Changed Disease aspect image to a PNG.
Changed Disease aspect image to a PNG.



Former-commit-id: 9559d89fc4937c796e3a13a527275c557e761f2d
julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine