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We undertook an investigation to advance understanding of the host-range dynamics and biocontrol implications of  Cochliobolus lunatus  in the past decade. Potato ( Solanum tuberosum  L) farms were routinely surveyed for brown-to-black leaf spot disease caused by  C. lunatus . A biphasic gene data set was assembled and databases were mined for reported hosts of  C. lunatus  in the last decade. The placement of five virulent strains of  C. lunatus  causing foliar necrosis of potato was studied with microscopic and phylogenetic tools. Analysis of morphology showed intraspecific variations in stromatic tissues among the virulent strains causing foliar necrosis of potato. A maximum likelihood inference based on  GPDH  locus separated  C. lunatus  strains into subclusters and revealed the emergence of unclustered strains. The evolving nutritional requirement of  C. lunatus  in the last decade is exhibited by the invasion of vertebrates, invertebrates, dicots, and monocots. Our results contribute towards a better understanding of the host-range dynamics of  C. lunatus  and provide useful implications on the threat posed to the environment when  C. lunatus  is used as a mycoherbicide.

Host-Range Dynamics ofCochliobolus lunatus: From a Biocontrol Agent to a Severe Environmental Threat