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Links to online news on bananas

Genome sequencing of Mycosphaerella fungi

Monday, 22 August 2016

Two papers published in PLOS Genetics explore the genome of three fungi that attack the leaves of bananas ― including the causal agent of black leaf streak, better known as black Sigatoka. Understanding their evolution and how they interact with the banana plant could lead to the development  of tools to control these diseases.

Ecuador’s banana sector under climate change

Monday, 27 June 2016

The FAO published the results of an assessment of the impacts of climate change on the banana value chain in Ecuador. The biophysical analysis evaluated banana suitability under climate change scenarios; the impact of climate change on yields and disease incidence; and the carbon footprint and greenhouse gas emissions of banana production. The socio-economic analysis examined the national social policies to ensure a fairer distribution of returns to stakeholders across the banana value chain, especially with regard to smallholder farmers and banana plantation workers.

The potential of banana crop residues as a source of bioenergy

Wednesday, 25 May 2016

A report from the Polytechnic University of Madrid claims that using crop residues generated by banana production for bioenergy applications could cover 55% of the electricity demand in Ecuador's province of El Oro. The GIS study estimates that 190,102 tons of crop residues from a potentially exploitable area of 38,604 hectares would produce 19m liters of bioethanol.

Fairtrade certification in the banana hired labour sector

Monday, 23 May 2016

Scientists at the Wageningen University's LEI research institute recently published the results of a study on the impact of Fairtrade certification on the lives of plantation workers. One of the authors, Fedes van Rijn, told OneWorld Research that as far as wages are concerned, they did not find a difference between certified and non-certified plantations. But they did see differences in terms of in-kind benefits, such as access to housing and clean water. Workers at Fairtrade plantations were also better informed about their rights and generally more satisfied with their standard of living. The scientists also released a summary of the study and Fairtrade's response.

Q&A on the provitamin A-fortified GM banana

Tuesday, 05 April 2016

Grist's food writer Nathanael Johnson weighs in on the carotene-fortified GM banana scheduled to undergo a feeding trial at the Iowa State University in the US. The project is a collaboration between Australian and Ugandan scientists. Their aim is to introduce to Ugandan subsistence banana farmers a genetically modified cooking banana with higher levels of beta-carotene, a precursor of vitamin A, than the cultivars that are an important part of their diet. Johnson asked experts questions ranging from Aren’t there simpler ways to address vitamin A deficiency? to Why are Americans so interested?.

Malawi approves confined field trials of transgenic bananas

Friday, 11 March 2016

The Malawi National Biosafety Regulatory Committee recently approved confined field trials of transgenic bananas, according to Crop Biotech Update. The confined field trials will be conducted at the Bvumbwe Research Station of the Ministry of Agriculture and Food Security for three years, from 2016 to 2018. The transgenic banana planting materials will be introduced from Australia, and evaluated for resistance against the Banana bunchy top virus. Because of losses caused by bunchy top, Malawi has been importing bananas from Mozambique and Tanzania to meet the country's demand.

Australia's TR4 incursion one year on

Friday, 04 March 2016

One year on since the detection of TR4 in a Queensland farm, there is a sense of achievement that the disease has been contained to that one farm, but also high expectations that scientists will find a way forward to farming with TR4. ABC Rural discusses with nematologist Tony Pattison some of the projects scientists are working on.

The one-year anniversary comes on the heels of the fourth detection of TR4 on the 166-hectare Queensland farm, which remains under quarantine. The detection involved a single plant which has been destroyed and will be followed by the destruction of surrounding plants.

Climate smart coffee-banana intercropping

Monday, 04 January 2016

With average temperatures in Uganda expected to increase by 2 degrees Celsius in the coming decades, coffee, the country’s most important cash crop, is expected to suffer. According to a piece by IPS News Agency, areas below 1,300 meters will likely become unsuitable for Arabica coffee production, whereas those between 1,300-1,700 meters will be compromised for coffee unless production systems are adapted. Based on work done by the International Institute of Tropical Agriculture (IITA) and partner organizations, intercropping coffee with banana is one such alternative as shade from the taller banana plants can reduce temperatures for the coffee plants by 2 degrees Celsius or more. One of the disadvantages of coffee and banana intercropping is that it increases competition for water, nutrients and light, but these effects can be minimised by applying agronomic practices such as pruning and fertilization.

