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Determination of the effect of fosetyl Al against citrus gummosis disease caused by Phytophthora citrophthora (smith and smith) leonian

In this study the effect of fosetyl-Al against citrus root not and gummosis caused by Phytophthora citrophthora was investigated. The results showed that fosetyl-Al protected citrus from the disease at least for one year. It was found that two fungicide applications sufficiently protected the trees against citrus gummosis. | Tr. J. of Agriculture and Forestry 23 (1999) 419-424 © TÜBİTAK Determination of the Effect of Fosetyl-Al Against Citrus Gummosis Disease Caused By Phytophthora citrophthora (Smith and Smith) Leonian Ali ERKILIÇ, Yeter CANIHOŞ Çukurova Üniversitesi, Ziraat Fakültesi Bitki Koruma Bölümü Balcalı, Adana-TURKEY Received: 05.05.1998 Abstract: In this study the effect of fosetyl-Al against citrus root not and gummosis caused by Phytophthora citrophthora was investigated. The results showed that fosetyl-Al protected citrus from the disease at least for one year. It was found that two fungicide applications sufficiently protected the trees against citrus gummosis. No significant differences were obtained were obtained at two fungiciede dosages, 160 g a.i./100L and 200 g a.i./100L, in all applications. When the pathogen was inoculated two weeks before fosetyl-Al, the infection area was diminished and with time had complete recovery with callus formation. Thus, fosetylAl was shown to have a curative effect as well as a protective effect on citrus gummosis. Key Words: citrus, citrus root rot and gummosis, fosetyl-Al, induced resistance. Turunçgillerde Zamklanma Hastalığı (Phytophthora citropthora (Smith and Smith) Leonian)’na Karşı Fosetyl-Al’un Etkisinin Belirlenmesi Özet: Bu çalışmada turunçgillerde zamklanma ve kök çürüklüğü etmeni Phytophthora citrophthora’a karşı fosetyl-Al’un etkinliği araştırılmıştır. Deneme sonuçları fosetyl-Al’un turunçgil ağaçlarını en az bir yıl süreyle hastalıktan koruduğunu göstermiştir. Bu fungisitin iki kez uygulamasının ağaçları zamklanma hastalığına karşı etkin bir şekilde koruduğu bulunmuştur. Fungisitin iki uygulama dozu, 160 g a.i./100L and 200 g a.i./100L arasında hastalık üzerine etki yönünden önemli bir farklılık bulunmamıştır. Patojen inokulasyonunun fosetyl-Al uygulamasından iki hafta önce yapıldığı zaman infeksiyon alanının azaldığı ve zamanla kallus gelişimi ile kapandığı görülmüştür. Bu da fosetyl-Al’un turunçgil zamklanma .