Türk Tarım ve Doğa Bilimleri Dergisi

Yazarlar: Oktay ERDOĞAN, Şener KURT, M. Erhan GÖRE

Konular:-

Anahtar Kelimeler:Cotton,Verticillium dahliae Wilt,Inoculation methods,Disease severity

Özet: Verticillium wilt caused by Verticillium dahliae Kleb. is the most serious disease of cotton plant. The most effective method against the disease is to develop resistant/tolerant cotton cultivars. This study was performed to determine inoculation methods providing uniform and reliable results on breeding programs to Verticillium wilt in the growth chamber. The experiment was carried out in a randomized plot design with 6 replications. Cultivars Giza 45 (resistant), Carmen (tolerant), Acala SJ2 (susceptible), Çukurova 1518 (susceptible) were used. Isolates PYDV6 (pathotype-T1) and Vd 11 (pathotype-SS4) with stem injection and conidial suspension inoculation methods were applied. The disease severity values were higher in stem injection method than the conidia suspension method. When both pathotypes PYDV6 and Vd 11 were applied at the same time, Giza 45 (0.17-0.35) had the lowest disease severity, and these values were higher in stem injection (0.38-0.63) than conidia suspension method. Acala SJ2 (2.73-3.18) and Çukurova 1518 (2.30-2.83) had the highest disease severity in the stem injection and the lowest disease severity (2.40-2.80/2.11-2.41) in the conidia suspension. It was concluded that stem injection in determining the pathogen virulence and conidial suspension in breeding programs would be the most appropriate methods for obtaining uniform results.

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