Optimum Sample Size for Determining Disease Severity and Defoliation Associated with Septoria Leaf Spot of Blueberry
نویسندگان
چکیده
منابع مشابه
Septoria-like pathogens causing leaf and fruit spot of pistachio
Several species of Septoria are associated with leaf and fruit spot of pistachio (Pistacia vera), though their identity has always been confused, making identification problematic. The present study elucidates the taxonomy of the Septoria spp. associated with pistachio, and distinguishes four species associated with this host genus. Partial nucleotide sequence data for five gene loci, ITS, LSU,...
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Septoria centellae associated with leaf spot of Centella asiatica is reported for the first time in Korea. The fungus is described and illustrated in detail. It is also compared with related species of Septoria present on Centella and Hydrocotyle spp. with taxonomic comments. Two monoconidial isolates from Jeju and Wando were successfully cultured and have been deposited in the Korean Agricultu...
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Virzi (1992), Nielsen and Landauer (1993), and Lewis (1994) have published influential articles on the topic of sample size in usability testing. In these articles, the authors presented a mathematical model of problem discovery rates in usability testing. Using the problem discovery rate model, they showed that it was possible to determine the sample size needed to uncover a given proportion o...
متن کاملthe first report of stenotrophomonas sp. associated with canker and leaf spot disease of stone fruits in iran
department of plant protection, faculty of agriculture, vali-e-asr university of rafsanjan. *.corresponding author, [email protected] in september of 2012 some bacterial strains were isolated from peach (prunuspersica),apricot (prunusarmeniaca)and sour cheery (prunuscerasus)trees with leaf spot, canker and dieback symptoms on twig and stem in alborz province. the symptoms were similar to tho...
متن کاملHyperspectral Imaging for Determining Pigment Contents in Cucumber Leaves in Response to Angular Leaf Spot Disease
Hyperspectral imaging technique was employed to determine spatial distributions of chlorophyll (Chl), and carotenoid (Car) contents in cucumber leaves in response to angular leaf spot (ALS). Altogether, 196 hyperspectral images of cucumber leaves with five infection severities of ALS were captured by a hyperspectral imaging system in the range of 380-1,030 nm covering 512 wavebands. Mean spectr...
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ژورنال
عنوان ژورنال: Plant Disease
سال: 2006
ISSN: 0191-2917,1943-7692
DOI: 10.1094/pd-90-1209