geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Occurrence of Sclerotinia rot on composite vegetable crops and the causal Sclerotinia spp


, : Occurrence of Sclerotinia rot on composite vegetable crops and the causal Sclerotinia spp. Mycobiology 30(1): 41-46, March

Composite vegetable crops grown in greenhouses and open fields in Korea were surveyed from 1995 to 1999. Occurrence of Sclerotinia rot was observed in 123 of 277 lettuce fields, in 11 of 18 head lettuce fields, in 12 of 14 endive fields, and in 4 of 38 garland chrysanthemum fields surveyed during the growing seasons. The disease most severely occurred up to 80% on lettuce. Incidence of the disease was as high as 20% at its maximum on endive and garland chrysanthemum but relatively low on head lettuce. Symptoms of the disease developed on leaves of all the composites, crowns of lettuce and head lettuce, and stems of garland chrysanthemum. Out of 240 isolates of Sclerotinia species obtained from the diseased composites, 169 isolates were identified as Sclerotinia sclerotiorum, and the others as S. minor based on their morphological and cultural characteristics. S. sclerotiorum was isolated from all the composites, and S. minor only from lettuce and endive. Eight isolates of S. sclerotiorum and four isolates of S. minor were tested for their pathogenicity to the composites by artificial inoculation. All the isolates of the two Sclerotinia spp. induced rot symptoms on the plants of the composites by artificial inoculation, which were similar to those observed in the fields. The pathogenicity tests revealed that there is no significant difference in virulence of the isolates to the composites and in susceptibility of the composites to the isolates.

US$29.90


Other references

Jackson, L.P., 1962: Effects of soil water & temperature on the growth of potato sets. Potato sets were kept in saturated soil at temperatures ranging from 50 to >100 degrees F. Potato sets at 50 degrees F sprouted until the 3rd day of submergence; at temperatures of 65 degrees F or more there was complete loss ot sets flooded fo...

Iannini, B.; Poppi, M.; Ridomi, A.; Pezza, L., 1975: The behaviour of various rootstocks assessed from measured biometric and physiological characteristics. I, II. Differences in development and physiology were found among the 5 grapevine rootstocks examined (Kober 5BB, 420 A, 1103 P, 140 R and 3309 C) in a mother plant nursery. Thus for each there was a specific level of pruning which corresponded to the op...

Glenn, J.K.; Hicks, L.L.; Daugird, A.J.; Lawhorne, L.W., 1988: Necessary conditions for supporting a general surgeon in rural areas. Loss of a general surgeon in a rural community cna alter the referral patterns, the image and utilization of the local hospital, and even the market share of local primary care physicians. Prior research has not defined the necessary and/or suffic...

Hough, G.A.len, J., 1993: Homopsis-infected lupin seed can be fed to dairy cattle. Journal of agriculture4(3): 118-119

Knight, Harry H., 1931: Two new species of Macrotylus Fieber from the western United States. M. polymonii [misspelling for polemonii] (p. 79), Washington, on Polemonium humile, type in author's coll.; M. vanduzeei (p. 80). California, on sage, type in California Acad. Sci.

Sherman D.M.; Didenko V.I., 1982: Effect of lactosol infusions on the course and outcomes of experimental traumatic shock. Marked positive effects of lactosol infusions on the course and outcome of traumatic shock was demonstrated in acute experiments of 83 adult dogs. The survival and life span of the animals depends on the volume of the infused solution and the peri...

Takeda, S.; Kamatani, A.; Kawanobe, K., 1995: Effects of nitrogen and iron enrichments on phytoplankton communities in the northwestern Indian Ocean. Nutrient-enrichment bottle experiments in the northwestern Indian Ocean surface waters were conducted to investigate phytoplankton growth following enrichments with either NH4+, NO3, Fe or Fe + NO3. Stimulation of phytoplankton growth could be ach...

Datsis, A.G., 1972: Origin of renal papillary droplets in pyridoxine deficiency. The morphology of droplet formation has been described in NAR 30, 3378. Details are now given of electron micrography of the cytoplasm of tubular cells of the renal papilla showing changes that occur in rats depleted of vitamin B-6 for 3 weeks.

Ankerl, G.G., 1982: Migration from rural to urban habitat in Tropical Africa (1970-2000). Problems associated with rural-urban migration in Tropical Africa are examined, with particular reference to the experience of Ghana, Kenya, Nigeria, Tanzania, and Zaire. The problems examined include overurbanization, maldistribution of populatio...

Paans, A.M.; Rosenqvist, G.; Holte, S.; Eriksson, L.; Dahlbom, M.; Bohm, C., 1989: Scatter fraction: measurement and correction. The concept of scatter in Positron Emission Tomography is reviewed regarding origin and influence on data. Different ways to measure and correct for scatter are discussed.