Determination of the Resistance of Ascochyta rabiei to Some Commercial Fungicides in Chickpeas

Öz

The resistance of the commonly used fungicides Nativo®, Bellis®, Altis® Premier, Thiovit Jet®, Pomarsol Forte®, Dikotan ®M45, Dikotan ®M22 against Chickpea anthracnose disease caused by nine (9) isolates of Ascochyta rabiei was investigated in vitro conditions. In addition, the effects of fungicides on germination and disease emergence of naturally infected with A. rabiei chickpea seeds were investigated in climate room in vivo conditions. The fungal isolates YBUAr1, YBUAr2, YBUAr3, YBUAr8 and YBUAr9 were susceptible to fungicides; whereas, the isolates YBUAr4, YBUAr5, YBUAr6 and YBUAr7 were resistant to chemicals. Symptomatic seeds collected from infected plants (74%) had lower Ascochyta rabiei infection than asymptomatic seeds (11%). It was determined that 96% of asymptomatic seeds and 70% of symptomatic seeds germinated.

Anahtar Kelimeler

• Ascochyta rabiei
• Disease severity
• Resistance to fungicides
• Chickpea

Nohutlarda Ascochyta rabiei’nin Bazı Ticari Fungisitlere Dayanıklılık Durumunun Belirlenmesi

Öz

Nohut antraknoz hastalığına karşı yaygın kullanılan Nativo®, Bellis®, Altis® Premier, Thiovit Jet®, Pomarsol Forte®, Dikotan ®M45, Dikotan ®M22 adlı fungisitlerin in vitro koşullarda Ascochyta rabiei (Pass.) Labr. karşı direnç durumunun yanı sıra fungisitlerin A. rabiei ile doğal enfekteli nohut tohumlarının çimlenme ve hastalık çıkışları üzerine etkisi in vivo koşullarda araştırılmıştır. Fungisitlere karşı YBUAr1, YBUAr2, YBUAr3, YBUAr8 ve YBUAr9 izolatları hassas; YBUAr4, YBUAr5, YBUAr6 ve YBUAr7 izolatları direnç geliştirdiği saptanmıştır. Enfekteli bitkilerden toplanan simptomatik tohumların (%74), asimptomatik tohumlara (%11) göre daha düşük A. rabiei infeksiyonuna sahip olduğu ve asimptomatik tohumların %96’sının ve simptomatik tohumların %70’inin çimlendiği saptanmıştır.

Anahtar Kelimeler

• Ascochyta rabiei
• Fungisitlere dayanıklılık
• Nohut
• Disease severity
• Resistance to fungicides
• Chickpea

Kaynakça

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