| abstract |
The invention is directed to a controlled-release device for horticulture such as a plant pot, rod, stick, tablet, coating or the like, said device comprising a biodegradable composition comprising a bioactive component and a biodegradable matrix, wherein the biodegradable matrix comprises a natural polymer (e.g. a polymeric carbohydrate) and a biopolyester. The invention is further directed to a method for preparing the biodegradable controlled-release device by: a) providing a masterbatch comprising the biopolyester and the bioactive component and compounding said masterbatch; followed by b) blending the compounded masterbatch with a biodegradable compound comprising the polymeric carbohydrate to provide a dry blend and processing said dry blend to provide the device. |