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A complete remedy for Brown bast

The picture above shows that the movement of Latex is from root to leaves. Carbohydrates from leaves will reach the roots through phloem to grow roots.

The following points are a few findings from experiments and experiences to prove that magnesium deficiency is the reason for “Brown bast”.

1. At the initial stage of tapping one or two rubber trees effected by brown bast. After giving a long rest dry bark forms from bottam to higher level mainly up to the union of branches.

2. After one year of tapping the DRC at tapping panel was low and the DRC over the tapping panel was high cut on bark.

3. After three years of tapping a few trees effected pink disease with a flow of high DRC at the level of union of branches. A few trees were effected by patch canker on higher part of rubber trees.

4. After the completion of ‘A’ panel and the tapping began on ‘B’ panel a portion of bark with empty milk vessels at the hight of upper level of ‘A’ panel was felt.

5. To remove the high DRC latex from the upper bark a trial of two tapping panels on ‘B’ panel both downward and upward was done at the same day and procured more yield. This trial failed to bring the DRC of upper level to lower level.

6. At the begining of brown bast a trial done to bring the high DRC latex from upper portion with an application of ethephon (stimulant) by a 2 inch width from top to tapping level also failed to do so.

7. To reduce the effects of Brown bast with the lace application of ethephon on tapping panel it was found that thick dry bark separated from stem  including those with lower untaped bark.

8. By the lace application of ethephone on RRIM 600 it was felt that Brown bast occured fast.

9. A trial done in RRIM 600 with a tapping panel from left lower to right higher level, got a best result due to the flow of latex from right lower level to left upper level approximately 2 to 7 degrees.

10. On a scratch on new bark green bark was available on yielding trees. But the new bark of brown bast effected trees was without green colour on a scratch.

11. Dr.Thomas Varghees adviced to apply magnesium which is the metalic constiuent of chlorophyll to build or to maintain green bark on Rubber trees.

12. On a trial in summer rain for few trees with the application of magnesium sulphate over ash of burned leaves around trees resulted in good increase in dripping/high yield.

13. By the application of factomphos, potash and magnesium sulphate the dripping rate reduced in rainy season with more coagulating agents in latex and it was a failure.

14. The advice of a Botany teacher that magnesium will react in acidic soil by applying chemical ‘N’ (nitrogen) and the same was agreed by Dr.Thomas Varghees.

15. A trial done on a tree of Nandakumar who is a neihbour and rubber cultivator by giving rest for Brown bast effected portion and started downward tapping at the hight over 8 feet with the help of a small lader. The successful result was achieved by this way of tapping to treat brown bast.

16. Many of the plantations are the victims of dry bark on stem including untaped areas due to the defficiency of magnesium. Magnesium applied trees showed greenish stem with thin dry bark.

17. By the application of magnesium sulphate in November 2006 the result appeared in January 2007. The increased pressure by downward flow through phloem with carbohydrates and upward flow of latex in milk vessels with high DRC resulted in visible leakage of high drc latex at the level of branch union only for magnesium applied trees. Due to summer it will not result in pink disease. Productivity increased by application of magnesium sulphate.

From the above experiments it is felt that magnesium is capable to protect Rubber trees from brown bast. Magnesium defficiency occurs through droubt, acidic soil, organic peat soil, harvesting etc. Brown bast is a disease called “Necrocis” with dead tisues and by the application of magnesium with carbonate or sulphate is capable to maintain live tisues. Nuetrients water etc from soil are moving upwards to the leaves through zylem and the availability of sunshine, carbon from carbon di oxide, oxygen and hydregen from water will prepare carbo hydrates at clorophyll of green leaves. Carbo hydrates moves through phloem over cambum to grow the roots. The magnesium is available in all parts of the tree and it is known as the carrier of phosphorous. After the growth of roots balance items will move up to the lowest branches and leaves. The photosynthesis through the bark of the stem helps to store food in stem which is capable to give latex. If magnesium is defficient the leaves of lower level branches will change the colour to yellow, dry and fall down. In conclusion the movement of latex is from root to leaves and not from leaves to root. So many practical evidences are vailable to prove it.

