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Alternaria brown spot Alternaria alternata: Alternaria leaf spot of rough lemon Alternaria citri: Alternaria stem-end rot Alternaria citri: Anthracnose = wither-tip Glomerella cingulata Colletotrichum gloeosporioides [anamorph] Areolate leaf spot Thanatephorus cucumeris = Pellicularia filamentosa Rhizoctonia solani [anamorph] Black mold rot
Dracaena aletriformis. Dracaena acaulis Baker; Dracaena acutissima Hua; Dracaena adamii Hepper; Dracaena aethiopica (Thunb.) Byng & Christenh. Dracaena afromontana Mildbr.; Dracaena ajgal (Benabid & Cuzin) Rivas Mart., Molero Mesa, Marfíl & G.Benítez
Dracaena (/ d r ə ˈ s iː n ə / [2]) is a genus of about 200 species of trees and succulent shrubs. [3] The formerly accepted genera Pleomele and Sansevieria are now included in Dracaena . In the APG IV classification system , it is placed in the family Asparagaceae , [ 4 ] subfamily Nolinoideae (formerly the family Ruscaceae).
Hard spots are the most common lesions. They are small, round, and sunken. The average diameter of hard spot lesions ranges from 3–10 mm (.12-.4 in). [13] [14] They have dark red to chocolate brown margins and often have pycnidia in the gray-colored centers. [15] A green halo may be present around the lesion. [16]
Citrus canker is a disease affecting Citrus species caused by the bacterium Xanthomonas (X.axonopodis; X. campestris).Infection causes lesions on the leaves, stems, and fruit of citrus trees, including lime, oranges, and grapefruit.
Dracaena fragrans (cornstalk dracaena), is a flowering plant species that is native plant throughout tropical Africa, from Sudan south to Mozambique, west to Côte d'Ivoire and southwest to Angola, growing in upland regions at 600–2,250 m (1,970–7,380 ft) altitude.
Dracaena ellenbeckiana was first described by Engl. in 1902. The species is a shrub or tree, growing 2-8 meters high, with erect stems that are often several from a common base, less often solitary, and little-branched. [5] The stems can be up to 8 cm (3.1 in) in diameter and are longitudinally fissured. [5]
Like the Rangpur lime and rough lemon, it is a hybrid of a mandarin orange (C. reticulata) and a citron (C. medica), with the citron being the pollen parent and the mandarin being the seed parent. The fruit is moderately large (around the size of an orange), seedy, round and slightly elongated, and yellow-orange in color.