HIPPEASTRUM DISEASE PROBLEMS
Red discoloration on amaryllis can be caused by any injury Leaf scorch causes bending of leaves and flower stalks at to the plant and does not always indicate a disease the point of infection. The first symptom is small, red, raised or lacerated ... [... more]
Michigan State University Extension |
CALADIUM DISEASE PROBLEMS
Tuber rot causes a slimy, soft, tuber decay. Destroy Root rot causes a dry chalky decay during the storage infected tubers. [... more]
Michigan State University Extension |
CONVALLARIA INSECT PROBLEMS
Lily-of-the-Valley weevil feeding causes notches on the leaves. Control measures are usually not needed. [... more]
Michigan State University Extension |
Lycoris squamigera--Magic Lily
Height: 24 in Spacing: 5 in Comments: Magic Lily (Vis. 3) needs a winter protective Propagation: The bulbs may be divided in August if needed. mulch or it may be grown as a pot plant. The bulb produces strap-like leaves (Vis. 2) which are gone by ... [... more]
Michigan State University Extension |
Tigridia pavonia--Tiger Flower
Height: 18 in Spacing: 6 in Flowers: Orange, purple, yellow (Vis. 1). Comments: Tiger Flower prefers a sunny site and fertile, The corms are dug in the fall when the foliage matures. Pack them in dry sand or peat. The leaves are removed ... [... more]
Michigan State University Extension |
CANNA DISEASE PROBLEMS
Bud rot causes numerous spots on unfolding leaves. The Canna mosaic virus causes leaves to have pale yellow The stems, sepals and petals have yellow bands. Destroy Aster yellows causes irregular, diffuse, dull yellowing of spots run together ... [... more]
Michigan State University Extension |
DAHLIA DISEASE PROBLEMS
Crown gall causes large abnormal growths at the base of Bacterial wilt causes stem drooping and wilting. Infected Bacteriosis causes browning and softening of the stem. The pith is moist and blackened with the rot extending Botrytis blight is ... [... more]
Michigan State University Extension |
DAHLIA INSECT PROBLEMS
Aphids suck plant juices and are controlled with dusts or European corn borer larvae feed on young leaves and Stalk borer also bores in the stems. Leafhoppers cause leaf discoloration along the leaf If not controlled, the plants are ... [... more]
Michigan State University Extension |
GLADIOLUS DISEASE PROBLEMS
Bacterial blight is serious in wet weather or on plants Scab causes pale yellow, water-soaked lesions on the Corm rot causes corky decay with sunken, reddish brown Hard rot is a storage problem. The corms are mummified. Brown to purplish brown ... [... more]
Michigan State University Extension |
GLADIOLUS INSECT PROBLEMS
Aphids can be controlled with various dusts or sprays. Thrips rasp the outer tissue layers of the leaves, flowers The tulip bulb aphid is common in sandy soil. Infested Shoots usually wither and die. Tarnished plant bug causes flower bud blast or ... [... more]
Michigan State University Extension |
ZANTEDESCHIA DISEASE PROBLEMS
Bacterial soft rot causes the stem to rot near the soil Crown rot is the soft decay of the lower half of the Several leaf spots cause spotting of the leaves. Root rot symptoms appear on the lower outer leaves Any flowers which open are likely to ... [... more]
Michigan State University Extension |
PAEONIA DISEASE PROBLEMS
Botrytis blight causes leafy shoots to wilt suddenly and Do not plant peonies in basins that collect water. Do not Downy mildew causes entire shoots to blacken and die. Cankers form on the stem causing them to fall over. The Leaf spots may be a ... [... more]
Michigan State University Extension |