The human cost of cheap bananas

Monday, 16 November 2015

The Trade for Development Centre (a Belgian Development Agency programme) reports the main findings of an investigation into how banana value chains in Europe operate. Published by BASIC (the Bureau for Appraisal of Social Impacts for Citizen information)   “Banana value chains in Europe and the consequences of Unfair Trading Practices” estimates that the 25% decline in wholesale prices since 2001 has translated into a loss of revenue in the countries supplying the EU at a time when both production and living costs have been going up. Meanwhile, retailers increased their share of the banana value to around 40%.

The report is based on research commissioned by Banana Link and Fair Trade Advocacy Office as part of the Make Fruit Fair consortium.

Social and psychological impacts of the TR4 incursion in Queensland, Australia

Thursday, 05 November 2015

Even though tropical race 4 (TR4) has been detected in only one farm in Australia's north Queensland, it is also affecting the other banana growers. Besides changing the way they grow bananas, it has also had social and psychological impacts. Last August, ABC Rural talked to a Tully Valley farmer who explained how it had changed the way neighbours socialize with each other. More recently, CSIRO researcher Matt Curnock told ABC Rural that a survey of 600 banana farmers and other people affected by the situation revealed high levels of stress among a quarter of the respondents. The results of the survey, which also showed low levels of awareness in some parts of the community, will be used to write a public report on community well-being issues and plan future interventions.

Fatty acid dip extends banana's shelf life

Friday, 09 October 2015

Dipping bananas that are 75% green in a solution of lysophosphatidylethanolamine (LPE - a natural fatty acid) for 30 minutes increased the bananas' shelf life by 1 to 2 days, writes Science World Report. According to the press release, LPE improves the shelf life by maintaining membrane integrity, reducing respiration, and slowing the breakdown of starch and cell walls during the ripening and senescence of the fruit tissue. The study was published in HortScience.

Efforts to eradicate banana freckle from Australia continue

Friday, 25 September 2015

According to ABC Rural, Australia's Northern Territory Government hopes to have eradicated banana freckle by 2017. A controlled introduction of disease-free banana plants is planned for mid-2016.

The eradication plan was formarlized in 2014 when an Emergency Plant Pest Response Deed was activated. A deed is a legally binding agreement between various levels of government and the national plant industry body that covers the management and funding of responses to a plant pest incursion. As part of the deed arrangements, every commercial grower producing bananas across Australia's banana growing regions is now paying a compulsory production levy of $0.75 per kilogram of bananas marketed.

Climate change and the Cavendish banana

Monday, 29 June 2015
Source FAO
Source FAO

An increase in annual temperatures could make conditions more favourable for banana production in the subtropics and tropical highlands over the next 60 years, according to the authors of An assessment of global banana production and suitability under climate change scenarios, one of the chapters in the recently released FAO book on Climate Change and Food Systems. It could also lead to a loss in the current distribution of suitable areas (see map) where seasonal temperatures are expected to exceed 30 ºC. The models are based on Cavendish bananas, the type of banana that dominates the export trade.

Prior to its publication, the chapter had been shared with the International Business Times, which reported on how climate change is already affecting banana production in Central America.

TR4 quarantine lifted on second Queensland farm

Tuesday, 19 May 2015

Biosecurity Queensland has lifted the five-week quarantine on the Mareeba farm after it was shown that the initial positive result, based on a PCR test published in 2010, had proven to be a 'false positive'. The vegetative compatibility group (VCG) of the isolate turned out negative for tropical race 4 (TR4).

Banana growers were urged to remain vigilant. They were reminded that there is still one case of TR4 on a Tully Valley farm — BQ says that the 12 visual, molecular and biological diagnostic tests conducted on the Tully property have all been positive — and that they need to continue with their on-farm security measures. Harvesting under strict interim arrangements had resumed earlier on the Mareeba and Tully properties after the two plantation owners met an extensive list of conditions. According to the North Queensland Register, "the Queensland Government has made a commitment to reimburse the net revenue forgone for the period in which each of the quarantined properties was unable to trade”.

