Effect of virus infection on growth and cropping of greengage and Billington plum trees
In a trial with Greengage European plum (Prunus domestica L.) grown over a 20-year period, an analysis of the final 15 years showed that there was no significant difference in growth rate between trees infected with plum line pattern, apple chlorotic leaf spot, and "Prunus" necrotic ringspot viruses, and tress infected with "Prunus" necrotic ringspot virus alone. However, over 8 years of cropping, the overall loss of yield as a result of virus infection was 20 percent. In another trial with Billington Japanese plum (P. salicina Lindl.), trees free from virus infection were compared with trees infected with a single virus or with several viruses in combination. Over a 9-year period, the rate of growth was adversely affected only in trees infected with the line pattern strain of plum line pattern virus in combination with "Prunus" necrotic ringspot and apple chlorotic leaf spot viruses. Over a 5-year cropping period, either of 2 strains of plum line pattern virus combined with "Prunus" necrotic ringspot and apple chlorotic leaf spot viruses significantly reduced yield. When trees were infected singly with either "Prunus" necrotic ringspot or apple chlorotic leaf spot, or with a combination of "Prunus" necrotic ringspot and prune dwarf viruses, yields were not affected
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| Format: | biblioteca |
| Published: |
1984
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| Subjects: | FRUTALES, CIRUELA, PRUNUS DOMESTICA, PRUNUS SALICINA, MANZANA, CRECIMIENTO, CLOROSIS, NECROSIS, VIROSIS, PERDIDAS DE LA COSECHA, RENDIMIENTO, |
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