Effect of bio-activators on the tuber yield and tuber size of potatoes

Two bio-activators, the Crop-set and the ISR-2000 were sprayed on the potato plants before flowering in order to increase tuber set and tuber size in a field trial conducted at Bornova, Izmir-Turkey in 2009 and 2010. The Crop-set increased the number of tubers per plants, plot yield, tuber width over the control in 2009 and 2010. The ISR-2000 had the highest single tuber weight such as 36.7 g in 2009 and 35.9 g in 2010. It could be concluded that bio-activators could be used in the minituber propagation stage in order to increase tuber number and tuber size in a seed potato program.