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TR4 detected at a second Queensland banana farm

Thursday, 09 April 2015

Biosecurity Queensland quarantined a second commercial banana farm after one of the plants tested positive for tropical race 4. Chief Biosecurity Officer Jim Thompson told Australia's ABC Rural that the entire farm will be surveyed and any infected plants will be destroyed. The farm is located near Mareeba,180 km from the first infected property in the Tully valley. BQ will investigate whether there are any links between the two affected properties.

On March 28, the 10 infected plants on the first property, plus another 200 surrounding plants, were destroyed. The plan is to destroy the entire infested area of 10 hectares.

TR4 confirmed in Pakistan and Lebanon

Friday, 03 April 2015

A team of scientists led by Wageningen University & Research Centre scientist Gert Kema confirmed the presence of tropical race 4 — the fungal strain that causes Fusarium wilt in Cavendish bananas — in Pakistan and Lebanon. In an interview to Fresh Fruit Portal, Kema said that the infested area is more than 100 hectares in Pakistan, compared to a few hectares in Lebanon. 

The first disease report is published in Plant Disease.

Global banana production under climate change scenarios

Friday, 27 March 2015

International Business Times reports on a chapter in a forthcoming FAO book that offers a comprehensive study on how rising temperatures, drought, declining rainfall and other effects could hurt some of the zones where bananas are grown. 

The authors looked at 24 banana-growing areas in Asia, Africa and Latin America. Some of their simulations bode well for bananas. For example, most regions are predicted to have highly favourable growing conditions in the second half of the century. In some places, warmer temperatures might make new areas suitable for growing bananas. 

Some tropical areas, however, are likely to see monthly rainfall decline by 2050. Moreover, if global warming surpasses 3 degrees Celsius, as it’s projected to do by 2100, more tropical areas may be lost for banana production due to excessively high temperatures.

International Business Times also reports on how climate change is already affecting banana production in Central America.

Philippino farmers export GCTCV-219 bananas to Japan

Friday, 13 March 2015

The Philippines' Department of Agriculture issued a press release on the export of GCTCV-219 bananas to Japan by farmers whose farm had been decimated by tropical race 4 (TR4), the fungal strain that causes Fusarium wilt in Cavendish bananas. The cultivar is a selection of GCTCV-119 which the Taiwan Banana Research Institute (TBRI) had shared with the Philippines in 2002. TBRI had developed GCTCV-119 by planting on a large scale tissue-culture plantlets of the local Giant Cavendish cultivar in TR4-infested fields and selecting the most promising surviving plants, hence the name GCTCV for Giant Cavendish tissue-culture variant. GCTCV-219 was similarly obtained through recurrent selection of GCTCV-119 plants in Davao's TR4-infested fields.

After field trials showed that only a small percentage of GCTCV-219 plants developed Fusarium wilt, the cultivar was introduced to 20 banana growers as part of a Bioversity International-led project supported by the Department of Agriculture's Bureau of Agricultural Research. The harvest and ripening protocols were also optimized to help the cultivar gain acceptance in the Japanese market.

The Department of Agriculture also announced that plantlets of GCTCV-219 have been multiplied by the Bureau of Plant Industry research centre in Davao and are ready for distribution to the region's smallholder farmers.

Banana plantation tested positive for TR4 in Queensland, Australia

Wednesday, 04 March 2015

ABC News Online announced that Biosecurity Queensland quarantined a plantation near Tully, south of Cairns, following an initial positive test result for tropical race 4 (TR4), the fungal strain that causes Fusarium wilt in Cavendish bananas. Further testing is being done at the farm to confirm the presence of the soil-borne fungus. Australian Banana Growers' Council chief executive Jim Pekin said strict quarantine regulations were in place to prevent the spread of this disease and protect the state's $600 million industry.

Transcriptome of banana fruit during ripening

Wednesday, 14 January 2015

Scientists from the National Botanical Research Institute in India sequenced the transcriptomes of unripe and ripe bananas. Many of the differentially regulated genes were found to be involved in cell wall degradation and synthesis of aromatic volatiles, while a large number might be novel genes. According to the authors, the datasets from this study may help develop strategies to manipulate banana fruit ripening and reduce post harvest losses.