Effect of a combination of chlorine dioxide and thiophanate-methyl pre-planting seed tuber treatment on the control of black scurf of potatoes

2006 ◽  
Vol 25 (12) ◽  
pp. 1231-1237 ◽  
Author(s):  
Deena Errampalli ◽  
Rick D. Peters ◽  
Kathy MacIsaac ◽  
Danny Darrach ◽  
Peter Boswall
Keyword(s):  
Chlorine Dioxide ◽  
Seed Tuber ◽  
Black Scurf ◽  
Thiophanate Methyl ◽  
Tuber Treatment

Biocontrol of black scurf on potato by seed tuber treatment with Pythium oligandrum

2012 ◽  
Vol 60 (3) ◽  
pp. 297-304 ◽  
Author(s):  
Sachiko Ikeda ◽  
Ayano Shimizu ◽  
Motoshige Shimizu ◽  
Hideki Takahashi ◽  
Shigehito Takenaka
Keyword(s):  
Seed Tuber ◽  
Black Scurf ◽  
Pythium Oligandrum ◽  
Tuber Treatment

scholarly journals Management of Black Scurf (Rhizoctonia solani) of Potato through Organic Approaches

2020 ◽  
Author(s):  
Narendra Singh ◽  
Vikee M. Patel
Keyword(s):  
Boric Acid ◽  
Rhizoctonia Solani ◽  
Tuber Yield ◽  
Disease Incidence ◽  
Organic Amendments ◽  
Black Scurf ◽  
Economic Losses ◽  
Research Station ◽  
Diseased Tuber ◽  
Tuber Treatment

Black scurf (Rhizoctonia solani) disease of potato is becoming prominent in many potato growing districts of Gujarat state which reduce quality and market value of the produce, resulting in economic losses. The field experiment was conducted during rabi season of 2014-15 in naturally infested field with scurf pathogen at Potato Research Station, S.D. Agricultural University, Deesa (Gujarat) with the objective to find out suitable management strategies for black scurf through organic approaches (bio-agents and organic amendments). Among different bio-agents (Trichoderma viride, T. harzianum. Pseudomonas fluorescens and Bacillus subtilis) tested against black scurf, the tuber treatment with 2 per cent boric acid spray along with tuber treatment with T. viride @ 10 g/kg seed before sowing recorded the lowest disease incidence (15.33 %) and index (0.38) with highest total tuber yield (324.68 q/ha) with maximum income `2,57,414/ha. When price computed with healthy and diseased tuber yield among treatments, the maximum income variation was (`92,986/ha) recorded by the same treatment followed by the tuber treatment with 3 % boric acid spray before sowing (`68,440/ha). In case of various organic amendments tested, soil application of mustard cake @ 10 q/ha registered minimum disease incidence (37.33 %) and disease index (0.66) as compared to rest of the organic treatment with highest total tuber yield (`327.20 q/ha) with maximum income `2,65,010/ha. When price computed with healthy and diseased tuber yield among treatments, the maximum income variation was (`1,12,990/ha) recorded by the same treatment followed by the neem cake @ 10 q/ha (`56,660/ha). These organic treatments can provide an effective and economical management of black scurf of potato for cultivaters.

scholarly journals Potato Silver Scurf Affected by Tuber Seed Treatments and Locations, and Occurrence of Fungicide Resistant Isolates of Helminthosporium solani

Plant Disease ◽  
2007 ◽  
Vol 91 (3) ◽  
pp. 315-320 ◽  
Author(s):  
Brad Geary ◽  
Dennis A. Johnson ◽  
Philip B. Hamm ◽  
Steve James ◽  
Ken A. Rykbost
Keyword(s):  
Seed Tuber ◽  
Disease Incidence ◽  
Geographic Origin ◽  
Small Scale ◽  
Silver Scurf ◽  
Helminthosporium Solani ◽  
Columbia Basin ◽  
Thiophanate Methyl ◽  
First Report ◽  
Production Area

The effectiveness of various seed-tuber treatments was evaluated for control of silver scurf on potato (Solanum tuberosum), caused by Helminthosporium solani, at four locations in Washing-ton and Oregon using seed-tubers from the same source. Disease incidence was determined at harvest and following storage, and differed significantly among locations. The highest incidence of disease was observed at Redmond, OR and the lowest was at Hermiston, OR. Significantly less silver scurf occurred on progeny-tubers, regardless of location, when seed was treated with the fungicide treatments fludioxonil, fludioxonil + quintozene, azoxystrobin, or thiophanate-methyl + mancozeb compared with the nontreated control. A sample of H. solani from seed planted in the Columbia Basin of Washington and Oregon was assessed for resistance to thia-bendazole (TBZ) and thiophanate-methyl (TPM). Sensitivity of 20 isolates of H. solani to TBZ was determined on V8 media amended with TBZ. Four isolates, selected as a subset from the 20 isolates tested for TBZ sensitivity, were tested for resistance to TPM, mancozeb, and TPM + mancozeb on amended V8 media. Isolates differed significantly in sensitivity to both chemicals. Thirteen isolates out of the 20 tested were resistant to TBZ. One out of the four subsets of isolates was resistant to both TBZ and TPM. TBZ sensitivity was not related to geographic origin of the isolates. Variation in resistance was evident on a small scale as seen with one resistant and one sensitive isolate collected from the same tuber. This is the first report that silver scurf incidence is affected by location despite the same tuber-seed source and also the first report of TBZ and TPM resistant isolates of H. solani from the Columbia Basin (Oregon and Washington) production area.