Nandakumar with the brown bast treated rubber tree

Nandakumar with the rubber tree recovered from Brown bast.

An advance information is available that rain fall will be low in 2007. Thus the application of magnesium sulphate will increase production and will protect rubber trees from brown bast.

9 comments to A complete remedy for Brown bast

  • drrajgopal

    I shall experiment on few trees.

  • The following letter received from NIF
    reply-to [email protected]
    [email protected],
    [email protected]
    date Jan 6, 2007 12:12 PM
    subject A remedy for brown blast
    Dear Mr. Chandrashekar,

    Greetings from NIF and a very Best wishes for 2007.

    We appreciate your efforts in developing a remedy for controlling blast
    in paddy. Blast happens to be one of the major problem that effects the
    yield of the plantation drastically. We would be doing the detailed
    literature review on the practice mentioned by you to try and find out
    the novelty and the effectiveness of your practice against other
    prevalent practice followed by the farmers. The report of the same will
    be sent to you in due course of time and in the meanwhile it would be
    great if you could possibly mail us details about yourself and the
    support and the advice seeked / received by you during the entire process.

    The fifth NIF biennial competition for scouting unaided technological
    innovations and traditional knowledge is underway and last day for
    receiving entries is 31 Jan.’07. We would like you to spread the word
    about NIF in and around your region, help us in searching the hidden
    gems of the society by sending us the innovations or details of the TK
    holders in your region, and become a valued scout.

    With Best Wishes and Regards


  • i am extremely happy to read about your experiment for controlling problem of blast in rubber.

    pl keep up the experimental spirit of yours

    greetings from Honey Bee network


  • Thank you very much for the comment of Prof. Anil K Gupta of NIF.

  • The following is a letter send to the excellency President of India.
    A finding of a farmer to avoid Brown bast

    from കേരളഫാര്മര്/Keralafarmer hide details Jan 15 (3 days ago)

    to President of India
    bcc “Sajan Peter I.A.S”
    date Jan 15, 2007 9:15 AM
    subject A finding of a farmer to avoid Brown bast
    A farmer from Kerala submitting few points before the excellency President of India.

    Sir after a long break I am sending this valuable finding against “brown bast” decease and its remedy from my experiments and experiences. A blog published by me in the name Indian Natural Rubber with a latest post for A complete remedy for brown bast which is not proved by any of the scientists in the World. Without any academic knowledge I got this gain from my practical experiments. The coming year will face low rain fall is an advance information by the concerned. The brown bast is a reason for low production of Natural Rubber. Scientists of Indian Rubber Board says that latex is coming from leaves to bottom, but I felt that carbo hydrates is coming from leaves to roots and latex is flowing from roots to leaves over phloem.
    Sir I am seriously expecting a valuable reply from the excellency the President of India.
    I am sorry for any mistakes in English due to my Metric qualification.

    Thanking you with anticipation

    S.Chandrasekharan Nair
    Shri Raghav, Perukavu, Peyad-PO
    Thiruvananthapuram 695 573
    Ph. 0471 2283033 Mob. 9447183033

    Nobody to accept me on this findings on brown bast. Thus I stoped all out going mails except to friends and relatives till further decision.

  • Dear Sir,
    Nice to see the experiments to help out our Farmers. I would like to know the quantity of MAGNESIUM SULPHATE (MgSO4.7H20) required in this year in kerela. Waiting for your quick response.
    Thanks & Regards,
    Amit Jain.

  • Dear Amith Jain,
    At the initial stage of tapping magnesium requirement is very low. After three years of tapping magnesium requirement per tree is 250 grams in this summer rain to overcome the droubt and to save the rubber trees from brown bast. But it is necessary to bring the pH of the soil above 7. With out digging soil dry leaves are available after seasonal leaf fall can convert as ash above pH 8 by controlled burning which is suitable to apply magnesium. Acidic soil is not suitable to apply magnesium and it will provide a negative result. The Indian Rubber Board the only one source to agree and publish this thing among farmers. (Sorry for my poor English)

  • ajit.g.a


  • Sunny Nah

    May I have the results on the brown bast cure as I am trying to help a farmer after his trees were abused ethrel.
    Many Thanks