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Prolonged observations on spread and behaviour of proliferation disease in apple orchards


, : Prolonged observations on spread and behaviour of proliferation disease in apple orchards. Acta Horticulturae (44): 183-191

The disease spread naturally and the rate of spread was not affected by orchard situation, season, tree age, or rootstock.

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Related references

Schmid G., 1975: Prolonged observations on spread and behavior of proliferation disease in apple orchards. Acta Horticulturae (Wageningen) 44: 183-187

Marsh, R.W., 1952: Field observations on the spread of Armiliaria mellea in apple orchards and in a blackcurrant plantation. The part of this paper relating to the spread of armil-laria in apple orchards has also appeared in A.R. Long Ashton agric. hort. Res. Stat. for 1951 . Records of infection in a black currant field made from 1932 to 1941 suggest that the major fac...

Marsh, R.W., 1952: Field observations on the spread of Armillaria mellea in apple orchards and in a black currant plantation. Preliminary records of A. mellea infections in a black currant plantation from 1932 to 1941 suggested that spread was mainly by root contact. Recording of A. mellea infections was maintained from 1937 to 1951 in 2 Somerset (England) farm orchards...

Kaminska, M.; Zawadzka, B., 1973: Studies on apple proliferation disease in Poland III. Observations on the recovery of proliferation-affected apple trees. Fifteen-year-old Boiken, Jonathan, McIntosh and Belle de Boskoop trees were studied in 1969-70. They had shown up to 90% crop reduction in the previous 2 years, the peak of the disease symptoms having been reached in 1967. In 1968 the symptoms had...

Minucci, C.; Navone, P.; Boccardo, G., 1996: Presence of apple proliferation disease in orchards in Piedmont. Abnormal shoot proliferation on apple trees was observed in a small area near Turin, northwestern Italy, in 1995. The symptoms were similar to those of apple proliferation disease which is associated with phytoplasmas. PCR primed by universal olig...

Seidl, V.; Komarkova, V., 1974: Studies on natural spread of proliferation disease of apple. Experiments were conducted from 1962 to 1971 to clarify the ways in which apple proliferation disease spreads naturally. The disease was transmitted by root fusion, by implantation of Agrobacterium tumefaciens tumours and, in one case, by planting...

Krczal, G.B.iefernicht, K., 1992: Distribution of apple proliferation disease in orchards with integrated and conventional pesticide programs. Acta Horticulturae: 53-260

Trifonov, D., 1975: Apple witches' broom virus (proliferation) III. Experimental evidence for the spread of the disease in nature. In 1965, 1966 and 1968 2 trees of Golden Delicious, 1 of Starking Delicious and 1 of Red Delicious, tested for virus and mycoplasma diseases, were propagated. All were free from proliferation; Starking Delicious and Red Delicious were free from an...

Seemuller, E.; Dickler, E.; Berwarth, C.; Jelkmann, W., 2004: Occurrence of psyllids in apple orchards and transmission of apple proliferation by Cacopsylla picta (syn. C. costalis) in Germany. In southwestern Germany, Cacopsylla picta, C. melanoneura and C. mali were collected in each of four orchards that differed in the pest management regime. Psyllid numbers were low in a commercial orchard managed according to the guidelines of the...

Kaminska, M.; Zawadzka, B., 1973: Research into apple proliferation (witches' broom) in Poland. III. Observations on the disappearance of symptoms of apple proliferation. After the severe depression in yield which all four varieties suffered in the first year after infection, Jonathan recovered almost completely in the second year while Boiken and McIntosh took a year longer. Belle de Boskoop, though least affected...