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Öğe Determination of Application Time for Chemical Control of Fire Blight Disease in Pear Varieties(ANKARA UNIV, FAC AGR, 2010) Baştaş, Kubilay Kurtuluş; Maden, Salih; Katırcıoğlu, Y. Zekai; Boyraz, NuhFire blight, caused by the bacterium Erwinia amylovora, is a serious disease of pear, apple, and other plants of the Rosaceae family. In this study, from the point of view of continuousness of protection of fire blight disease and shoot growth in growing season, application times and effectiveness of host resistance inducers, harpin protein, benzothiadiazole, prohexadione-Ca as alternatives to conventional products, streptomycin, copper and maneb+copper were evaluated on susceptible pear varieties in greenhouse and field conditions. Type 1 and Type 2 applications for prevention of the disease and Type 3 and Type 4 applications for evaluation of shoot growth were performed. Type 2 application of harpin protein gave remarkable effectiveness on prevention of the disease about 49% and 65% in greenhouse and field, respectively. After Type 1 and 2 applications by prohexadione-Ca and benzothiadiazole, disease severity significantly decreased comparing to applications of copper and maneb+copper and, controls. Only prohexadione-Ca applications significantly reduced shoot lengths and plants were highly affected by the application Type 4 of this chemical. According to findings, applications of Type 2 provided better results than Type 1 on all of pear varieties in greenhouse and field conditions and use of resistance inducing substances during the production season is proposed in managing of shoot blight phase of fire blight disease.Öğe Determination of Application Time for Chemical Control of Fire Blight Disease in Pear Varieties(2010) Baştaş, Kubilay Kurtuluş; Maden, Salih; Katırcıoğlu, Y. Zekai; Boyraz, NuhFire blight, caused by the bacterium Erwinia amylovora, is a serious disease of pear, apple, and other plants of the Rosaceae family. In this study, from the point of view of continuousness of protection of fire blight disease and shoot growth in growing season, application times and effectiveness of host resistance inducers, harpin protein, benzothiadiazole, prohexadione-Ca as alternatives to conventional products, streptomycin, copper and manebcopper were evaluated on susceptible pear varieties in greenhouse and field conditions. Type 1 and Type 2 applications for prevention of the disease and Type 3 and Type 4 applications for evaluation of shoot growth were performed. Type 2 application of harpin protein gave remarkable effectiveness on prevention of the disease about 49% and 65% in greenhouse and field, respectively. After Type 1 and 2 applications by prohexadione-Ca and benzothiadiazole, disease severity significantly decreased comparing to applications of copper and manebcopper and, controls. Only prohexadione-Ca applications significantly reduced shoot lengths and plants were highly affected by the application Type 4 of this chemical. According to findings, applications of Type 2 provided better results than Type 1 on all of pear varieties in greenhouse and field conditions and use of resistance inducing substances during the production season is proposed in managing of shoot blight phase of fire blight disease.Öğe Evaluation of host resistance inducers and conventional products for fire blight management in loquat and quince(QUEBEC SOC PROTECT PLANTS, 2007) Bastas, Kubilay Kurtulus; Maden, SalihFire blight disease is one of the most destructive diseases of pome fruits. Due to the lack of effective, non-phytotoxic and publicly acceptable materials for controlling fire blight in pome fruit trees, new strategies to manage Erwinia amylovora fire blight are being sought. The resistance-inducing compounds prohexadione-Ca, harpin protein and benzothiadiazole (acibenzolar-S-methyl), the fertilizer humic acid, the bactericides streptomycin and copper salts, and combinations of copper with chemicals were evaluated for their ability to control fire blight on quince and loquat cultivars. Prohexadione-Ca was applied at a rate of 125 mg L-1 at two shoot lengths (6-12 cm and 15-20 cm), while benzothiadiazole + metalaxyl (135 mg L-1) and harpin (50 mg L-1) were applied when the shoots measured between 15-20 cm, and again at 30-35 cm. On loquat cv. Cukurgobek, benzothiadiazole + metalaxyl showed about 60% effectiveness. The addition of copper salts reduced the effectiveness of benzothiadiazole + metalaxyl. On quince cultivars, streptomycin (P <= 0.05) was the most effective treatment during both years, followed by the harpin protein alone and in combination with copper salts. Prohexadione-Ca, benzothiadiazole + metalaxyl, and harpin protein applications reduced disease severity on inoculated shoots compared with copper and untreated controls. Prohexadione-Ca reduced both shoot length and shoot blight on the two hosts. Humic acid applications were ineffective in controlling fire blight on loquat and quince cultivars. Quince cv. E me showed lower disease severity than cv. Ekmek (P <= 0.05). The use of resistance-inducing substances during the early phase of shoot growth may offer a means of managing the shoot blight phase of fire blight disease on quince and loquat.Öğe Mycoflora on Maize Cobs Infected by Ustilago maydis (DC) Corda(Selçuk Üniversitesi, 2018) Aydoğdu, Mehmet; Boyraz, Nuh; Maden, SalihUstilago maydis (DC) Corda, the causal agent of maize smut disease, can formenormous galls on cobs and cause significant yield losses under favorableconditions. In addition to yield losses, U. maydis may have an influence on thekernel quality in smutted cobs. The aim of this study was to determine presence of mycoflora on the cobs infected by U. maydis. A 2-year field experimentwas conducted in Antalya Province. In the study, some maize cultivars belonging to various maize variety groups including dent corn, flint corn, sweet cornand popcorn were used as host plants. Inoculations were performed by injecting inoculum into ear silk of each cob of the plants in inoculated plots. Foreach treatment, control plots were also set up. When the kernels of cobs incontrol plots were mature enough to harvest, kernel samples in inoculated plotswere taken from smutted cobs and investigated in terms of fungal flora. A totalof 6 genera (Paecilomyces, Aspergillus, Penicillium, Acremonium, Fusarium,Rhizopus) were detected from the kernels in the smutted cobs. However, frequently isolated species were Aspergillus fumigatus, A. niger, A. parasiticus(A. flavus), Paecilomyces lilacinus, Penicillium citrinum, Fusarium solani, F.oxysporum and Rhizopus stolonifer. The most frequently isolated genus wasAspergillus (31.4%), while the lowest one was Penicillium (6.4%). The studyshowed that U. maydis may affect kernel quality of maize by harboring somefungal microorganisms in smutted cobs.Öğe A New Approach to Fire Blight Control: Mycorrhiza(Amer Soc Horticultural Science, 2006) Bastas, Kubilay Kurtulus; Akay, Aysen; Maden, SalihThe first outbreak of fire blight incited by Erwinia amylovora (Burr.) Winslow et al. occurred on pome fruits in Turkey in 1985, and it is now one of the most serious diseases of pear, apple, quince, and loquat (Oktem and Benlioglu, 1988). In this study, experiments were conducted in Konya Province to evaluate the efficacy of Glomus intraradices Schenck & Smith vesicular-arbuscular mycorrhiza (VAM) and bactericides for control of the shoot blight phase of fire blight and control of shoot growth on the different apple cultivars (Gala, Red Elstar, Pinova, Jonagored) on M9 rootstock in 2002 to 2003. Streptomycin provided 84.38% to 95.24% and 85.28% to 89.97% disease control in 2002 and 2003, respectively. Copper complex was not so effective against shoot blight phase of the disease, and it reduced disease by 16.18% to 27.75% and 14.48% to 19.06% in 2002 and 2003, respectively. Results of VAM application were encouraging, indicating a reduction of fire blight by Glomus intraradices of between 9.7% and 50.5% in 2002 and between 23.9% and 48.4% in 2003, respectively.
