American Iris Society Wiki (2024)

FAQs

What is sdb in irises? ›

Standard Dwarf Bearded (SDB)

These irises bloom after the MDB irises but before the Intermediate Bearded irises. They grow from 8" to 16" tall. These irises have a wide range of colors and patterns since they were derived from crosses of Tall Bearded irises (TB) and MDB irises and carry the colors and patterns of both.

'Why Be Normal' is a true flat iris, one having no standards and six falls with beards rather than one that merely has weak standards. Mid caramel falls have mid brown hafts and center stripes extending from mid mustard gold beards.

If you want more irises, leave the seed pods. You can cut them off after they dry and store them to plant next year. If you don't want more of the pod-generating iris, I would cut them off right after they bloom, that way the plant is not spending energy making the seeds.

The leaves become soft, and the rhizome root grows mushy. Iris root rot is a caused by Erwinia carotovora, a bacterial phytopathogen. It usually gets inside the rhizome through an opening created by some kind of injury.

The deeper set the rings are, the longer the stress has been affecting the body. Iron deficiency can lead to low energy, weakness, fatigue and anemia, which is the low production of healthy red blood cells. An iron deficiency shows up in the iris as a bright blue ring on the outside edge.

John Daugman [2] studied iris images from ophthalmologists spanning 25 years, and found no noticeable changes in iris patterns.

Pinguecula is a raised yellowish or white growth. It stays on the conjunctiva and doesn't overlap with the cornea. It usually doesn't cause symptoms or needs to be removed. Pterygium is a fleshy growth that has many blood vessels in it.

The American Iris Society suggests using a spoon to remove all infected tissue. Then, allow the rhizome to dry in the sun. Finally, use a chlorine based cleanser to powder the wound. Dousing in place with Dial antibacterial soap (with triclosan) can be substituted for the chlorine based cleanser.

Using natural enemies

Beneficial nematodes (roundworms) are a natural option to help control some borers. They are microscopic worms that look for and kill the caterpillars by introducing a bacteria.

If you decide to use an insecticide for control, select a product that contains azadirachtin, pyrethrins, permethrin, or spinosad. Insecticides must be applied before iris borer larvae tunnel deep into the plant.

What causes brushfield spots in the iris? ›

Brushfield spots are small, white or greyish/brown spots on the periphery of the iris in the human eye due to aggregation of connective tissue, a normal constituent of the iris stroma. The spots are named after the physician Thomas Brushfield, who first described them in his 1924 M.D. thesis.