Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00001478
11/12/99
TROPAEOLUM INSECT PROBLEMS
Aphids are the biggest problem on Nasturtiums. The
black bean aphid is the most serious pest but other aphids
also attack the plant. Severe infestations turn the
leaves pale yellowish-green and the plant begins to wilt.
Cabbage looper feeds on the leaves and may strip the
plant of foliage.
Thrips cause circular or irregular white spots, up to an
eighth inch in diameter, on the upper leaf surface.
Larger and more irregular spots are on the undersides of
the leaves. These will be marked by the dark, greenish
black excreta of the thrips.
Mites cause leaves to lose their green coloration. If the
infestation is heavy fine webbing may be seen.
Related information.
Pesticide Recommendations
Thrips
Aphids on Ornamentals
Spider Mites
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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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