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.
Starting at around 18 months, toddlers begin to identify colors. Between 2 and 3 years, children begin to learn the names of the colors. Since children learn best through play, you can help your child learn colors with these fun games. 8 Ways to Teach Your Child Colors. Red Light, Green Light â When your child is first learning their colors, it's helpful to focus on just a couple of colors. The classic Red Light, Green Light game is a simple way to teach the colors red and green and also helps with listening skills.