Control of late blight in organic potato production: evaluation of copper-free preparations under field, growth chamber and laboratory conditions

Dorn, Brigitte; Musa, Tomke; Krebs, H.; Fried, P. M.; Forrer, Hans‐Rudolf

doi:10.1007/s10658-007-9166-0

Cited by 54 publications

(30 citation statements)

References 27 publications

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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%

“…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%

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

confidence: 88%

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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“…Various copper compounds are recommended and are widely used for control of plant diseases caused by bacteria as well (Janse, 2005). Even organic agriculture still relies on copper for control of some diseases (Dorn et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

In vitro effects of copper nanoparticles on plant pathogens, beneficial microbes and crop plants

Banik

Pérez‐de‐Luque

2017

Span. j. agric. res.

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Copper-based chemicals are effectively used as antimicrobials in agriculture. However, with respect to its nanoparticulate form there has been limited number of studies. In this investigation, in vitro tests on effect of copper nanoparticles (CuNPs) against plant pathogenic fungi, oomycete, bacteria, beneficial microbes Trichoderma harzianum and Rhizobium spp., and wheat seeds were conducted. Integration of CuNPs with non-nano copper like copper oxychloride (CoC) at 50 mg/L concentration each recorded 76% growth inhibition of the oomycete Phytophthora cinnamomi in vitro compared to the control. CuNPs also showed synergistic inhibitory effect with CoC on mycelial growth and sporulation of A. alternata. Pseudomonas syringae was inhibited at 200 mg/L of CuNPs. CuNPs were not significantly biocidal against Rhizobium spp. and Trichoderma harzianum compared to CoC. Evaluation of the effect of CuNP on wheat revealed that rate of germination of wheat seeds was higher in presence of CuNPs and CoC compared to control. Germination vigor index, root length, shoot dry weight and seed metabolic efficiency of wheat were negatively affected. At low concentration, CuNPs promoted the growth of the plant pathogenic fungi Botrytis fabae, Fusarium oxysporum f.sp. ciceris, F.oxysporum f.sp. melonis, Alternaria alternate and P. syringae, and sporulation of T. harzianum. Synergistic effect of CuNPs and CoC in inhibiting P. cinnamomi offers a possibility of developing new fungicide formulation for better control of the oomycetes. Non-biocidal effect of CuNPs against beneficial microbes indicates its potential use in the agri-ecosystem.

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“…Myco-Sin®VIN was ineff ective to control grey mould in 2011, when rainfall period occurred in the end of April during strawberry fl owering, perhaps because it could be washed away from the leaf surface. This assumption is based on the experience of Michelante and Haine (2004) and Dorn et al (2007), who noted Myco-Sin (very similar product to Myco®Sin VIN) was eff ective to reduce Phytophthora infestans in potatoes in in vitro assay, but it showed signifi cantly lower effi cacy in fi eld conditions. The authors supposed the failure under fi eld conditions due to a lack of stability (sulfuric clay showed poor rainfastness) under prevailing environmental conditions and not to a lack of effi cacy.…”

Section: Discussionmentioning

confidence: 99%

“…In order to reduce or replace copper fungicides not only in organic production, sulfuric clays are tested to control pathogens (Dorn et al, 2007;Michelante and Haine, 2004). In organic growing sulfuric clays are successfully introduced into the protection strategies, mainly in apples (Jamar and Lateur, 2007;Jamar et al, 2010;Kelderer et al, 2010;Kunz et al, 2011;Falta and Vávra, 2010).…”

mentioning

confidence: 99%

Effect of Alginure® (seaweed extract), Myco-Sin®VIN (sulfuric clay) and Polyversum® (Pythium oligandrum Drechs.) on yield and disease control in organic strawberries

Boček¹,

Salaš²,

Sasková³

et al. 2013

Acta Univ. Agric. Silvic. Mendelianae Brun.

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BOČEK, S., SALAŠ, P., SASKOVÁ, H., MOKRIČKOVÁ, J.: Eff ect of Alginure® (seaweed extract), MycoSin®VIN (sulfuric clay) and Polyversum® (Pythium oligandrum Drechs.) on yield and disease control in organic strawberries. Acta univ. agric. et silvic. Mendel. Brun., 2012, LX, No. 8, pp. 19-28 In 2011 and 2012 three commercial products Alginure® (seaweed extract), Myco-Sin® VIN (sulfuric acid clay with yeast and plant extracts) and Polyversum® (spores of Pythium oligandrum) were tested in fi eld experiment with strawberry cv. 'Induka' under the conditions of organic growing system. The aim of the study was to determine the eff ect of the preparations on yield, fruit quality and diseases control. The preparations were applied fi ve times during fl owering. We assessed total yield, marketable and unmarketable yields, average fruit weight, grey mould incidence on fruits caused by Botrytis cinerea and leaf spot severity caused by Mycosphaerella fragariae. Effi cacy (%) of preparations was calculated. Preparations did not show positive eff ect on yields parameters. Total and marketable yields were not signifi cantly diff erent to untreated control in both years. Nevertheless considerable increase of yields from 2011 to 2012 was observed in strawberries treated by biofungicide Polyversum®. Preparations did not signifi cantly reduce the incidence of grey mould. Alginure® showed the best results by effi cacy 39.6 % and 57.4 %, respectively. All preparations provided very low, less than 10% effi cacy to control leaf spot severity.

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Control of late blight in organic potato production: evaluation of copper-free preparations under field, growth chamber and laboratory conditions

Cited by 54 publications

References 27 publications

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

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

In vitro effects of copper nanoparticles on plant pathogens, beneficial microbes and crop plants

Effect of Alginure® (seaweed extract), Myco-Sin®VIN (sulfuric clay) and Polyversum® (Pythium oligandrum Drechs.) on yield and disease control in organic strawberries

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