Are there any pictures of suspected citrus seedling blight? After the terminal buds or tender buds of seedlings are infected, dark green water stains appear, and then quickly expand into large round or irregular spots. If scalded by boiling water, the color gradually turns gray-green to dark brown. Pyraclostrobin thiophanate-methyl compound, dimethomorph propineb compound, epoxiconazole azoxystrobin compound.