Alternaria gaisen
| Species: | Alternaria gaisen Nagano |
| Original References: | Nagano, K. 1920. Nashi no rin shibori yamai (Ringspot disease of pear). Nippon Engei Zasshi (Journal of the Japanese Horticultural Society) 32(3): 16-19. |
| Additional Reference: | Simmons, E. G. 1993. Alternaria themes and variations (63-72). Mycotaxon 48:98-101. |
| Conidia: | (on PCA) mature conidia typically 30-45(-55) x 13-15(-18) µm, beakless, short to long ovoid to ellipsoid, smooth to verruculose, yellowish brown, 5-8 transepta, 0-1(sometimes 2) longisepta, unbranched chains of 5-9. |
| Conidiophore: | (on PCA) 50-80-150 x 3-4.5 µm, arise directly from subsurface and surface hyphae, yellowish tan, unbranched. Secondary condiophore consist of one-celled apical elongations. |
| Disease: | Ringspot disease of Pear |
| Host: | Pyrus pyrifolia [Japanese Pear] |
| Alternaria species | Alternaria Online | Plant pathology | Agricultural and Life Sciences |