TODAY -

Black tip (Koeli) of mango and its management

RC Shakywar, KS Tomar, M Pathak *



Black tip

Black tip or taper tip or girdle or tip rot or mango necrosis, locally known as koeli or koel padda or chimney disease of mango (Mangifera indica L.) is peculiar to India and does not occur in any other country. Woodhouse (1909) first reported it from Bihar in the year 1908.

It is the most common disease of mango fruits in Bihar, Uttar Pradesh and also occurs in Haryana, Madhya Pradesh, Punjab and West Bengal in orchards situated near to brick kilns and may bear the necrotic lesions and become useless for sale and consumption. Losses due to this disease are about 25%. In some trees there are almost 100% losses due to this disease. South India appears to be free from this disease of mango.

Some of the best mango varieties are highly susceptible i.e. Dasheri. India ranks first among world’s mango producing countries accounting for about 50% of the world’s mango production. Other major mango producing countries include China, Thailand, Mexico, Pakistan, Philippines, Indonesia, Brazil, Nigeria and Egypt.

India’s share is around 52% of world production i.e, 12 million tons as against world’s production of 23 million tons (2002-03). An increasing trend has been observed in world mango production averaging 22 million metric tons per year. World wide production is mostly concentrated in Asia, accounting for 75% followed by South and Northern America with about 10% share.

Economic Importance of Mango

The fruit is very popular with the masses due to its wide range of adaptability, high nutritive value, richness in variety, delicious taste and excellent flavor. It is a rich source of vitamin A and C. The fruit is consumed raw or ripe. Good mango varieties contain 20% of total soluble sugars. The acid content of ripe desert fruit varies from 0.2 to 0.5% and protein content is about 1%.

Raw fruits of local varieties of mango trees are used for preparing various traditional products like raw slices in amchur, brine, chutney, murabba, panhe (Sharabat) and pickle etc. Presently, the raw fruit of local varieties of mango are used for preparing pickle and raw slices in brine on commercial scale while fruits of Alphonso variety are used for squash in coastal western zone.

The wood is used as timber and dried twigs are used for religious purposes (Havan). The mango kernel also contains about 8-10% good quality fat which can be used for saponification. Its starch is used in confectionery industry like soap.

Symptoms

The disease is characterized by necrosis of tissues at the distal end of the fruit. The first symptoms is developed of a small etiolated area at the distal end which gradually spreads, turns nearly black and covers the tip completely. The tip is flattened with the outer skin turning hard and sunken. The inner portion of fruits is soft and yields a dark brown liquid due to rotting induced by saprophytic bacteria.

The disease commonly occurs when the fruits are about 6-10 weeks old or when they are reaching ripening stage. Apart from these factors, irrigation, condition of the tree and management practices also play important role in deciding the severity of the disorder.

Physiological factor

Gases like carbon monoxide, sulphur dioxide and ethylene constituting the fumes from brick kiln are known to damage growing tip of fruits and give rise to the symptoms of black tip.

Etiology

It has been confirmed by the majority of workers that bricks kilns fumes emitted from the burning of coal are harmful to the mango fruit and are solely responsible for causing black tip of mango.

The gases in coal fumes, sulphur dioxide, ethylene and carbon monoxide are especially toxic to the plants and of these sulphur dioxide causes the maximum damage. Wind direction and velocity play important role in increasing incidence of this disease.

Management

o The incidence of black tip can be minimized by the spray of borax (1 per cent) or other alkaline solutions like caustic (0.8 per cent) or washing (0.5 per cent) soda.
o The first spray of borax should be done positively at pea stage followed by two more sprays at 15 days interval.
o Trees sprayed three times with a solution of borax 0.6 per cent (600g of borax mixed in 100 litres of water) plus a sticker @ 10 litres per tree was almost free from black tip.
o Orchards should be at least at a distance of 1.6 kms in the east and west and 0.8 kms in the north and south from brick kiln.
o The chimney height of the kiln should be at least 15-18 meters.
o Although black tip of mango can be prevented by applying borax, the disease is not caused by the fruit surface that prevents direct entry of poisonous fumes or changed into a form which is less toxic.
o Restriction of new kiln sites to a safe distance stopping the working of kilns before the time of fruit-set and use of telescopic chimneys (12-15 m high).
o Mango decline is becoming a serious problem in many parts of northern India.
o On the old leaves, leaf tissues collapse in clearly defined marginal areas of brick red color towards the tip.
o Younger leaves generally do not show symptoms up to two months of their emergence.


