Login | Request Account (DAF staff only)

Aetiology, effect of chemicals, and influence of fruit exudates, insects and fruit maturity on the incidence of fruit speckle of banana

Share this record

Add to FacebookAdd to LinkedinAdd to XAdd to WechatAdd to Microsoft_teamsAdd to WhatsappAdd to Any

Export this record

View Altmetrics

Vawdrey, L. L., Langdon, P. and Westerhuis, D. (2010) Aetiology, effect of chemicals, and influence of fruit exudates, insects and fruit maturity on the incidence of fruit speckle of banana. Australasian Plant Pathology, 39 . pp. 524-529. ISSN 1448-6032

Full text not currently attached. Access may be available via the Publisher's website or OpenAccess link.

Article Link: https://doi.org/10.1071/AP09098

Abstract

The symptoms of fruit speckle of banana are minute reddish-brown to black spots (0.5–1 mm in diameter) often with an oil-soaked or water-soaked margin. Research was conducted into the aetiology, aspects of epidemiology and chemical control of fruit speckle. In a field planting of Lady-finger banana, bunches injected at bunch emergence with the fungicide azoxystrobin (0.15 g a.i./L) and sprayed fortnightly with azoxystrobin (0.25 g a.i./L) significantly reduced the number of speckle lesions/cm compared with bunches injected and sprayed fortnightly with insecticides indicating fruit speckle was caused by fungi. Of the 11 species of fungi recovered from speckle lesions, only Colletotrichum musae, Fusarium oxysporum and F. semitectum reproduced speckle-like symptoms on young fruit. Studies on fruit speckle epidemiology showed spraying young fruit with a 10% sap solution before inoculation with Fusarium spp. caused a 3-fold increase in the number of speckle lesions but had much less of an effect on the incidence of speckle following inoculation with C. musae. Fruit was also shown to be less susceptible to fruit speckle as it matured. The presence of flower thrips had little effect on the incidence of speckle on fruit inoculated with C. musae but caused a 10-fold increase in the incidence of speckle on fruit inoculated with Fusarium spp. In an in vitro experiment, the fungicides propineb, azoxystrobin, trifloxystrobin, copper oxide, mancozeb and chlorothalonil effectively reduced the disease compared with the inoculated control.

Item Type:Article
Subjects:Plant pests and diseases > Individual or types of plants or trees > Bananas
Plant pests and diseases > Plant pathology
Live Archive:03 Apr 2024 00:40
Last Modified:03 Apr 2024 00:40

Repository Staff Only: item control page