Fumigation of bulk-stored potatoes with 2-aminobutane for control of gangrene, skin spot and silver scurf diseases

1973 ◽  
Vol 16 (3) ◽  
pp. 234-243 ◽  
Author(s):  
D. C. Graham ◽  
G. A. Hamilton ◽  
M. J. Nash ◽  
J. H. Lennard
Keyword(s):  
Silver Scurf ◽  
Skin Spot

Use of 2-aminobutane as a fumigant for control of gangrene, skin spot and silver scurf diseases of potato tubers

1973 ◽  
Vol 16 (2) ◽  
pp. 109-125 ◽  
Author(s):  
D. C. Graham ◽  
G. A. Hamilton ◽  
C. E. Quinn ◽  
A. D. Ruthven
Keyword(s):  
Silver Scurf ◽  
Potato Tubers ◽  
Skin Spot

Occurrence, development, and losses associated with silver scurf and black dot on Colorado potatoes

1979 ◽  
Vol 56 (6) ◽  
pp. 289-306 ◽  
Author(s):  
Robert M. Hunger ◽  
Gary A. McIntyre
Keyword(s):  
Silver Scurf ◽  
Black Dot

scholarly journals Occurrence and epidemiological aspects of potato silver scurf in California

2004 ◽  
Vol 22 (4) ◽  
pp. 690-695 ◽  
Author(s):  
Marcos G. Cunha ◽  
David M. Rizzo
Keyword(s):  
Storage Period ◽  
Storage Conditions ◽  
Silver Scurf ◽  
Inoculum Potential ◽  
Helminthosporium Solani ◽  
Potato Tubers ◽  
Commercial Potato ◽  
Tuber Disease ◽  
Fusarium Sp ◽  
Over Time

A new potato tuber disease has been observed in the Tulelake region, California, USA, since 1995, with tuber symptoms suggestive of silver scurf disease (Helminthosporium solani). In this work we isolated, identified and demonstrated the nature of the causal agent of this potato disease in California. In addition, the distribution of H. solani in potato fields and the inoculum potential at harvest time were investigated. Disease progress and H. solani spore populations were also characterised under commercial storage conditions. The main fungal genera associated with potato tubers in storage were Helminthosporium solani, Colletotrichum sp., Fusarium sp., and Rhizoctonia sp. The results of Koch's postulates indicated that H. solani is responsible for the outbreak of silver scurf in the Tulelake region. In a disease survey in three commercial potato fields naturally infested, H. solani infections occurred in all fields. However, the extension of the infections differed significantly between the fields. During potato storage, silver scurf usually increased over time. The percentage of the tuber surface covered by silver scurf varied from 3.5% up to 35.5% during the storage period. The number of H. solani lesions per tuber also progressively increased from 6% up to 35%, six months after storage. H. solani spore populations also increased over time in all studied potato stores; nevertheless, they followed no consistent pattern, exhibiting multiple and variable peaks of increase and reduction during the period of storage.

Embellisia hyacinthi. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
J. C. David
Keyword(s):  
North America ◽  
The Netherlands ◽  
Geographical Distribution ◽  
Plant Debris ◽  
Skin Spot ◽  
Scilla Sibirica ◽  
Hyacinthus Orientalis

Abstract A description is provided for Embellisia hyacinthi. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Hyacinthus orientalis, Freesia refracta, Scilla sibirica, Muscari sp. DISEASE: Skin spot of bulbs. Leaf lesions also occur as spots. above which the leaves yellow and die. GEOGRAPHICAL DISTRIBUTION: Europe: Germany, The Netherlands, UK. North America: USA. TRANSMISSION: The fungus overwinters in the plant debris, soil and infected bulbs.

scholarly journals Evaluation of Fungicides Applied Via Drip Irrigation for Control of Silver Scurf on Potato in Western Washington

2015 ◽  
Vol 4 (1) ◽  
pp. 84
Author(s):  
McMoran D. W. ◽  
Buller S. J.
Keyword(s):  
Drip Irrigation ◽  
Washington State ◽  
Silver Scurf ◽  
State University ◽  
Potato Tubers ◽  
Washington State University ◽  
Mount Vernon ◽  
Loam Soil ◽  
Western Washington ◽  
Important Disease

Silver scurf is an economically important disease on potato tubers caused by Helminthosporium solani. Two studies were established near Mount Vernon, WA at Washington State University NWREC on 20 May 2011 and 21 May 2012 in Skagit silt loam soil.  Five treatments included: penthiopyrad applied at 45 days after planting (dap), penthiopyrad applied at 60 dap, azoxystrobin (Quadris; 9 oz/acre) applied at 45 dap, and azoxystrobin applied at 60 dap, and a non-treated non-irrigated control.  This study did not control for the effect of irrigation, as azoxystrobin- and penthiopyrad-treated plots were drip-irrigated while non-treated plots were not irrigated. The results of this study are therefore limited but do suggest a reduction in silver scurf incidence and severity with no significant impact on yield of potatoes when treated fungicide applied through drip irrigation systems.

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