Temporal and Spatial Development of Sorghum Anthracnose in Arkansas.

Development of sorghum anthracnose in time and space on susceptible ('BTx623' and 'Pioneer 8313') and resistant ('Cargill 888Y') sorghum (Sorghum bicolor) cultivars was investigated in field plots inoculated with a mixture of three strains (T430-SW, Ar54-SW, and ArSS-1SW) of Colletotrichum sublineolum in 2001 and 2002. After slow development during early growth stages, sorghum anthracnose developed rapidly after flowering. The logistic model provided a good statistical fit for disease progress curves for sorghum anthracnose in Arkansas.

Colletotrichum acutatum var. fioriniae (teleomorph: Glomerella acutata var. fioriniae var. nov.) infection of a scale insect.

An epizootic has been reported in Fiorinia externa populations in New York, Connecticut, Pennsylvania and NewJersey. Infected insects have profuse sclerotial masses enclosing their bodies. The most commonly isolated microorganism from infected F.