Fusarium wilt (Fusarium oxysporum f. sp. callistephi): Stunted growth, yellowing or scorching of foliage, collapse. Vascular system discolored. Verticillium wilt: Same symptoms as Fusarium wilt. Disease not specific to China aster and may be severe in soil where other crops susceptible to Verticillium have been grown previously. Aster yellows: Caused by a phytoplasma (previously called a … Continue reading China Aster (Callistephus chinensis)