Description: Eggs overwinter in stems of iris and other
debris. After eggs hatch they must crawl to the base
of the iris to bore into stems. During this migration
they are susceptible to Grub-Away Nematodes. Infested
leaves are yellow from the tip back, have notches on
the edge; plants lose vigor; many fail to bloom.
Solution: Grub-Away Nematodes are the only
effective control; soak bottom portion of stem and soil.
Keep soil moist for first week.