A new fungal disease of Acacia cyclops in Libya caused by Phyllosticta sp.

Abstract

Leaf and twig blight disease on Acacia cyclops A. Conn, caused by Phyllosticta spp. Pewrs. was found for the first time in Libya. The disease symptoms appear as light green necrotic spots of 1 - 3 mm in diameter which turned brown later and coalesced to form a blight of 6 - 9 mm in diameter. The fungus produced black pycnidia measuring about 0.178 x 0.152 mm in average. Pycnidia containing small, hyline, elliptical, one celled conidia exuded in orange coloured gelatinous matter. The conidia measuring about 12.38 x 5.0 n in average.