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Tahıllarda Bakteriyel Çizgi ve Kara Kabuk Hastalığı - Bitki Koruma Etmen: Xanthomonas translucens pv. translucens Bakteriyel Çizgi ve Kara Kabuk hastalığının etmeni Xanthomonas translucens ’dir. Tahıllarda en çok görülen bu bakteriyel hastalık dünya üzerinde tahıl üretimi yapılan bölgelerin hemen hemen hepsinde görülür. Patojen buğday, arpa, çavdar ve birçok ota zarar verir. Bitkinin toprak üstü bölümünün hepsi etkilenebilir ancak bu hastalık genel olarak yapraklarda ve kavuzlarda etkilidir.
Patojen yapraklara ve gövdeye saldırdığında hastalık Bakteriyel Çizgi olarak tanımlanır. İlk belirtiler küçük çizgisel, açık kahverengi ıslak lekelerdir. Hastalığın ilk aşamasında lezyonlar damarlar arasında uzunlamasına gelişim eğilimi gösterirler. Fakat ileriki safhalarda gri-kahverengi lekeler halinde yaprak üzerine dağınık şekilde yayılırlar. Yüksek nemde lezyonlar üzerinde sarı renkte bakteriyel damlalar oluşur. Bu sızıntı kuruduğu zaman yaprak yüzeyinde küçük sarı tanecikler ve parlak yapılara dönüşür. Hastalık daha sonra yaprak saplarına ve gövdeye yayılır. Gövdede kararma ve zayıflamaya neden olur.
Hastalık başakları ve başağın bitkiye bağlandığı boyun kısmını etkilediği zaman Kara Kabuk olarak adlandırılır. Kara kabuk hastalığı kavuz ve kapçık üzerinde koyu ıslak çizgiler şeklinde kolaylıkla fark edilebilir. Genelde belirtiler ilk olarak kavuzların üst parçalarında ortaya çıkar. Hastalık ilerlediğinde lekeler birleşir, danenin kavuzunda ve diğer kısımlarında kararmalar oluşur.
Hastalık genellikle kahverengi nekroz ve kavuz yanığı hastalığı ile karıştırılır. Pseudomonas striafaciens ’in yulafta sebep olduğu bakteriyel çizgi hastalığının simptomları Xanthomonas translucens ’in simptomlarına benzerlik gösterir.
buğday başaklarında ki belirti 16824392468_5e7f002cc0_b
buğday başaklarında ki belirti-2 16804751767_8cb8c29e42_b
Buğday saplarında ki belirti 17012152655_4073dce044_b
buğday yapraklarında ki belirti 16825946949_fac08af87c_b
Buğdayda hastalığın genel görünümü 17011282191_679f0306a6_b
Arpada ki belirti 17011260471_b7a8eb374e_b
Bakterinin genel görünümü 16392019083_1ed1b0148f_b
Yazılarımızdan haberdar olmak için Abone olmak istermisin ? Kaliteli yazılarımız ve fotoğraflarımızdan ilk sizin haberiniz olsun !
Bitki koruma ailesine katıldığınız için teşekkür ederiz.
Bir şeyler yanlış gitti sanırım 🙁
Ne zaman fark edebiliriz acaba ? Zararlılar ve hastalıklar ile mücadele ettiğimizi zannedip, önümüze konulan bir besinin sadece kimyasaldan ibaret kansorejen bir madde olduğunu...
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Domateste bakteriyel benek hastalığı (Pseudomonas syringae pv. tomato)
Bakla bitkisinde yaprak leke hastalığı (Ascochyta fabae)
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