. Some diseases of Puerto Rican forage crops. Forage plants Diseases and pests Puerto Rico. FiGUEE 9.—^4, Leaf spot on Panicum maximum Var. Common Guinea (guinea grass) caused hy Phyllosticta patiici. X B, Cross section of pvcnidia of P. panici. X 352. C, Spores of P. panici. X 1000. ditions, production of forage by this gTass is very likely reduced markedly. The lesions (fig. 9, A) are narrow, elongate, and are on the upper side of the leaf. The disease is charac- terized by dark-browxi to black spherical pycnidia (fig. 9, B) th^t are often in clusters. They are 72-144^ in diameter. The
. Some diseases of Puerto Rican forage crops. Forage plants Diseases and pests Puerto Rico. FiGUEE 9.—^4, Leaf spot on Panicum maximum Var. Common Guinea (guinea grass) caused hy Phyllosticta patiici. X B, Cross section of pvcnidia of P. panici. X 352. C, Spores of P. panici. X 1000. ditions, production of forage by this gTass is very likely reduced markedly. The lesions (fig. 9, A) are narrow, elongate, and are on the upper side of the leaf. The disease is charac- terized by dark-browxi to black spherical pycnidia (fig. 9, B) th^t are often in clusters. They are 72-144^ in diameter. The conidia (fig. 9, C) are h3^aline, ovate, and X in size (U)- Cercospora leaf spot Cercospora leaf spot of Panicum maximum Jacq. Var. Common Guinea (guinea grass, yerba de Guinea) is caused by Cercospora jusimaculans Atk. This disease was observed on guinea grass only in 11. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Theis, Thomas. Federal Experiment Station of the United States Dept. of Agriculture
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