Rice Sheath Blight: A Comprehensive Review on the Disease and Recent Management Strategies
Rice Sheath Blight: A Comprehensive Review on the Disease and Recent Management Strategies
Aqleem Abbas1, Mustansar Mubeen2, Yasir Iftikhar2, Qaiser Shakeel3*, Hafiz M. Imran Arshad4, Maria del Carmen Zuñiga Romano5 and Sarfaraz Hussain6
ABSTRACT
Rice sheath blight (RSB) disease became one of the major threats to rice crops worldwide. The causal agent of RSB is the necrotrophic fungus Rhizoctonia solani. Finding appropriate management strategies to combat the disease to minimize rice yield losses and reduce global food security threats is challenging. However, scientists are still figuring out the best way to safeguard rice crops from RSB. Recently various pathogenesis-related (PR) viz. PR-3, PR-5, PR-9, PR-10, PR-12, and PR-13 and WRKY genes have been discovered in rice crops which are engaged in plant defensive responses and responsible for various biological processes, including growth, development, stress, embryogenesis, and resistance to RSB disease. Conventional fungicides are now being replaced with eco-friendly fungicides and biological agents, including mycoviruses that can effectively control RSB disease and minimize the hazardous effects of chemicals. Here, we summarize the disease cycle, symptoms, and effects of environmental variables on RSB disease development. Furthermore, recent advances in studies on the management of disease using cultural, chemical, and biological approaches including mycoviruses, transgenic approaches, gene loci/markers, gene silencing, and genome editing are also summarized. Finally, the expression of resistant-related genes in rice crops and biological agent mechanisms of action are discussed.
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