Host Range Determination ofMyrothecium verrucariaIsolated from Leafy Spurge

Autor: Shaw-Ming Yang, S. C. Jong
Rok vydání: 1995
Předmět:
Zdroj: Plant Disease. 79:994
ISSN: 0191-2917
DOI: 10.1094/pd-79-0994
Popis: Yang, S.-M., and Jong, S. C. 1995. Host range determination of Myrothecium verrucaria isolated from leafy spurge. Plant Dis. 79:994-997. The host range of Myrothecium verrucaria (ATCC 90310) isolated from leafy spurge (Euphorbia esula) collected in China was determined to be 54 plant species in 42 genera and 11 families following artificial inoculation. The number of plant species infected was influenced by the dew temperature or invert emulsion (IE, water-in-oil) carrier for the inoculum. Of 46 plant species inoculated with an aqueous conidial suspension and incubated for 18 h in dew chambers at 15, 20, 25, and 30°C, 1, 6, 15, and 39 plant species, respectively, developed disease. Velvetleaf (Abutilon theophrasti) was killed by this pathogen only when the plants were inoculated with IE carrier plus conidia, but not when atomized with an aqueous conidial suspension and incubated in dew chambers at 30°C for 18 h. Disease severity on thistle (Carduus spp.) and starthistle (Centaurea sp.) was greatly affected by the use of the IE carrier; high inoculum levels of M. verrucaria were needed to kill older thistle plants. Myrothecium verrucaria has potential as a mycoherbicide against annual weeds.
Databáze: OpenAIRE