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AUSTRALIAN MANGO RESEARCHERS : Resin canal causes still long way off

NT Country Hour By Lisa Herbert

Updated about 4 hours ago


Mango researchers are exploring two possible causes of resin canal discolouration (RCD), where black lines appear in mango flesh as the fruit ripens.

The disorder affects some Northern Territory and Queensland mangoes, with researchers acknowledging there is still a lot of work to do before they understand RCD.

00:00 AUDIO: Dr Andrew McNish from the Qld Department of Agriculture and Sydney based wholesaler, Carlo Ceravolo, discuss the possible causes of resin canal disorder (ABC Rural)

Sydney based wholesaler Carlo Ceravolo said resin canal was appearing on more fruit and consumers were shying away from the product.

"The last five years, I've seen it progressively getting worse, up until last year when I noticed a significant improvement in the outbreak of resin canal."

Mr Ceravolo said he believed the time of fruit picking was correlated to the occurrence of resin canal.

"It's only a personal theory of mine, but I think fruit maturity at time of harvesting plays a massive role,"
Mr Ceravolo said.

"I get to see a hell of a lot of different growers' fruit on the market.

"In many instances where there's a presence of resin canal, it is often in immature fruit."

But senior horticulturalist with the Queensland Department of Agriculture, Dr Andrew MacNish, said bacteria and fruit stress could be the causes.

"When we sample fruit progressively along the supply chain, we find the disorder is getting worse; there's more resin canal present and more severe resin canal,"
he said.

"This could be general stress that's causing this disorder to be expressed."

Researchers have also isolated a bacteria species from infected fruit.

"We've also found it in some of the dump water found in mango sheds and we've been able to induce symptoms of resin canal by inoculating fruit with the bacteria in more than 50 percent of cases,"
Dr MacNish said.

"We've also been able to reduce the level of resin canal in those inoculated fruit by treating the fruit with hot water, which is a common practice for managing pathogens in mango fruit at the shed.

"So this is providing some circumstantial evidence that bacteria may be involved, but we still need to do more work on this to be really sure that this is causing resin canal or at least contributing to it."

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While "Flavor" is very subjective, and each country that grows mangoes is very nationalistic, these are the mango varieties that are the most sought after around the world because of sweetnesss (Brix) and demand.

The Chaunsa has a Brix rating in the 22 degree level which is unheard of!
Carabao claims to be the sweetest mango in the world and was able to register this in the Guiness book of world records.
Perhaps it is time for a GLOBAL taste test ???

In alphabetical order by Country....



Alphonso (mango)
From Wikipedia, the free encyclopedia

Alphonso (हापुस Haapoos in Marathi, હાફુસ in Gujarati, ಆಪೂಸ್ Aapoos in Kannada) is a mango cultivar that is considered by many[who?] to be one of the best in terms of sweetness, richness and flavor. 

It has considerable shelf life of a week after it is ripe making it exportable. 

It is also one of the most expensive kinds of mango and is grown mainly in Kokan region of western India.

 It is in season April through May and the fruit wei…

INDIA 2016 : Mango production in state likely to take a hit this year

TNN | May 22, 2016, 12.32 PM IST

Mangaluru: Vagaries of nature is expected to take a toll on the production of King of Fruits - Mango - in Karnataka this year. A combination of failure of pre-monsoon showers at the flowering and growth stage and spike in temperature in mango growing belt of the state is expected to limit the total production of mango to an estimated 12 lakh tonnes in the current season as against 14 lakh tonnes in the last calendar year.

However, the good news for fruit lovers is that this could see price of mangoes across varieties decrease marginally by 2-3%. This is mainly on account of 'import' of the fruit from other mango-growing states in India, said M Kamalakshi Rajanna, chairperson, Karnataka State Mango Development and Marketing Corporation Ltd.

Karnataka is the third largest mango-growing state in India after Uttar Pradesh and Maharashtra.

Inaugurating a two-day Vasanthotsava organized by Shivarama Karantha Pilikula Nisargadhama and the Corporation at P…

Mangoes date back 65 million years according to research ...

Experts at the Birbal Sahni Institute of Palaeobotany (BSIP) here have traced the origin of mango to the hills of Meghalaya, India from a 65 million year-old fossil of a mango leaf. 

The earlier fossil records of mango (Mangifera indica) from the Northeast and elsewhere were 25 to 30 million years old. The 'carbonized leaf fossil' from Damalgiri area of Meghalaya hills, believed to be a mango tree from the peninsular India, was found by Dr R. C. Mehrotra, senior scientist, BSIP and his colleagues. 

After careful analysis of the fossil of the mango leaf and leaves of modern plants, the BISP scientist found many of the fossil leaf characters to be similar to mangifera.

An extensive study of the anatomy and morphology of several modern-day species of the genus mangifera with the fossil samples had reinforced the concept that its centre of origin is Northeast India, from where it spread into neighbouring areas, says Dr. Mehrotra. 

The genus is believed to have disseminated into neighb…