VIRUS INDUCED CHANGES IN THE GROWTH OF POME FRUIT TREES

A.I. Campbell, T.R. Sparks
The effect of several virus and microplasma-like infections on the growth, cropping and general behaviour of healthy apple and pear cultivars on several rootstocks was examined in four experiments over a number of years.

Pome fruit cultivars and rootstocks differed greatly in their sensitivity to the viruses; pears were usually less tolerant to infection than apples and no virus spread occurred in any of the experiments.

Many characteristics of the trees were changed by the viruses; most were reduced in vigour and trees were less uniform. Some infections rendered the crop unsaleable or markedly reduced crop weight and fruit size. In a few cultivars some infections increased fruit colour and improved the crop to trunk girth ratio.

Campbell, A.I. and Sparks, T.R. (1977). VIRUS INDUCED CHANGES IN THE GROWTH OF POME FRUIT TREES. Acta Hortic. 75, 123-132
DOI: 10.17660/ActaHortic.1977.75.14
https://doi.org/10.17660/ActaHortic.1977.75.14

Acta Horticulturae