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Control of pudding spot in Crofton apple

Citation

Jones, KM and Bound, SA and Oakford, MJ and Koen, TB, Control of pudding spot in Crofton apple, Australian Journal of Experimental Agriculture, 32 pp. 503-6. ISSN 0816-1089 (1992) [Refereed Article]

DOI: doi:10.1071/EA9920503

Abstract

Regularly cropped Crofton apple trees in southern Tasmania were thinned using sprays of naphthalene acetic acid (NAA) at 10 mg/L or ethephon at 200 mg/L at balloon blossom (BB), full bloom (FB), 10 days after full bloom (DAFB) or 20 DAFB. These treatments were compared with hand thinning and an unthinned control. Ethephon had a uniformly mild thinning effect (about 30% compared to control), except at 10 DAFB, where no thinning occurred. NAA was inconsistent, thinning well at BB (50%), overthinning at both FB (85%) and 10 DAFB (88%), and underthinning at 20 DAFB (similar to the control). Ethephon applied at BB and FB increased both mean fruit weight (12 and 22%) and fruit size (28 and 79%), but later applications did not. NAA applications generally resulted in increased mean fruit weight and size, except for the 20 DAFB treatment, which was similar to the control. All ethephon treatments had a low incidence (<8%) of pudding spot similar to the controls and hand-thinned treatments. Most NAA treatments showed significantly higher levels of pudding spot than the other treatments. It is concluded that ethephon is a more predictable thinner for Crofton than NAA, and its use to control pudding spot is recommended. © 1992 CSIRO.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Horticultural Production
Research Field:Horticultural Crop Growth and Development
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural Crops
Objective Field:Pome Fruit, Pip Fruit
Author:Jones, KM (Mr Keith Jones)
Author:Bound, SA (Dr Sally Bound)
ID Code:26544
Year Published:1992
Web of Science® Times Cited:3
Deposited By:Agricultural Science
Deposited On:2003-08-01
Last Modified:2007-06-26
Downloads:0

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