Effects of Syncron® and Nitroactive® on flowering and ripening in sweet cherry
Dormancy breaking agents are used in fruit tree species to induce budbreak in situations of insufficient winter chilling or to advance and synchronize fruit ripening. In order to test whether a new product, Syncron® and Nitroactive®, may have positive effects on flowering and ripening time, different treatments were evaluated in two sweet cherry cultivars, 'Earlise' and 'Lapins' grafted on 'Santa Lucia 64' rootstock. A combination of Syncron 2% and Nitroactive 20% was applied at three dates during dormancy in two consecutive years with different winter weather conditions. In the first year, the treatments advanced the time of flowering and ripening in 'Earlise', but effects were less remarkable in 'Lapins'. In the second year, the effects of the applications were more appreciable in 'Lapins' than in 'Earlise'. The different effects observed between years in both cultivars treated at the same dates are discussed in terms of the chilling accumulated at each date and the stage of bud development in which the applications were made.
Rodrigo, J., Espada, J.L., Bernad, D., Martin, E. and Herrero, M. (2017). Effects of Syncron® and Nitroactive® on flowering and ripening in sweet cherry. Acta Hortic. 1161, 389-394
Prunus avium, chilling accumulation, dormancy, fruit set