 bio diamond to control diseases improve plant growth and maintain soil fertility bio diamond to control diseases improve plant growth and maintain soil fertility bio diamond the 2021 winner of the gtt guyana innovation prize controls diseases improves plant growth and maintains soil fertility bio diamond is a biocontrol agent which consists of live organisms found in guyana s soils the innovator prof gomathinayagam subramanian expressed my bio diamond is a three in one ecofriendly fertilizer that has a shelf life of six months according to prof subramanian bio diamond has started preliminary testing across the regions of guyana he is hoping that very soon once the necessary testing is done the product will be marketed to the relevant stakeholders andydindial tue 2142023 1054  