Malformation Disease in (Rosy Trumpet) Caused by in Mexico.

(rosy trumpet) is an economically important neotropical tree in Mexico that is highly valued for the quality of its wood, which is used for furniture, crafts, and packing, and for its use as an ornamental and shade tree in parks and gardens. During surveys conducted in the lower Balsas River Basin region in the states of Guerrero and Michoacán, symptoms of floral malformation were detected in trees. The main objectives of this study were to describe this new disease, to determine its causal agent, and to identify it using DNA sequence data. A second set of objectives was to analyze the phylogenetic relationship of the causal agent to spp. associated with trees with malformation surveyed in the same region and to compare mycotoxin production and the mating type idiomorphs of fusaria recovered from and . showed malformed inflorescences with multiple tightly curled shoots and shortened internodes. A total of 31 isolates recovered from symptomatic ( = 20) and ( = 11) trees were identified by molecular analysis as . Pathogenicity tests showed that isolates of recovered from induced malformation in inoculated seedlings. Eighteen isolates were tested for their ability to produce mycotoxins and other secondary metabolites. Moniliformin, fusaric acid, bikaverin, beauvericin, aurofusarin. and 8-O-methylbostrycoidin were produced by at least one strain of the 18 isolates tested. A multiplex PCR assay for mating type idiomorph revealed that 22 isolates were and that 9 were . Here, we report a new disease of in Mexico caused by .