A third variety with intermediate conidial lengths of 13.0-47.5 (28.9) µm occurring in Africa (predominantly Kenya) was named by Ivory (1967) as Dothistroma pini var. The long-spored variety linearis is reported to occur in western States of the USA and Canada whilst the short-spored variety pini is found in the central and eastern States of North America, and in England, New Zealand, Australia and Chile ( Ivory, 1967 Peterson and Graham, 1974 Edwards and Walker, 1978). linearis with conidial lengths of 23.0-42.0 (31.9) µm. pini with conidial lengths of 15.4-28.0 (mean 22.4) µm and Dothistroma pini var. Thyr and Shaw (1964) distinguished Dothistroma pini var. Three varieties of the conidial state are recognized on the basis of conidial length. However, the synonym Dothistroma pini is still in common use. Morelet (1968) considered these fungi to be identical and made a new combination Dothistroma septospora (Dorog.) Morelet, a nomenclature accepted by Sutton (1980). Hulbary (1941) named the fungus responsible for an outbreak of needle blight in Illinois, USA, as Dothistroma pini. pini was first described in Russia as Cytosporina septospora ( Doroguin, 1911). Moreover, since the asexual rather than the sexual spores are thought to be the primary source of inoculum, it is likely that the teleomorph is less invasive than the anamorph. The sexual form of the fungus, Mycosphaerella pini, does not have such a wide host range and is largely restricted to the Northern hemisphere. The pathogen has probably spread by a combination of factors: transport of infected planting material, and wind/cloud dissemination of spores between land masses ( Gibson, 1974). Plant disease reports from Europe also suggest an increase in the prevalence in that part of the world. At the same time the disease has increased in importance in the USA, where it has caused damage to shelterbelt, amenity and Christmas tree crops of P. The pathogen is particularly damaging where trees are planted out of their host range, most notably in the Southern hemisphere where large commercial monocultures of susceptible species such as Pinus radiata have been planted in New Zealand and Chile. The fungus is believed to be endemic to pines in Central America and Nepal ( Evans, 1984 Ivory, 1994), where it is a foliar pathogen.
Maladie des bandes rouges du pin strie rouge des aiguilles du pin taches circulaires du kakiĭothistroma-Nadelbraeune: Kiefer Nadelbraeune: Kieferĭothistroma septospora (the anamorphic form of the fungus) has spread rapidly around the world since its identification as a serious crop pathogen in Tanzania in 1957, and is now globally widespread. 1931 (anamorph)īlight: pine brown needle blight: pine circular: persimmon leaf spot Dothistroma needle blight needle blight: pine pine blight pine brown needle blight pine needle blight pine red band needle blight red band needle blight:pine red-band disease red-band fungus red-band needle blightĮstriado roio de las aciculas del pino manchas circulares del caqui manchas circulares del palosanto Dothistroma septosporum (Dorog.) Morelet 1968 (anamorph).Dothistroma pini Hulbary 1941 (anamorph).