For further details contact:-
Public Relations & Media Management Cell,
CAU, Imphal.
Email: [email protected]


* RC Shakywar, KS Tomar, M Pathak wrote this article for The Sangai Express
The writers are from College of Horticulture & Forestry, CAU, Pasighat, Arunachal Pradesh
This article was webcasted on February 22 2022.



* Comments posted by users in this discussion thread and other parts of this site are opinions of the individuals posting them (whose user ID is displayed alongside) and not the views of e-pao.net. We strongly recommend that users exercise responsibility, sensitivity and caution over language while writing your opinions which will be seen and read by other users. Please read a complete Guideline on using comments on this website.




LATEST IN E-PAO.NET
  • 76th Republic Day @ Kangla #3 : Gallery
  • Violence in Manipur 2023-2025 : Timeline
  • Epom Amadei Ithak - A theatrical revisit
  • Economy of the dynamic global landscape
  • Is the Bhagavad Gita relevant today ?
  • Healthy hair in Winter
  • Guwahati Asian Film Festival (GAFF) 2025
  • From the battlefields to Delhi
  • Speculations on replacement of Chief Minister
  • 12th Legislative Assembly #2 : Gallery
  • Education & its disjuncture in Manipur
  • HUN-Thadou Cultural Fest 2025 : Theme
  • Coo :: Poem
  • Agartala Coach : India U-19 Women Cricket
  • The story of the village of hope
  • Career choice in wetlands
  • CM in Delhi to meet Shah
  • After failed plastic ban bid, on brickfields
  • New catfish species discovered in Chakpi
  • Love, Unsure :: Poem
  • Manipur's border battles: Deeper conflict
  • A world without leprosy
  • Origin of corruption & possible remedies
  • The question of life
  • 'Sereki' unveils Majuli-themed campaign
  • Posers over summons to Delhi
  • Addiction-free campaign
  • Mera Chaorel Houba @Kangla #5 : Gallery
  • Lamtanganba, Adum , Mahaiso : eMing
  • Manipur : Champions Jr Natl Sepaktakraw
  • Effective Unified Command approach
  • Saurashtrian Tamils
  • Accepting the change :: Poem
  • From Kumbh to heaven direct
  • Edge of the seat suspense
  • Wetlands revival efforts reaping fruit
  • Natambakta : Play by JNMDA #4 : Gallery
  • EIIFF 2025 unveils Festival Memento
  • Climate change & plant diseases
  • Shija Hospital- AHPI Healthcare Award
  • Budget 2025: A big gift for middle-class
  • The Science of Success : Attitude #2
  • Cakeology 2025: India's largest cake expo
  • Need to stick to a consistent narrative
  • Leniency on tobacco ban aiding demographic
  • 76th Republic Day @ Kangla #2 : Gallery
  • Pheiroijam Christina - 21st Miss North East
  • Manipur: Gold at 28th Jr National Sepaktakraw
  • Clarion call for redeeming our rightful future
  • The Power of Poppy - 67 :: Poem
  • Clean energy for sustainability
  • Union Budget: Industrialists from NE speaks
  • Balaram Sougaijamba: General of Manipur
  • Nikhil Okram crowned 14th Mister North East
  • Chadong village: Rising from waters with hope
  • Financial literacy for common man
  • Obituary: (L) Pu Thangkholen Sitlhou
  • Nail care in Winters
  • State of war since 2023: No winner, only losers
  • Talks on new district row
  • Radio E-pao: 1000+ songs from Manipur
  • Maibi Jagoi @ Kwak Tanba : Gallery
  • February Calendar for Year 2025 : Tools
  • Ballad of Letting Go :: Poem
  • 2nd Eikhoigi Imphal International Film Fest
  • Deeper exploration of term 'Hill-Valley Divide'
  • Children's Book to adopt 'Look East Policy'
  • Pony registration & conservation
  • Endless suffering of internally displaced child
  • 21st Ningtham Kumhei Fest #2 : Gallery
  • Thiyam Suryamukhi conferred Padma Shri
