New Zealand Journal of Crop and Horticultural Science abstracts

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Incidence and severity of the floral bud disorder "budjump",

on nashi (Pyrus serotina) grown in the Waikato region of New Zealand

D. J. KLINAC

B. GEDDES

The Horticulture and Food Research

Institute of New Zealand

Ruakura Research Centre

Private Bag 3123

Hamilton, New Zealand

Abstract  The incidence and severity of bud loss as a result of the floral bud disorders collectively called "budjump", were investigated from 1986 to 1991 throughout the Waikato region of New Zealand. Large variation was found in levels of bud loss from year to year. Most bud loss was found in the cultivar `Hosui', with high levels of bud loss significantly reducing fruit production in some years. In the cultivars `Kosui', `Shinsui', `Nijisseiki', and `Shinseiki' bud loss was much less severe. On `Hosui' most bud loss was found on young trees, and on young wood on older trees. Least bud loss was found at branch tips and on spur buds on older wood. High levels of bud loss were also associated with reduced flower numbers in remaining flower clusters. The type of rootstock and training system used had no effect on the incidence of budjump.

Keywords  nashi; Pyrus serotina; budjump; floral bud disorders; flowering; fruit production; Hosui

New Zealand Journal of Crop and Horticultural Science, 1995, Vol. 23: 185-190

0114-0671/95/2302--0185 $2.50/0 (c) The Royal Society of New Zealand 1995

PDF file of entire paper: medium quality (418K); (scanned from paper original: notes about this process)

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