Diseases Of Gladiolus
Gladiolus, or ‘glads’ as they are commonly called, are often seen in home gardens and in fields of cut flowers. |
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Gladiolus plants and corms are prone to diseases caused by viruses, fungi and bacteria and viruses.
Some diseases that usually affect gladiolus plants and corms are as follows:
Scab: this infection appears on corm husks as elongated lesions with black margins. They begin as pale yellow, water-soaked spots, and then the lesions start turning brown. Scab infection can be controlled by removing the infected corms or plants.
Fusarium Rot and Yellows: Corms infected with this fungus have show premature yellowing of leaves, with stunted growth and eventually failure to bloom. The corm rot is mainly restricted to the base area. Removing the infected plants and corms, good storage procedures and dusting the corms with fungicides planting are remedial procedures.
Penicillium Storage Rot: Bruised corms in storage are often infected by this blue mold fungus, which results in a green-blue growth over the lesions. Harvesting in wet weather or improper curing of the corms lead to this condition, and this can be controlled by the use of fungicides.
Botrytis leaf spot: This leads to leaf, flower, stem and corm rot. Application of protective fungicides and removing affected plants are necessary to control this infection.
Stromatinia Corm Dry Rot: Leaves from infected corms turn yellow and die prematurely, while red-brown lesions show on the corms. Good harvesting, treating the soil with a good fungicide and discarding infected corms are ways to control this disease.
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