Untersuchungen über die durch Phytophthora cactorum (Leb. u. Cohn) Schroet. hervorgerufene Kragenfäule des Apfels

Monitoring of Phytophthora species on fruit trees in Bulgaria

“…P. cactorum grows at pH 4 to 10, optimum 6-7. The results correspond to the data published by the authors mentioned below that Phytophthora species survive in different soils with pH varying from 3.5 to 8.5, and optimal pH values for most of them are about 6.5-7 (Braun and Kröber 1958;Jiang 1991;Jiang and Erwin 1993;Sneh et al 1981).…”

“…Literature reviews show that Phytophthora fungi are widely spread on fruit trees, citrus trees, forest trees, park trees and other species. Since 1980 they have affected the following fruit trees: apples, cherries, apricots, peaches and almonds (Braun and Kröber 1958;Jeffers and Aldwinckle 1987;Ellis 2008;Grove 1997;Teviotdale and Gubler 2009;Wilcox 1990Wilcox , 1998Kang et al 2008;Mbaga et al 2008;Brasier 2008). The following Phytophthora species have been reported on apples: P. cactorum, P. cambivora, P. cryptogea, P. drechsleri, P. megasperma, P. citricola, P. citrophthora; and on cherries: P. citrophthora, P. cactorum, P. cambivora, P. citricola (Erwin and Ribeiro 1996).…”

Isolation of Phytophthora cactorum from soil in orchards and strawberry fields and differences in pathogenicity to apple

“…The results of our trials indicate that hard pear fruits, such as unripe 'Conference' are more satisfactory for isolating this fungus. Braun and Kr6ber (1958) performed inoculation trials with a P. c a c t o r u m isolate from strawberry roots. With 'Golden Delicious' apples, P. c a c t o r u m could be isolated from the soil of only 1 of the 4 strawberry fields, in spite of wide-spread crown rot in the plants.…”

Recherches sur les interactions de Colletotrichum coccodes (Wallr.) Hughes et de ses hôtes principaux: Solanum tuberosum L. et Lycopersicum esculentum L.

“…d'apres BOONE et KEITT FORLOT (1956), potato carotte agar (P.C.A.) d'apres LANGERON (1952), Milieu de Richard-Lutzdie d'apres WAGNER (1961), Milieu au chloramphenicol, farine de pois diidie d'apres KEAY (1953), farine d'avoine, farine de haricot d'apres BRAUN (1958) II est remarquable que ces observations aient ete pratiquees dans deux champs ou la pomme de terre a ete cultivee pendant plusieurs annees consecutives et que ce type de fletrissement n'ait ete observe par les exploitants que dans des cas rares, au cours d'annees a ete exceptionellement sec et chaud. Ces constatations sont en accord avec celles de AMANN (1961).…”