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Öğe Effect of some organic amendments on onion bulb rot(Priel Publ, 2002) Özer, N; Köycü, ND; Mirik, M; Soran, H; Boyraz, DThe effect of soil amended with stalks of sunflower (Helianthus annuus L.), alfalfa (Medicago sativa L.) and Hungarian vetch (Vicia pannonica Crantz) on onion bulb rot caused by Fusarium oxysporum Schlecht. Esp. cepae (Hanz.) Snyder Hansen and Aspergillus niger v. Tieghem was tested in a soil naturally infested with the pathogens under field conditions. All treatments significantly reduced bulb rot incidence. The fungal and antibacterial populations varied among all of the amended tested soils. Heterotrophic fungal populations were more effective than heterotrophic bacterial populations in the suppression of disease. The highest population of fungal microflora was found in plots amended with sunflower stalks. The carbon-to-nitrogen ratio and available moisture content of amended soils have an indirect suppressive role on disease, by increasing the heterotrophic fungal population.Öğe Fire blight of pome fruits and search for resistant or tolerant cultivars in Amasya and Tokat regions in Turkey(International Society Horticultural Science, 1999) Çitir, A; Mirik, MHaving a number of wild and local varieties of pears, apples and quinces, Amasya and Tokat have a great potential for the pome fruit production in Turkey. Destructive bacterial fire blight disease caused by Erwinia amylovora (Burr.) Winslow et al. was introduced by bringing honey bee hives from Samsun to Gokhoyuk State Farm in Amasya in 1988. Since then infection has destroyed orchards of pears and quinces year by year with an increasing rate. In 1997 the orchards of pome fruits in ail the districts of Amasya except Gumushacikoy and Hamamozu were infected with disease. Despite of the late contamination to Tokat, orchards of pome fruits in the districts of Pazar, Turhal, Yesilyurt and Zile as well as Central district were infected with the total rate of 14.42 % by the fire blight. Standard commercial varieties of pears and quinces were determined much more susceptible to infection than wild local cultivars. Especially late varieties of pears in Tokat area were noticedto be much more resistant to infection than others. Among the apple varieties early commercial cultivars were determined more susceptible to the pathogen than the others.Öğe Occurrence of bacterial fruit blotch of watermelon caused by Acidovorax avenae subsp citrulli in the eastern Mediterranean Region of Turkey.(Amer Phytopathological Soc, 2006) Mirik, M; Aysan, Y; Sabin, F[Abstract Not Available]