in the two test systems show that screening in vitro only is insufficient for evaluation of potent antifungal substances to be used in practice.

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Section: Discussionsupporting

confidence: 91%

Screening of Natural Plant Volatiles to Control the Potato (Solanum tuberosum) Pathogens Helminthosporium solani, Fusarium solani, Phoma foveata and Rhizoctonia solani

Bång

2007

Potato Res.

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“…II). This corresponds to results of other studies which have demonstrated the efficacy of natural products in reducing leaf infestation on potato and tomato by P. infestans (Blaeser and Steiner, 1999;Quintanilla et al, 2002;Dorn et al, 2007;Wang et al, 2007). None of the plant extracts controlled disease as well as Ridomil Plus and Plantineb.…”

Section: Inhibition Of P Infestans On Whole Tomato Plants In the Gresupporting

confidence: 88%

“…Studies examining different Solanaceous crops have reported that essential oils and plant extracts are effective growth inhibitors of P. infestans. Quintanilla et al (2002) demonstrated that the essential oil of Hyssopus officinalis could inhibit the mycelial growth of P. infestans and suppress late blight on potato plants in growth chambers. Extracts from Potentilla erecta, Salviae officinalis (Blaeser and Steiner, 1999;Dorn et al, 2007), Galla chinensis and Rheum rhabarbarum (Wang et al, 2007) have also shown promising effects against potato late blight.…”

Section: Introductionmentioning

confidence: 99%

High efficacy of extracts of Cameroon plants against tomato late blight disease

Goufo

Mofor

Fontem

et al. 2008

Agron. Sustain. Dev.

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-The classical protection of tomato plants against the late blight disease caused by the fungi Phytophthora infestans involves the use of synthetic fungicides. However, such a practice raises two major issues. First, synthetic fungicides are toxic substances that are a threat to the ecosystem. Second, the efficiency of synthetic fungicides is decreasing due to the development of fungicide resistance by the fungi. In addition, there is growing concern from consumers about food contamination due to heavy reliance on toxic and persistent chemicals in plant protection strategies. Therefore, there is a necessity to evaluate the efficacy of alternative compounds. Biologically active products occur in plants for protection against pests, pathogens and other plants. Such compounds could be valuable as biopesticides for controlling plant diseases because they are biodegradable and selective in their activities. In that context, we conducted laboratory and greenhouse experiments to assess the efficacy of nine extracts of native plants of Cameroon in controlling P. infestans. Sporangial germination was determined after 24 h of incubation on 1.5% water agar medium at 18• C in the dark. Lesion size, and late blight latency and severity were assessed on 7-8-week-old detached leaflets and whole tomato plants incubated in the greenhouse for 7 days. Our results showed that Cupressus benthamii and Vetiveria zizanioides extracts were the most effective preparations, leading to 23% and 35% inhibition of sporangial germination, respectively, and to 86% and 77% disease reduction. A clear relationship between disease latency and disease severity was established. The identification of C. benthamii and V. zizanioides extracts as potential alternate compounds for late blight control is a major step in the process of replacing harmful pesticides. Using these biopesticides in combination with other established disease management practices could help control late blight in a more sustainable and environmentally friendly way. plant extracts / Phytophthora infestans / late blight / tomato / antifungal activity / disease suppression / biopesticide

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“…Considering these problems, it has become vital to develop strategies based on the rational use of fungicides or to replace them with alternative products (CHRISTIAN; GOGGI, 2008;GHINI;KIMATI, 2000). Essential oils have shown biological activity that may offer an alternative strategy in the control of plant pathogens (MIHALIAK et al, 1991;STANGARLIN et al, 1999;ISMAN, 2000;KOTZEKIDOU et al, 2008) due to fungitoxic action (FUORI et al, 2000;BONALDO et al, 2004;BANG, 2007) or by inducing resistance in plants ( SCHWAN-ESTRADA, 2003;QUINTANILLA et al, 2002;PEREIRA et al, 2011).…”

Section: Angular Leaf Spot (Als) Caused Bymentioning

confidence: 99%

Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils

et al. 2012

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Pseudocercospora griseola, the etiologic agent of angular leaf spot of common bean (Phaseolus vulgaris), is an important disease in all bean-producing regions worldwide and may cause extremely high yield losses. The control of this disease is made more difficult by the pathogen's genetic variability and the inefficiency of fungicides. In this study, of 26 essential oils tested at different concentrations, 25 demonstrated efficiency in affecting the germination of strains 63-31 and 63-63 of the pathogen, reaching inhibition levels of between 80% and 100%. Cymbopogon citratus and Cymbopogon martinii inhibited conidia germination at all concentrations; Eugenia caryophyllata, Cinnamomum sp., Thymus vulgaris, Matricaria recutita, Cordia verbenacea, Origanum vulgare, Cymbopogon nardus, at 0.1 and 0.5%; and Zingiber officinale, Mentha arvensis, Chamaecyparis pisifera, Lavandula officinalis, Ocimum basilicum, Pimpinella anisum, Ocimum selloi, Baccharis dracunculifolia, Laurus nobilis, Citrus sinensis, Melaleuca alternifolia and Eucalyptus globulus, at 0.5%. The main constituents identified were cinnamaldehyde in Cinnamomum sp.; eugenol in E. caryophyllata; trans-β-farnesene in M. recutita; pulegone in C. verbenacea; thymol in T. vulgaris; geranial and neral in C. citratus, and geraniol in C. martini. Through transmission electron microscopy (TEM), it was verified that C. citratus, C. martini and E. caryophyllata presented direct fungitoxic action on P. griseola, causing severe damage to the cellular ultrastructure of the conidia, invalidating germination. These results indicated that essential oils are a promising alternative strategy for the control of angular leaf spot in bean, representing less risk to human health and the environment.

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Influence of essential oils onPhytophthora infestans

Cited by 30 publications

References 4 publications

Screening of Natural Plant Volatiles to Control the Potato (Solanum tuberosum) Pathogens Helminthosporium solani, Fusarium solani, Phoma foveata and Rhizoctonia solani

Screening of Natural Plant Volatiles to Control the Potato (Solanum tuberosum) Pathogens Helminthosporium solani, Fusarium solani, Phoma foveata and Rhizoctonia solani

High efficacy of extracts of Cameroon plants against tomato late blight disease

Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils

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