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Oleander leaf scorch is a disease of landscape oleanders (Nerium oleander) caused by a X. fastidiosa strain that has become prevalent in California and Arizona, starting in the mid-1990s. This disease is transmitted by a type of leafhopper (insect) called the glassy-winged sharpshooter (Homalodisca coagulata).
A bacterial disease known as oleander leaf scorch (Xylella fastidiosa subspecies sandyi [31]) has become a serious threat to the shrub since it was first noticed in Palm Springs, California, in 1992. [32]
A plant that is not affected by any of the diseases caused by X. fastidiosa becomes a reservoir, holding the bacterium for other sharpshooters to pick up and carry to other plants. X. fastidiosa is linked to many plant diseases, including phoney peach disease in the southern United States, oleander leaf scorch and Pierce's disease in California ...
A microbial plant parasite, Xylella fastidiosa, is carried by this species, and is linked to many plant diseases, including phoney peach disease in the southern United States, oleander leaf scorch and Pierce's disease in California, and citrus X disease (citrus variegated chlorosis) in Brazil.
Nerium oleander: oleander Apocynaceae: All parts are toxic, the leaves and woody stems in particular. Contains nerioside, oleandroside, saponins and cardiac glycosides. Causes severe digestive upset, heart trouble and contact dermatitis. [citation needed] The smoke of burning oleander can cause reactions in the lungs, and can be fatal. Nicandra ...
Females may be wingless or winged , the production of the alate form occurs a higher rate in those regions where it is necessary for oleander aphid to migrate each year on to temporary hosts. [ 11 ] Oleander aphid has a wide range of hosts, but mainly feeds on plants in the dogbane family , including milkweeds , oleander and periwinkle . [ 9 ]
The larval stage of the polka-dot wasp moth, commonly called the oleander caterpillar, is widely known for its gluttonous appetite. The caterpillar feeds in almost any location (excepting California) where its food, the oleander plant, can be found. They are gregarious and can cause damage from minor to severe.
Cystotheca lanestris, the live oak witch's broom fungus, is a species of mildew that infects buds and induces stem galls called witch's brooms on oak trees in California, Arizona, and Mexico in North America. [2] [3] Witch's brooms are "abnormal clusters of shoots that are thickened, elongated, and highly branched."