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Flavescence dorée (from French "Flavescence" : yellowing and "dorée" : golden) is one of the most important and damaging phytoplasma diseases of the vine with the potential to threaten vineyards. [1] The bacterial agent has recently been named Candidatus Phytoplasma vitis, and its vector is the leafhopper, Scaphoideus titanus.
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 ...
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.
Grapevine yellows (GY) are diseases associated to phytoplasmas that occur in many grape growing areas worldwide and are of still increasing significance. The most important grapevine yellows is flavescence dorée.
Extensive infestations by the scale insect causes yellowing of the leaves, premature leaf drop and branch dieback, up to death of the host plant. [ 3 ] [ 2 ] However, there is a range of susceptibility among ornamental Camellia and Ilex species.
Lavandula angustifolia, formerly L. officinalis, is a flowering plant in the family Lamiaceae, native to the Mediterranean (Spain, France, Italy, Croatia etc.).Its common names include lavender, true lavender and English lavender [2] (though it is not native to England); also garden lavender, [3] common lavender and narrow-leaved lavender.
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Aster yellows, a yellowing disease that affects plants in the aster family; ... a plant virus that causes a yellowing disease in various species of beet and spinach;