In vitro sensitivity of anthracnose disease agent, Colletotrichum gloeosporioides (Penz.) Penz. & Sacc., to some fungicides on lemon

Yıl 2019, Cilt: 59 Sayı: 1, 53 - 62, 29.03.2019

Aysun Uysal , Şener Kurt

https://doi.org/10.16955/bitkorb.471055

Cited By: 3

Öz

Anthracnose is one of the diseases that seriously
threaten citrus production, especially lemons in the world and in our country. The
aim of this study was to determine the sensitivity of an anthracnose disease
agent, Colletotrichum
gloeosporioides, on lemon, to some fungicides with different
mechanisms of action from different chemical groups such as DMI, SDHI, QoI,
amides, anilines and dithiocarbamates. For this purpose, tissue pieces of
diseased plants collected from lemon orchards were incubated in PDA medium at
25 °C for 5 days. All isolates were identified as Colletotrichum gloeosporioides as a result of morphological and
molecular diagnoses of fungal cultures. The virulence levels of all isolates were determined in
pathogenicity tests and the highest virulence was found to have LC5 isolate.
The susceptibility of C. gloeosporioides
LC5 isolate to 10 different fungicides was demonstrated by in vitro mycelial growth and conidial germination trials. As a
result, it was determined that fungicides fluopyram+tebuconazole, fluazinam,
fluxapyroxad+ difenoconazole and dithianon+phosphorous acid showed the highest
effect.

Anahtar Kelimeler

Lemon, Anthracnose, Colletotrichum, Fungicides, Sensitivity

Limonda Antraknoz hastalığı etmeni Colletotrichum gloeosporioides (Penz.) Penz. & Sacc.’in bazı fungisitlere karşı in vitro duyarlılığı

Öz

Antraknoz,
dünyada ve ülkemizde limon başta olmak üzere turunçgil üretimini ciddi düzeyde
tehdit eden hastalıklardan birisidir. Bu çalışmanın amacı, limonda
Antraknoz hastalığı etmeni Colletotrichum gloeosporioides’in DMI, SDHI, QoIs, amid, aniline ve
dithiocarbamate gibi farklı kimyasal gruplardan farklı etki mekanizmalarına
sahip bazı fungisitlere karşı duyarlılığını belirlemektir.
Bu
amaçla, limon bahçelerinden toplanan hastalıklı bitkilerin doku parçaları, PDA
besi yerinde 25 °C’de 5 gün inkübe edilmiştir. Fungal kültürlerin morfolojik ve
moleküler teşhisleri sonucunda tüm izolatların, Colletotrichum
gloeosporioides olduğu belirlenmiştir. Patojenisite denemelerinde tüm izolatların
virülenslik düzeyleri belirlenmiş ve en yüksek virülensliğe LC5 izolatının
sahip olduğu tespit edilmiştir. C. gloeosporioides LC5 izolatının 10 farklı fungisite karşı
duyarlılıkları, in vitro’da miselyal
gelişim ve konidiyal çimlenme denemeleri ile ortaya konmuştur. Sonuç olarak en
yüksek etkiyi, fluopyram+tebuconazole, fluazinam, fluxapyroxad+difenoconazole
ve dithianon+fosforoz asit fungisitlerinin gösterdiği belirlenmiştir.

Anahtar Kelimeler

Limon, Antraknoz, Colletotrichum, Fungisit, Duyarlılık

Kaynakça

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