Science Into Practice - The influence of storage on Bramley rotting

Many growers commonly lose 10 per cent or more of late stored Bramley apples, particularly through Nectria galligena, the fungus that causes apple canker in the orchard. The five per cent CO2, one per cent O2 storage regime improves control of bitter pit and superficial scald, but this has the adverse effect of promoting Nectria fruit rots.

With the loss of DPA, the use of storage protocols capable of controlling scald, such as SmartFreshTM and ethylene scrubbing, becomes even more vital. It is important to assess these technologies in terms of their effects on rot development.

In HDC project TF 191, the use of SmartFreshTM and ethylene scrubbing (Bi-On and catalytic scrubbers) have been assessed for their effect on quality and the development of fungal rots in controlled atmosphere-stored Bramley apples.

Ethylene scrubbing by catalytic methods and by Bi-On were found to be very effective in commercial stores, maintaining ethylene concentrations below 100ppb. In the first year of trials, there were no differences between storage protocols in incidence of natural rot in commercial stores, but the rate of rot development in Nectria-inoculated fruit was slightly reduced by ethylene scrubbing compared to SmartFreshTM.

This is not unexpected because ethylene is a signalling compound for the mobilisation of defence pathogens. In this case, ethylene action in the fruit is blocked by the use of SmartFreshTM but not by scrubbing.

Dates for your diary

8 February - Soft Fruit Panel Meeting, Norwich.

15 February - HDC/LGA Leek Agronomy Day, Southery, Norfolk.

Horticultural Development Company

For details on all HDC activity, visit www.hdc.org.uk.


Have you registered with us yet?

Register now to enjoy more articles and free email bulletins

Sign up now
Already registered?
Sign in

Before commenting please read our rules for commenting on articles.

If you see a comment you find offensive, you can flag it as inappropriate. In the top right-hand corner of an individual comment, you will see 'flag as inappropriate'. Clicking this prompts us to review the comment. For further information see our rules for commenting on articles.

comments powered by Disqus

Read These Next

Buoyant demand for UK apples but frost and labour remain concerns

Buoyant demand for UK apples but frost and labour remain concerns

As the British apple season begins, English Apples & Pears (EAP) is warning that growers will feel the effects of both a late frost in spring and also constrained labour supply.

Tomorrow's tractors

Tomorrow's tractors

These machines have advanced rapidly over recent years but what does the future hold? Sally Drury looks ahead.

Tractors for growers

Tractors for growers

The latest specialist tractors are providing wider choice for growers working in narrow rows, Sally Drury reports.


Follow us on:
  • Facebook
  • LinkedIn
  • Twitter
  • Google +
Horticulture Jobs
More Horticulture Jobs

Pest & Disease Tracker bulletin 

The latest pest and disease alerts, how to treat them, plus EAMU updates, sent direct to your inbox.

Sign up here

Professor Geoffrey Dixon

GreenGene International chair Geoff Dixon on the business of fresh produce production
 

Read Professor Geoffrey Dixon