01771nas a2200157 4500008004100000022001400041245012000055210006900175300001300244490000700257520116700264100001801431700001701449700001401466856013301480 1945 eng d a0031-949X00aRoot disease of Castanea species and some coniferous and broadleaf nursery stocks, caused by Phytophthora cinnamomi0 aRoot disease of Castanea species and some coniferous and broadle a162-180.0 v353 a

The fungus, Phytophthora cinnamomi Rands, is responsible for a destructive root rot of Chestnut and Chinkapin trees (Castanea spp.) in the United States. The author gives an outline of the work leading to the identification of the fungus, and reports on inoculation and field tests that have proved its pathogenicity on Chestnut and other hosts. The fungus causes a similar root disease in forest-tree nursery stock. Infection has been observed in the nursery on twenty broadleaf and coniferous species. Field and greenhouse inoculation tests have demonstrated the susceptibility to the disease of European Chestnut (Castanea sativa). The Asiatic species, C. crenata, C. mollissima, C. henryi, and C. seguinii, however, show a high degree of resistance. It seems probable that root rot of this type has been responsible for the recession of the American Chestnut in some areas of the United States. No satisfactory control measures have been evolved. Hybrid varieties resistant to both blight and root rot are being developed by crossing American Chestnut and Chinkapins with Asiatic species.

1 aCrandall, B S1 aGravatt, G F1 aRyan, M M uhttps://forestphytophthoras.org/references/root-disease-castanea-species-and-some-coniferous-and-broadleaf-nursery-stocks-caused01889nas a2200313 4500008004100000245010900041210006900150300001200219490000700231520093800238653002301176653002301199653001901222653001601241653002101257653002901278653002101307653001001328653001201338653002001350653001601370653002601386653003501412653001801447653002601465653001001491100001801501856005601519 1950 eng d00aThe distribution and significance of the chestnut root rot Phytophthoras, P. cinnamomi and P. cambivora.0 adistribution and significance of the chestnut root rot Phytophth a194–60 v343 a

A review of literature, with special reference to some recent publications in Spain and Portugal [cf. For. Abstr. 11 (Nos. 1468, 2268)]. The author concludes that Phytophthora cinnamomi plays a great part in disease of Chestnut in Spain, Portugal, France and Italy, and elsewhere in southern Europe, and is probably the major cause of death in the more southerly regions. P. cinnamomi has a considerable range of hosts. It has been found to attack Castanea sativa, Juglans regia, Pseudotsuga taxifolia, Quercus robur, Q. suber, Betula alba, Cedrus atlantica, Abies nordmanniana, A. alba, A. sibirica and Castanea crenata var. tamba. A close watch on Douglas Fir in the U.S.A. seems advisable in case a strain of the fungus should encounter and attack it. In contrast P. cambivora has only been found on Castanea sativa and C. crenata var. tamba.

10aAbies alba disease10aAbies nordmanniana10aAbies sibirica10aBetula alba10aCastanea crenata10aCastanea sativa diseases10aCedrus atlantica10adecay10aDisease10afungal diseases10aInk disease10aJuglans regia disease10aPseudotsuga laxifolia diseases10aQuercus robur10aQuercus suber disease10atrees1 aCrandall, B S uhttp://www.cabdirect.org/abstracts/19500602345.html