  • Isolate Kuki Militants by facilitating safe return
  • Sports Meet held at Rongdai Village
  • Eco-Apocalypse: Prevent collapse with Green
  • Grand Finale : 21st Mega Miss North East
  • Time to give more teeth to ST demand
  • 5 years of ILP; what about NRC demand ?
  • Remembering Md Ladu, celebrated polo player
  • The Lament of Love's Deceit :: Poem
  • Need for inculcating value based education
  • Royte - Times Young Entrepreneur Award
  • Glass Child Syndrome ! 'Sibling rivalry'
  • 6 Films for NE Section at GAFF 2025
  • Pony registration & conservation
  • Impartial anti-extortion cell need of the hour
  • 76th Republic Day @ Kangla #1 : Gallery
  • Conservation Strategies of Pethia manipurensis
  • Remembers 13 Brave Indian Soldiers
  • Workshop: Intl Year of Quantum Science
  • Governor's role and discretionary powers
  • Physics workshop for educators at Agartala
  • Who wins Delhi - Daru or Dharma
  • War on Drugs: A war Manipur cannot loses
  • NE turning into transnational drug hub
  • Essence of Gaan-Ngai #2
  • Manipur's dystopian reality
  • The day Light reached the hills
  • 2nd Eikhoigi Imphal Intl Film Fest 2025
  • Why is depreciation of rupee not stopping ?
  • An introduction to Rabies (Hydrophobia) #5
  • Thoithoiba Yelhou Yangkok Artist #2 : Gallery
  • Republic Day Titbits
  • NIT Manipur: Best Design Award @VLSI Design
  • The Power of Poppy - 66 :: Poem
  • Grand Finale: 14th Mega Mister North East
  • Application : FILMART, Hong Kong
  • The Science of Success : Attitude #1
  • 21st Ningtham Kumhei Fest #1 : Gallery
  • Demographic for balkanisation of Manipur
  • Training on Mushroom Cultivation at Nambol
  • Jugeshwor Kshetrimayum receives GELA 2025
  • Construction Committee of Meetei Yumpham
  • Call against misuse of social media
  • Positive & negative aspects of social media
  • In Search of Peace in Manipur
  • Embracing the Shadows :: Poem
  • Dr Manmohan Singh will live on
  • Rise in the price of medicines
  • Respecting the dead- Denying is a disgrace
  • Winter skin care tips for oily skin
  • Illegal immigrants :: Of FMR & border fencing
  • JD-U row exposes national parties' apathy
  • State Gaan-Ngai @Sagolband #2 : Gallery
  • On 'Only BJP can save Manipur'
  • Frontline health workers dispelling darkness
  • 14th East Himalayan Trade Fair
  • Life is plastic
  • Killers on the road : 834 lives lost
  • Call to action to save State's wetlands
  • Essence of Gaan-Ngai #1
  • The Taste of Dreams wins @Red Intl Film Fest
  • Science: 3rd eye for Meitei-Kuki reconciliation
  • Northeast flies high in direct selling
  • Mastering focus amidst distractions
  • An introduction to Rabies (Hydrophobia) #4
  • Indo-Naga Talks (From 2012) :: Timeline
  • BJP : Tepid response from the hills
  • BABINA Hospital sets example in healthcare
  • Nitya Ras @Nongmeibung #1 : Gallery
  • Agonizing reality of our country's veteran elites
  • Historicising the colonial narratives
  • NSS Team Departs for National Integration
  • HUN-Thadou Cultural Festival 2025
  • Time to recreate Naga Peoples Convention 2.0
  • Career in nutrition
  • Need to give more meaning to War on Drugs
  • Time for real action not empty rhetoric
  • Foundation: Manipur Press Club #2 : Gallery
  • "Aronba Wari" :: Shumang Leela Synopsis
  • Tripura's livelihoods challenges
  • Archaeological Exhibition @ Kangla : Gallery
  • Gaan-Ngai @Chaopok village #1 : Gallery
  • Manipur needs to affirm her tribal roots
  • Madras/Chennai- 1989 till 2024 : Gallery
  • Investigate "arms recoveries" in Mizoram
  • Training on Mushroom Cultivation
  • NE Direct Selling Conference & Expo
  • Response of Delhi in last 20 months
