NDLI: Effects of multiple applications of chemical elicitors on Botrytis cinerea infecting Geraldton waxflower

Content Provider	Springer Nature Link
Author	Dinh, S. Q. Joyce, D. C. Irving, D. E. Wearing, A. H.
Copyright Year	2008
Abstract	Geraldton waxflower is susceptible to postharvest floral abscission caused by Botrytis cinerea infection. Pot- and field-grown waxflower cv. Mullering Brook plants and/or their harvested sprigs were spray treated with three known host plant defence elicitors, methyl jasmonate (MeJA), benzothiadiazole (BTH) or silicon (Si), and challenged with Botrytis cinerea after harvest. The efficacy of multiple MeJA, MeJA combined with BTH or Si and combined preand postharvest MeJA treatments in suppressing B. cinerea disease and floral abscission was assessed. Preharvest foliar applications of MeJA (1000 μM; two or four times), MeJA combined with BTH (150 mg/L) and MeJA combined with Si (1500 mg SiO$_{2}$/L) generally did not suppress B. cinerea development and floral abscission from harvested sprigs. MeJA plus Si applied to pot-grown plants slightly and significantly (P<0.05) increased disease incidence and severity and flower fall. However, application of a MeJA postharvest (1000 μM) spray or pre- (1000 μM) plus postharvest (500 μM) MeJA sprays, significantly (P<0.05) reduced B. cinerea incidence and severity on sprigs from field-grown plants. Overall, the preharvest plus postharvest 1000 μMMeJA spray treatment consistently and significantly (P<0.05) suppressed B. cinerea infection on flowers from both pot- and field-grown plants. However, there was little or no impact of these treatments on floral abscission. Thus, multiple applications of chemical elicitors do not show promise as an approach to controlling B. cinerea-induced postharvest floral abscission in Geraldton waxflower.
Starting Page	87
Ending Page	94
Page Count	8
File Format	PDF
ISSN	08153191
Journal	Australasian Plant Pathology
Volume Number	37
Issue Number	1
e-ISSN	14486032
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-01-01
Publisher Institution	Australasian Plant Pathology Society
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant Pathology Plant Sciences Agriculture Entomology Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science

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