Karpuzda Tohum Kaynaklı Zamklı Gövde Çürüklüğü [Didymella bryoniae (Auersw.) Rehm (Syn. Mycosphaerella melonis (Pass.) Chiu & J. C. Walker)] Hastalığının Savaşımında İlaçlama Programlarının Etkinliğinin Araştırılması
Günümüzde sebze üretiminde aşılı fide kullanımı önemli bir yer tutmaktadır. Ülkemizde son yıllarda aşılı karpuz fidesi üretiminde ciddi ekonomik kayıplara neden olan Zamklı Gövde Çürüklüğü Hastalığı etmeni Didymella bryoniae’ye karşı ülkemizde etkili bir mücadele yöntemi ve ruhsatlı bir preparat kullanılmamaktadır. Bu çalışma kapsamında, in vitro koşullarda 5 farklı fungisitin 0.3, 1, 3, 10, 30, 100 µg/ml dozları, 4 D. bryoniae izolatının miselyal gelişimine etkileri belirlenmiştir. Daha sonra etmenin yapay olarak inokule edildiği bulaşık karpuz tohumlarının steril torfa, yine hastalık etmeninin yapay olarak bulaştırıldığı torfa da hastalıktan ari karpuz tohumlarının ekildiği 2 farklı tohum denemesi kurulmuş ve sera koşullarında 3 farklı preparat tohum ilaçlaması olarak uygulanarak etkinlikleri belirlenmiştir. Çalışmanın son aşamasında da in vitro’da etkili bulunan fungisitlerle bazı bitki aktivatörleri kombine edilerek 2 ayrı ilaçlama programı hazırlanmış ve sera koşullarında saksıda karpuz fidelerine uygulanmıştır. In vitro koşullarda kurulan denemede, en iyi sonucu
Anahtar Kelimeler:
Karpuz, Aşılı fide, Didymella bryoniae, Zamklı gövde çürüklüğü, tohum, bitki aktivatörü
Effıciency Of Fungicide Programs At Management of a Seed Born Disease Gummy Stem Blight [Didymella bryoniae (Auersw.) Rehm (Syn. Mycosphaerella melonis (Pass.) Chiu & J. C. Walker)] on Watermelon
In recent years, the usage of grafted seedling keeps an important place in vegetable production. In Turkey, there is no effective management way or registrated fungicide against to gummy stem blight, caused by Didymella bryoniae, cause to serious economical loses at the production of grafted watermelon seedling. In this study, the effects of 0.3, 1, 3, 10, 30, 100 µg / ml doses of 5 different fungicides on mycelial growth of 4 D. bryoniae isolates were determined under in vitro conditions. Afterward, 2 different seed trials were established in which the artificially inoculated watermelon seeds sown into sterile peat and disease-free watermelon seeds were sown in the artificially inoculated peat with the disease agent, and 3 different active ingredients were applied under greenhouse conditions and their effectiveness was determined. At the last stage of the study, 2 different spraying programs were prepared by combining some plant activators with fungicides which are found effective under in vitro conditions and applied to watermelon seedlings in pots under greenhouse conditions. In in vitro experiment, pyraclostrobin (12.8%) + boscalid (25.2%) with ED50 value of
Keywords:
Watermelon, grafted seedling, Didymella bryoniae, gummy stem blight, seed, plant defence activator,
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- ISSN: 0378-8024
- Yayın Aralığı: Yılda 3 Sayı
- Başlangıç: 1971
- Yayıncı: Türkiye Fitopatoloji Derneği