Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00000670
11/12/99
GLADIOLUS INSECT PROBLEMS
Aphids can be controlled with various dusts or sprays.
Thrips rasp the outer tissue layers of the leaves, flowers
and corms. The infested surfaces are glistening, whitish
gray. Young insects feed in the sheath. Infested flowers
are discolored and spotted. The leaves turn brown and dry
out.
The tulip bulb aphid is common in sandy soil. Infested
corms develop stunted and deformed plants if at all.
Shoots usually wither and die.
Tarnished plant bug causes flower bud blast or abnormal
development.
Wireworms bore holes in the neck or base of the leaves and
flower stalks. The shoots turn yellow and become deformed
and stunted.
Related information.
Pesticide Recommendations
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This file was generated from data base ZZ on 01/19/00.
Data base ZZ was last revised on 11/12/99.
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