บทคัดย่องานวิจัย

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The response of mango stem end rot pathogens to heat.

Coates, L. M.; Cooke, A. W.; Dean, J. R.;

Acta Horticulturae Year: 1997 Issue: No. 455 Pages: 762-772 Ref: 17 ref.

1997

บทคัดย่อ

The response of mango stem end rot pathogens to heat.

In Australia, stem end rot of mangoes is caused by Dothiorella spp., Lasiodiplodia theobromae [Botryodiplodia theobromae], Phomopsis mangiferae and other fungi. D. dominicana is the major cause of mango stem end rot in Queensland. Previous studies have shown that in the cultivar Kensington Pride, stem end rot is less effectively controlled by heat treatments (hot water and vapour heat) than anthracnose (Colletotrichum gloeosporioides [Glomerella cingulata] and C. acutatum). The in vitro heat tolerance of selected isolates of D. dominicana, B. theobromae and Phomopsis sp. was investigated. Mycelial suspensions of each isolate were immersed in hot water (at temperatures ranging from 46-55 deg C for up to 60 minutes), rapidly cooled and then plated onto PDA. Isolates of D. dominicana were the most heat resistant of the 3 species, and Phomopsis sp. was the least heat resistant. In mango fruits of Kensington Pride inoculated with D. dominicana or B. theobromae, vapour heat treatment (fruit seed surfa

ce temperature of 46.5 deg for 10 minutes) was more effective for control of D. dominicana than for L. theobromae.