Duo technology is based on salicylic acid and gives improved seed germination, root volume and increased stress and disease tolerance. It is incorporated in our Vertmax Duo turf pigment and grass colorant. It is also being trialled as an additive in a new range of innovative soil wetting agents. Both salicylic acid and Phthalocyanine green have turf health benefits. Salicylic acid has been used for hundreds of years as "witch hazel" and in plants helps increase stress tolerance to drought and disease. It is commonly found in aspirin but you would need to dissolve over 150 aspirin in a litre of water to get the equivalent rate of this product. Phthalocyanine green is used as a grass colourant and turf pigment but has the property of being able to filter out damaging light that can be detrimental to turfgrass in the summer months. In combination these products have been found to increase lateral root growth and stress tolerance on turfgrass plus increase germination rate.