Causal role of Xylella fastidiosa in oleander leaf scorch
Although PD is largely seen as a grape problem, the same strain of the bacteria that causes PD is also to blame for almond leaf scorch
and alfalfa dwarf.
The edges of the leaf scorch
and you get very rapid, elongated growth.
In the greenhouse, monogenic resistance to leaf scorch
was identified in `Ripley' (Stephens et al.
Unlike most other Persicarias it prefers to be in semi-shade to avoid leaf scorch
in hot sunshine.
It is of interest to note that among oleanders (Nerium oleander) the only varieties that have shown resistance to the oleander leaf scorch
disease are the semi-dwarf 'Petite Pink' and 'Petite Salmon' varieties.
But don't move them from somewhere very shaded into direct sunlight or they will suffer leaf scorch
Only when the new nomenclature is understood can a sensible choice be made, although as a general rule all do best in a sunny situation but not too hot, because some varieties suffer from leaf scorch
under such conditions.
he Glassy-winged Sharpshooter (GWSS) is a serious new pest in California because it can carry a bacterium which causes the grapevine-killing Pierce's Disease (PD) as well as almond leaf scorch
, alfalfa dwarf, oleander scorch, phony peach disease, plum leaf scale and citrus variegated chlorosis.
Using DNA markers, a gene cluster on molecular Linkage Group G conditioning resistance to SDS was dissected into resistance to root infection conditioned by Rfsl and resistance to leaf scorch
by Rft1 (Meksem et al.
In summer, overhead shadecloth prevents leaf scorch
, glare, and insect invasion.
Do not plant oleanders since they are susceptible to the deadly oleander leaf scorch