LEAF AND POD SPOT OF COWPEA CAUSED BY TALAROMYCES TRACHYSPERMUS IN EL-MINYA GOVERNORATE OF EGYPT, AND PATHOGEN SURVIVAL ON CROP RESIDUES. | ||||
| Minia Journal of Agricultural Research and Development | ||||
| Volume 44, Issue 2, June 2024, Page 151-172 PDF (765.71 K) | ||||
| Document Type: Original Articles | ||||
| DOI: 10.21608/mjard.2024.346235 | ||||
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| Abstract | ||||
| Cowpea is subject to attacks by a wide range of plant pathogens including bacteria, fungi, viruses, and nematodes. In this study, a field survey conducted among cowpea growing regions of El-Minya governorate of Egypt including Minya, and Maghagha districts for leaf and pod spot disease. Our results revealed that the disease was present in all surveyed fields with the highest disease incidence and severity found in Minya District. The causal agent determined to be Talaromyces trachyspermus based on morphology of the fungal isolates, internal transcribed spacer sequence homology to a T. trachyspermus strain, as well as fulfillment of Koch’s postulates. Our study showed that detached pods of soybean, cowpea and plant foliage of thyme were the most susceptible to T. trachyspermus, presenting between 97.77 –77.78% DI% and 38.78- 61.66 DS%, whereas moderate infection was recorded on Chill pepper, Colored bell pepper, bean, faba been, Black seed, Green (sweet) pepper showed the lowest infection caused by this pathogen, while okra, sage and rosemary were the most resistant showed no infection. In addition, survival of T. trachyspermus was studied on non-buried and soil buried plant residues for 30 months. Data showed that colony forming units (CFUs) of the pathogen were recovered up to 30 months under both conditions, with a significant decrease in CFUs at each time point. However, the causal pathogen remained capable of producing diseases in cowpea plants. These results highlight the ability of this pathogen to survive on plant residues for long time with the capacity to infect plants. | ||||
| Keywords | ||||
| Cowpea; leaf and pod spots; Talaromyces trachyspermus; Plant residues | ||||
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