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Cydonia C 7-1 and Pyronia veitchii two complementary indicators


, : Cydonia C 7-1 and Pyronia veitchii two complementary indicators. Acta Horticulturae (44): 139-146

Cydonia C7-1 was sensitive to diseases belonging to the CLSV (apple chlorotic leaf spot)/pear ring mosaic group and to the rubbery wood (of apples and pears)/quince yellow blotch group. Pyronia veitchii was more sensitive than pears, Cydonia 7-1 or Spy 277 to the viruses of the apple vein yellows/Spy decline group.

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Related references

Desvignes J.C.; Savio A., 1975: Cydonia c 7 1 and pyronia veitchii 2 complementary indicators. Acta Horticulturae (Wageningen) 44: 139-143

Schimanski, Hh, 1980: Comparative studies on the reliability of the Spy 227 wood indicators and Pyronia veitchii (Trabut) Guill. in the detection of Spy decline virus of apples in the greenhouse. Archiv fur Phytopathologie und Pflanzenschutz6(3): 227-228

Guillaumin, A., 1945: Fruits of x Pyronia and of + Pyro-Cydonia. Artificial hybrids and graft hybrids between the pear and the quince are discussed. Their fruits are of no practical value.

Herissey, H.; Dillemann, G., 1951: Chemical research on the hybrid Pyronia veitchii A. Guillaumin; isolation of arbutoside. Annales Pharmaceutiques Francaises 9(3): 161-163

Siebert V.Z.; Engelbrecht D.J., 1981: Field and glasshouse evaluation of pyronia veitchii as an indicator of some apple latent viruses. In comparative graft-transmission tests on the detection of apple latent viruses only P. veitchii detected all isolates of apple chlorotic leaf spot virus. All isolates of apple stem grooving virus, as well as those isolates that cause Spy 227 epi...

Kunze, L., 1978: Stem grooves, an uncommon symptom on Pyronia veitchii, an indicator for virus diseases of pears. Of 10 pear trees indexed, 6 caused dents and grooves in the stem of the indicator. In the following year 4 of these 6 pear trees showed decline symptoms. A relationship between pear decline and stem grooves on P. veitchii is presumed.

Lansac, M.; Jarausch, W.; Dosba, F., 1995: Maintenance of two types of apple proliferation phytoplasmas in the micropropagated non-natural host Pyronia veitchii. Two genetically slightly different types of apple proliferation (AP) phytoplasmas were experimentally transmitted in vivo to P. veitchii, a woody indicator of fruit tree viruses and pear decline phytoplasmas. In vitro shoot cultures were obtained...

Kunze, L., 1986: Non-identity of the causal agent of stem grooves in Pyronia veitchii with apple and pear latent viruses and virus-like agents already described. Acta Horticulturae 193: 67-72

Schimanski, H.H., 1980: Comparative investigations on the reliability of the woody indicator Spy 227 and Pyronia veitchii (Trabut) Guill. when determining apple Spy decline virus in the glasshouse. In back-inoculation tests after heat treatment, P. veitchii reacted more reliably than Spy 227, and is therefore recommended for testing low virus concs. in trees or for weaker strs. of apple Spy [epinasty and] decline virus.

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