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Lethal yellowing (LY) is a phytoplasma disease that attacks many species of palms, including some commercially important species, such as the coconut and date palm. In the Caribbean, it is spread by the planthopper Haplaxius crudus (former name Myndus crudus ) which is native to Florida, parts of the Caribbean, parts of Australia and Central ...
It is found everywhere bananas are grown in Africa, Asia, Central and South America. It attacks banana plants of all ages and spreads mainly through the soil. It causes wilting and yellowing of the leaves. [7] F. oxysporum f. sp. lycopersici causes vascular wilt in tomato. The disease starts out as yellowing and drooping on one side of the plant.
Citrus greening is distinguished by the common symptoms of yellowing of the veins and adjacent tissues (hence the "yellow dragon" name given by observing Chaozhou farmers as early as the 1870s [1]); followed by splotchy mottling of the entire leaf, premature defoliation, dieback of twigs, decay of feeder rootlets and lateral roots, and decline in vigor, ultimately followed by the death of the ...
Banana Xanthomonas Wilt (BXW), or banana bacterial wilt (BBW) or enset wilt is a bacterial disease caused by Xanthomonas vasicola pv. musacearum. [1] After being originally identified on a close relative of banana, Ensete ventricosum, in Ethiopia in the 1960s, [2] BXW emanated in Uganda in 2001 affecting all types of banana cultivars.
Papaya Lethal Yellowing Virus (PLYV) is an isometric viral plant pathogen, tentatively assigned to the genus Sobemovirus, [1] that causes lethal yellowing disease of the papaya plant. [ 2 ] The virus infects only Carica papaya , Jacaratia heterophylla , J. spinosa , Vasconcellea cauliflora , V. monoica and V. quercifolia , all from the papaya ...
The virus specifically targets carrots, parsnips, and cilantro but only effects carrot as this is the only host for the vector. This virus alone does not cause symptoms in carrots, but in connection with Carrot red leaf virus (CRLV) causes yellowing, reddening of leaves and yield loss.
In the early stages, MLND causes long yellow stripes on leaves. Unlike maize streak virus disease though, the streaks of MLND are wider. As the disease advances, the maize leaves become yellow and dry out from the outside edges towards the midrib. MLND can also cause dwarfing and premature aging of the plants.
The first instar larvae (crawlers) of Fiorinia theae are yellowish. The 2nd instar female is elongated with a dark brown scale cover, between 1.0 and 1.5 mm long. Immature males are smaller, less elongated and have a white scale cover.