  • Regulated entry after FMR scrap, border
  • Mutua Bahadur : Preserving Manipuri culture
  • Competitive Altruism: Resolving ethnic conflict
  • Pithe Puli Utsav at Agartala
  • Building the best version of yourself
  • Guwahati Asian Film Festival 2025
  • Tips to keep your lips soft & smooth in winter
  • Subsidised flight tickets for all
  • MCPCR alert on child trafficking fear
  • Imoinu Erat Thouni @ Wangkhei : Gallery
  • Gaan-Ngai celebrating Culture in Delhi NCR
  • The Weeping Gods of Manipur :: Poem
  • Disarming Kuki-Zo armed groups under SoO
  • Why nurses deserve more recognition, pay
  • The hidden truths of our social media lives
  • MMTU stand bang on target: Recapping May 3
  • Enhancing aerial options to ease travel woes
  • 2nd Emoinu Fish Festival #1 : Gallery
  • Sustainable development - climate action #1
  • RIST Talk- 62 : Artificial Intelligence (AI)
  • "Technically a BJP MLA will rule Nagaland"
  • Makar Sankranti : vibrant customs & traditions
  • Why gold is a strong hedge but ...
  • Delhi date on January 17
  • Onus of addressing tribal issues on new Guv?
  • Nupilal Ningshing Lamjel #2 : Gallery
  • Licypriya Kangujam: Nat'l Youth Day Award
  • Barak Festival advocates Peace, Progress
  • 'Yu', not fully liberalised
  • Article 355 equals Governor's Rule ?
  • Calls to vote with conscience
  • Zingtun academy leading by example
  • State Gaan-Ngai @Sagolband #1 : Gallery
  • Is Kuki-Zo community pushing Nagas to edge?
  • Will drive to find-treat-prevent TB continue ?
  • Smart Cities, dustier roads ?
  • ST of NE & Dalits of mainland India
  • That May :: Poem
  • Understanding Red, Yellow, Green
  • Cong posers on Govt aid to SoO group
  • Culturals @Tri-Nation Football #1 : Gallery
  • Gaan-Ngai festival of Kabui/Rongmei
  • 40 Years & 04 Stations- Part IV (Madras)
  • Manipur Gold: 34th Sr Natl Sepaktakraw C'ship
  • Public Health Risk Management Training
  • The Power of Poppy - 64 :: Poem
  • The Science of Success #4
  • Hingminashi Eikhoi : Call for unity in diversity
  • A Hymn for Goddess Emoinu
  • Are the foods we eat, correct ?
  • Gangtok, Sikkim (1983 till 1988) : Gallery
  • The Taste of Dreams : Teaser Unveiled
  • Be a child of courage & conquer obstacle
  • Hans Renal Care Centre in Guwahati
  • Focus on pre-May 3, 2023 period
  • Conundrum over the genesis of crisis
  • Misna Chanu aids to Jiribam IDPs : Gallery
  • North-East Students invited to JEE Main 2025
  • Empower the State else avoid blame on CM
  • Obituary : Thaunawjam Brajamohon
  • Hope :: Poem
  • An introduction to Rabies (Hydrophobia) #3
  • Winter makeup tips for dry skin
  • Imphal, Delhi still groping in the dark
  • Tension over assault case, land claims
  • Mega Protest Rally, end AFSPA #2: Gallery
  • Foundation: Manipur Press Club #1 : Gallery
  • Ningol Chakkouba @ Delhi #3 : Gallery
  • Indigenous Pottery Making @Imphal : Gallery
  • AIR Radio Imphal Station - Live streaming
  • Nupi Lal Memorial @Pune #2 : Gallery
  • The historical account of Kabaw Valley #3
  • Featured Front Page Photo 2024 #6: Gallery
  • E-Pao.net : 25th Anniv & 2025 Wishes
  • Protest @Delhi - Murder of Meiteis #2: Gallery
  • "Connections", art exhibitt @ DC : Gallery
  • Observance of Thang-Ta Day #1 : Gallery
  • Mera Chaorel Houba #4 : Gallery
  • Nupi Lal Memorial @Pune #1 : Gallery
  • Meitei Mayek Tamba : Online Classroom #5
  • Indigenous People Cultural Fest #1 : Gallery
  • Maibi Jagoi @ Mera Houchongba: Gallery
  • Mega Protest Rally, end AFSPA #1: Gallery
  • Ta Ta TabuHtoN :: Seireng
  • Downloadable Manipuri Calendar :: 2025
  • GHOST of PEACE :: Download Booklet