11/19/2023 0 Comments Bacterial blight of gernaiumThis disease is prematurely a problem for zonal geraniums. Leaves eventually turn yellow, dry and drop prematurely. Pustules break open and release the rusty colored spores for which this disease gets its name. Corresponding yellow areas appear on the upper surface of the leaves. Symptoms: Characteristics symptoms develops on the under sides of the leaves in the form of reddish brown spores in the concentric rings. During periods of high moisture and relative humidity, senescing flowers are covered with a gray, fuzzy mass.Ĭausal organism: Puccinia pelargonii-zonalis The pathogen produces a brown decay on the cuttingsįLOWERS: The first evident symptoms usually premature fading and drying of flowers. Petals are discoloured and the flowers wilt and fall. Stubs on stock plants can develop brown lesions after cuttings are taken. Lesion usually occurs when spent flowers petals fall onto the leaves.ĬUTTINGS AND STEM: Symptoms appear at the base of cuttings as light to dark brown lesion which can result in complete basal rot. LEAVES: Symptoms vary from discrete spots or lesions to large, dead areas often with concentric rings. Symptoms: Fungus attacks leaves, stems and flowers under humid conditions and they rot in case of severe infection under favourable environmental conditions.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |