Cercospora. Cercospora is the most common of the many diseases of a sweet gum tree, according to the Florida Department of Agriculture and Consumer Services. Cercospora is a fungal spot disease that produces dark brown, bordered, angular to circular spots 2 to 10 mm in diameter on both sides of leaves.rtist's Conk. Artist's conk (Ganoderma applanatum) is a fungal disease of a sweet gum tree that causes wood rot, according to the University of California IPM Online. Artist's conk infects trees by entering through wounds. White rot occurs in roots and trunks.
Vision and Age Infant Eyes Eye Development. Even in the womb babies can tell the difference between light and dark. And at birth, they see shapes by following the lines where light and dark meet. Yet, they are several weeks old before they can see their first primary color â red.
One of the many joys of a newborn baby is witnessing the development of the senses. A baby is born with the eye structures needed for vision, but must learn how to use them together to actually be able to see.. Although newborns can't see very well, they can see quite a bit. Seeing Colors Young babies can make out objects with high contrast, such as black-and-white patterns, checkerboards, and other contrasting color pairs.