Effect of Seed Tuber Treatment in Controlling Late Blight of Potato

2003 ◽  
Vol 2 (3) ◽  
pp. 157-160
Author(s):  
M.M. Rahman ◽  
K.M. Khalequzzaman . ◽  
T.K. Day . ◽  
M.A. Rahman . ◽  
Md. Kalim Uddin .
Keyword(s):  
Late Blight ◽  
Seed Tuber ◽  
Tuber Treatment ◽  
Late Blight Of Potato

scholarly journals ASSESSMENT OF THE IMPACT OF VERMICOMPOST AND PEAT EXTRACTS ON NUTRIENT ACCUMULATION IN TUBERS AND POTATO YIELD

2018 ◽  
Author(s):  
Lidija VOJEVODA ◽  
Anita OSVALDE ◽  
Gunta ČEKSTERE ◽  
Andis KARLSONS
Keyword(s):  
Field Experiments ◽  
Foliar Application ◽  
Seed Tuber ◽  
Solanum Tuberosum L ◽  
Foliar Spray ◽  
Mineral Nutrient ◽  
Research Centre ◽  
Potato Tubers ◽  
The Impact ◽  
Tuber Treatment

Investigations on the potential beneficial effect of humic substances on crop plant cultivation under extremely diverse soil and climatic conditions is of global character, thereby knowledge obtained on the basis of local investigations are of great importance world-wide. The aim of the research was to evaluate the effect of different application methods (seed tuber treatment and foliar application) of commercially-produced peat and vermicompost extracts on nutrient uptake in tubers and yield of potato (Solanum tuberosum L.) using field experiments in organic farming system with potato variety ‘Borodjanskij Rozovij’. The tested extracts from the organic products included: peat extract (K45) and vermicompost extract (B45) obtained at +45°C by cavitation. The investigation was carried out at Stende Research Centre (Institute of Agro-resources and Economics) from 2011 to 2012. The chemical composition (N, P, K, Ca, Mg, S, Fe, Mn, Zn, Cu, Mo, B) of potato tubers was determined. The application of organic extract from vermicompost had a stimulating effect on mineral nutrient as N, P, K, Mg, and S accumulation in potato tubers, but 50% of cases showed reduction in Ca and Cu content that could influence the storage of tubers. The use of peat extract was significantly effective when the tubers were treated before planting. On average, tuber treatment and foliar spray with organic extracts contributed to 10% of tuber yield increase.

Influence of soil fumigation and seed tuber treatment on the control of Rhizoctonia solani on potatoes

1996 ◽  
Vol 36 (3) ◽  
pp. 339 ◽  
Author(s):  
TJ Wicks ◽  
B Morgan ◽  
B Hall
Keyword(s):  
Rhizoctonia Solani ◽  
Field Experiments ◽  
Seed Tuber ◽  
South Australia ◽  
Soil Fumigation ◽  
Marketable Yield ◽  
Treated Seed ◽  
Low Levels ◽  
Tuber Treatment ◽  
Metham Sodium

Five field experiments were conducted in South Australia to determine the effect of soil fumigation (metham sodium) and chemical and biological seed tuber dressing on the severity of Rhizoctonia solani on potato stems and tubers. These experiments indicated that both soil- and tuber-borne inoculum must be considered in any program aimed at controlling R. solani. Tuber treatments of either a 20 min dip in 2% formaldehyde, sprays with pencycuron (0.15 mL a.i./10 kg seed), iprodione (2 mL a.i.110 kg seed) or a spore suspension of lo6 spores/ml of Verticillium biguttatum or a dust with tolclofos methyl (4 g a.i.110 kg seed) were most effective if planted in soil fumigated with 500 L/ha metham sodium or soil with low levels of R. solani. A commercial formulation of Trichoderma harziannum and T. koningii applied as a dust at 1.3 g110 kg seed was in most cases ineffective when treated seed was planted into either fumigated or unfumigated soil. The incidence of progeny tubers with sclerotia varied between sites and ranged from 85% in an unfumigated soil planted with infected tubers to 2% in a fumigated soil planted with pencycuron-treated tubers. Except for 1 experiment where tubers were harvested early, neither seed treatments nor fumigation improved total nor marketable yield.

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