Resistance of isolates from chickpeas ( L.) to fungicides.

Ascochyta blight is a disease that causes significant yield losses in chickpea crops in Turkey under favorable environmental conditions. The fungal pathogen is the causative agent of this disease. The antifungal activity of previous fungicides against was not effective due to the heterothallic nature of the fungus. The aim of this study was to determine the sensitivity of to fungicides (25.2 g kg- boscalid + 12.8 g kg- pyraclostrobin; 50 % tebuconazole + 25 % trifloxystrobin; 62.5 g L- propiconazole + 37.5 g L- azoxystrobin; 80 % thiram; 80 % kükürt (sulphur); 80 % mancozeb; 80 % maneb) under and field conditions. Pure cultures of were isolated from infected chickpea plants collected in Boğazlayan, Sarıkaya, Sorgun, Merkez and Yerköy. A total of 14 isolates and 4 references were evaluated. The field test was conducted at Yozgat Bozok University, Yerköy Agricultural Application and Research Center Station. The trials began on March 14, 2021. The experimental area was divided into plots and the susceptible chickpea variety Sarı98 was used for the study. Two artificial inoculations were carried out approximately on the 40th and 80th days after sowing. Twenty-four hours after inoculation, the chickpea plants were sprayed with the fungicides Nativo® WG 75, Bellis®, Dikotan® M45 and Thiovit Jet® using a handheld sprayer. testing revealed that was resistant to kükürt (sulphur), thiram, maneb, and mancozeb. A field study showed that the percentage of isolates treated with the mancozeb fungicide was between 14 and 21 % of the control. Therefore, effective disease management strategies should include not only the use of fungicides, but also alternative approaches such as the use of resistant varieties. Moreover, the study focused on phenotypic resistance and suggests that future research should investigate the genetic and molecular mechanisms underlying resistance to enable better resistance management.