Occurrence and cross-infection ofPhytophthora infestanson hairy nightshade (Solanum sarrachoides) and potato (Solanum tuberosum) in Maine

Olanya, O. M.; Lambert, D. H.; Plant, Andrew B.

doi:10.1080/07060660509507246

Cited by 9 publications

(7 citation statements)

References 6 publications

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“…This was the time when late blight had already well established in commercial cultivation. In North America, Deahl et al (2004Deahl et al ( , 2006 and Olanya et al (2005) also noticed blighted wild Solanum species in the vicinity of already heavily blighted potato fields. We observed a remarkable dissimilarity in severity of attacks in 2006 and 2007 at Radboud University Experimental Garden and Genebank.…”

Section: Discussionmentioning

confidence: 99%

“…Besides S. nigrum and S. dulcamara, four other species of Solanaceae, Solanum physalifolium Rusby, Solanum sarrachoides Mill., Solanum villosum Lam., and Solanum sisymbriifolium Lam. (the latter species used as a trap crop for sanitation of fields infected by potato cyst nematode), are present in Europe and USA and may serve as an alternative host (Andersson and Johansson 2003;Flier et al 2003a;Olanya et al 2005). Other cultivated Solanaceae such as tomato (Solanum lycopersicum Mill.…”

Section: Introductionmentioning

confidence: 99%

“…(Fontem et al 2004), are also found infected by P. infestans. To prove the role of wild solanaceous species as an alternative host for late blight, it has been also attempted to confirm pathogenicity of P. infestans on wild hosts under laboratory conditions (Peterson 1947;Platt 1999;Cooke et al 2002;Andersson and Johansson 2003;Deahl et al 2004;Fontem et al 2004;Olanya et al 2005;Lebecka 2007). In these reports, however, the role of the plants as a source of primary infections or as main source of late blight presence was not fully confirmed.…”

Section: Introductionmentioning

confidence: 99%

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Role of Solanum dulcamara L. in Potato Late Blight Epidemiology

et al. 2010

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Four sites with naturally growing Solanum dulcamara were surveyed during 2006 and 2007 for the presence of late blight. Despite 2 years of observations, no late blight was detected among natural populations of bittersweet. Nevertheless, repeated infections occurred on few S. dulcamara plants from a collection growing in a botanical garden in the same years. These plants were used to investigate the possibility of survival of the inoculum between seasons. In the respective years, a set of 21 and 52 S. dulcamara accessions inoculated with Phytophthora infestans under field conditions resulted in a wide range of responses to the disease. More susceptible reactions were found among genotypes collected at greater distance from commercial potato fields indicating the possibility of genetic selection caused by P. infestans. However, both scarceness of natural infections and no overwintering, suggest that bittersweet may not play a role in late blight epidemiology.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Role of Solanum dulcamara L. in Potato Late Blight Epidemiology

et al. 2010

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“…Over the past 20 years, periodic occurrences of potato late blight have been observed in Maine producing various levels of disease intensity (Lambert et al 1998;Groves 2002;Johnson 2005;Olanya et al 2002Olanya et al , 2005Olanya et al , 2006Olanya et al , 2009. In Maine, the NOBLIGHT model, a modification of BLITECAST (Krause et al 1975) is used for making recommendations for the initiation of fungicide applications for the control of late blight and for subsequent applications of fungicidal compounds in potato fields (Johnson 2006).…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of SIMBLIGHT1 and SIMPHYT1 models for predictingPhytophthora infestansin north-eastern United States

Olanya

Honeycutt

Tschöepe³

et al. 2012

Archives Of Phytopathology And Plant Protection

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Accurate prediction of Phytophthora infestans outbreak in a cropping season is crucial for the effective management of late blight on potato. The SIMBLIGHT1, SIMPHYT1 and modified SIMPHYT1 models were assessed for predicting late blight outbreaks relative to NOBLIGHT model by using climatic and crop data from field experiments at Presque Isle, ME, from 2004 to 2009. The dynamics of late blight infection pressures were computed by SIMPHYT3 model to assess the conduciveness of environmental conditions for late blight infection and potential for disease development. Infection pressure indicated conditions were moderately conducive for late blight development but varied across years. The SIMPHYT1 model recommended fungicide applications and 2009, respectively. The modified SIMPHYT1 model (US-version) recommended similar fungicide application dates for the same years with the exception of 2007. Model simulations of disease outbreak differed from actual recorded observations in untreated plots by 24-65 days. Simulation of SIMBLIGHT1 based on high and low soil moisture conditions in the field resulted in vast differences in dates of first fungicide application. Validation of the models (differences in the number of days between recommendation of fungicide treatment and late blight outbreak) indicated a better goodness of fit for the models (intervals of 6-20 days from the start of fungicide application to first disease outbreak). The NOBLIGHT model was accurate in forecasting the timing of first fungicide applications for late blight control. Significant improvements in late blight predictions could result if these models were modified to account for external sources of inoculum, by combining weather-based forecasts with spore traps, disease detection methods or complimentary systems.

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“…Aggressiveness of P. infestans in potato or tomato has been extensively studied (4,8,14,22). However, less work has been done on aggressiveness of this pathogen on non-crop Solanaceae species (15,27,30).…”

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confidence: 99%

Can Weed Hosts Increase Aggressiveness of Phytophthora infestans on Potato?

Grönberg

Andersson²,

Yuen³

2012

Phytopathology®

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Potato late blight, caused by Phytophthora infestans, is a major disease in potato production throughout the world. In southern Sweden, hairy nightshade (Solanum physalifolium), an alternative non-crop host to the pathogen, is an increasing weed problem. Single-lesion leaves infected by P. infestans were collected from potato and hairy nightshade to determine phenotypic and genotypic population differentiation of P. infestans between the two hosts. Genotypic variation was estimated using microsatellites as markers. The results showed no genotypic differentiation in the samples between the two hosts. Aggressiveness tests were performed using the sampled isolates to cross-inoculate potato and hairy nightshade. The proportion of infected leaves, latency period, lesion growth rate, and sporulation capacity were measured. For isolates from hairy nightshade, the odds of infection were higher on both hosts combined. When tested on potato leaves, isolates from hairy nightshade showed a significantly shorter latency period and higher sporulation capacity compared with isolates from potato. This indicates that an alternative host can filter populations of P. infestans toward a higher aggressiveness, which could lead to increasing problems in controlling potato late blight.

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Occurrence and cross-infection ofPhytophthora infestanson hairy nightshade (Solanum sarrachoides) and potato (Solanum tuberosum) in Maine

Cited by 9 publications

References 6 publications

Role of Solanum dulcamara L. in Potato Late Blight Epidemiology

Role of Solanum dulcamara L. in Potato Late Blight Epidemiology

Effectiveness of SIMBLIGHT1 and SIMPHYT1 models for predictingPhytophthora infestansin north-eastern United States

Can Weed Hosts Increase Aggressiveness of Phytophthora infestans on Potato?

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