Pencycuron (Monceren) is a new active ingredient from Bayer AG Leverkusen. Pencycuron is a fungicide with contact effect used as seed dressing in potatoes with a specific effect against black scurf (Rhizoctonia solani). A large number of field trials carried out in several countries in western Europe have proven that pencycuron is setting a new standard for the control of black scurf (Rhizoctonia solani) in potatoes achieving a considerable increase in yield and tuber quality of the crop. Pencycuron has also shown its superiority in comparison to other seed dressings in the market. Furthermore the treatment improves the size and shape of the tubers as shown by the number of tubers having size 35-55 mm with lower Sclerotinia darnage in the harvested crop. pencycuron was launched in the Danish market in 1993 as Monceren DS 12,5, a dry powder formulation used with a dosage of 200 g per hkg seed potatoes. In 1994 pencycuron will also be available in Denmark as Monceren FS 250, a liquid formulation used with a dosage of 60 ml per hkg seed potatoes. This formulation is sprayed on the seed tubers while dropping from the potato planter to the soil using special equipment
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