NDLI: Evaluation of the efficacy and economics of irrigation management, plant resistance and Brassica$_{spot}$™ models for management of white blister on Brassica crops

Content Provider	Springer Nature Link
Author	Minchinton, E. J. Auer, D. P. F. Thomson, F. M. Trapnell, L. N. Petkowski, J. E. Galea, V. Faggian, R. Kita, N. Murdoch, C. Kennedy, R.
Copyright Year	2012
Abstract	Options for the integrated management of white blister (caused by Albugo candida) of Brassica crops include the use of well timed overhead irrigation, resistant cultivars, programs of weekly fungicide sprays or strategic fungicide applications based on the disease risk prediction model, Brassica$_{spot}$™. Initial systematic surveys of radish producers near Melbourne, Victoria, indicated that crops irrigated overhead in the morning (0800–1200 h) had a lower incidence of white blister than those irrigated overhead in the evening (2000–2400 h). A field trial was conducted from July to November 2008 on a broccoli crop located west of Melbourne to determine the efficacy and economics of different practices used for white blister control, modifying irrigation timing, growing a resistant cultivar and timing spray applications based on Brassica$_{spot}$™. Growing the resistant cultivar, ‘Tyson’, instead of the susceptible cultivar, ‘Ironman’, reduced disease incidence on broccoli heads by 99 %. Overhead irrigation at 0400 h instead of 2000 h reduced disease incidence by 58 %. A weekly spray program or a spray regime based on either of two versions of the Brassica$_{spot}$™ model provided similar disease control and reduced disease incidence by 72 to 83 %. However, use of the Brassica$_{spot}$™ models greatly reduced the number of sprays required for control from 14 to one or two. An economic analysis showed that growing the more resistant cultivar increased farm profit per ha by 12 %, choosing morning irrigation by 3 % and using the disease risk predictive models compared with weekly sprays by 15 %. The disease risk predictive models were 4 % more profitable than the unsprayed control.
Starting Page	169
Ending Page	178
Page Count	10
File Format	PDF
ISSN	08153191
Journal	Australasian Plant Pathology
Volume Number	42
Issue Number	2
e-ISSN	14486032
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-12-07
Publisher Institution	Australasian Plant Pathology Society
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	White blister Brassica$_{spot}$™ Radish Broccoli Integrated disease management Plant Pathology Plant Sciences Agriculture Entomology Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science

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