Peach Rosette: the Morphology of an Associated Mycoplasmalike Organism and the Chemotherapy of the Disease

Molecular Characterization of Phytoplasmas Associated with Peach Diseases in Iran

“…ESFY phytoplasmas are members of the apple proliferation (16SrX) group and are distinct from X‐disease phytoplasmas (16SrIII group) that cause Western X and X‐diseases of peach, cherry and nectarine ( P. persica var. nectarina ) (Granett and Gilmer, 1971;Kirkpatrick et al, 1990; The IRPCM Phytoplasma/Spiroplasma Working Team‐Phytoplasma Taxonomy Group, 2004), peach rosette (Kirkpatrick et al., 1975), peach yellow leaf roll (Purcell et al, 1981), little peach and red suture (Scott and Zimmerman, 2001) diseases in North America and Europe. Other phytoplasmas infecting peach include peach yellows phytoplasma from North America and Asia (Jones et al., 1974) which belongs to elm yellows (16SrV) group and ‘ Candidatus ( Ca. )…”

The Short Life and Replant Problems of Deciduous Fruit Trees

“…Injections, but not foliar sprays, with several derivatives of tetracycline, under the bark or into the wood of peach trees infected with peach rosette, resulted in remission of rosette symptoms, and thus, confirmed the involvement of mycoplasma-like organism in peach rosette (Kirkpatrick et al 1975a). Israel et al (1973) reported that soil-applied potassium cyanide, mendelonitrile, benzaldehyde, peach root bark, and amygdalin reduced the total population of microorganisms, actinomycetes, Pythium, and pathogenic nematodes in an old peach soil.…”

“…These tests, involving 75 growers and about 2,000 diseased pear trees, showed that such treatment is feasible. This chemical also inhibited peach rosette symptoms four to five times more effectively than other compounds (Kirkpatrick et al 1975a). In this case, remission occurred when the chemicals were injected under the bark or into the wood, but not when sprayed on the foliage.…”

“…Ringspot viruses have been implicated as the causal factors of PSP (Smith and Stouffer 1975;Smith et al 1973), though Agrios (1971) suspected MLOs as the cause. MLOs also have been cited as being responsible for phony disease, Western X-and X-disease, and peach rosette, all of which, in one way or another, are involved in PTSL and related syndromes that cause heavy tree losses (Hutchins 1933;Jensen 1971;Kirkpatrick et al 1975a;Sands and Walton 1975;Savage and Cowart 1942a).…”

Characterization of Phytoplasmas Associated With Almond Diseases in Iran

“…The phytoplasmas associated with almond diseases in Iran also are distinct from phytoplasmas that infect almond in other areas including European stone fruit yellows, peach yellows and peach rosette phytoplasmas (Jones et al., 1974; Kirkpatrick et al., 1975; Lorenz et al., 1994; Marcone and Seemüller, 2001). These phytoplasmas cause limited damage in almond, whereas the lethal almond phytoplasma diseases seriously damage the development of almond in the central regions of Iran because of their ability to rapid spread by unknown insect vector(s) and presence of wide host ranges in other plants.…”