Resistance to Septoria Leaf Spot in Eastern Cottonwood

Abstract

Septoria leaf spot, which is caused by Septoria musiva Peck, is a potentially serious dis ease of eastern cottonwood (Populus deltoides) in nuseries and plantations in the lower Miss issippi Valley. Lesions reduce photosynthetic area of leaves and cause premature leaf fall; the fungus also causes cankers on the stem (l). During late summer 1975. incidence of Septoria leaf spot was high in a cottonwood clonal nursery at Huntington Point. near Greenville, Mississippi. Absence of leaf damage from Melampsora rust and in sects made this an exce llent opportunity to screen for clonal differences in restisiance to Septoria leaf spot.

Citation

Cooper, D. T.; Filer, T. H. 1976. Resistance to Septoria Leaf Spot in Eastern Cottonwood. Plant Disease Reporter 60(10):812-815.