engleski

Yield and fruit quality of Cripps Pink variety under different color insect-protecting nets in Baštica, Croatia

It was important to determine the possibility to use insect-protecting nets in apple orchard by measuring its effect on fruit quality of apple variety Cripps Pink grown in Baštica. The trial with four types of nets (white with wide mesh size (WW), and red (R), white (WN) and yellow (Y) color nets with narrow mesh size) and control (C), covering four trees each, was set from June until harvest of 2015 (1st harvest on Sept. 2nd for WW and R and 2nd harvest on Sept. 11th for WN and Y). Yield was higher at WW, R and WN (5.28-8.83 kg/tree) than at Y and C (3.41 kg, 3.79 kg). The portion of 70-80 mm diameter fruits for WW, R and C were similar (58-76%), while WN and Y (35%, 41%) had less than C (53%). Portion of fruits having 50-75% of skin color (3rd class fruits) was higher at WW (51%) than R (37%) and C (38%) and WN, Y and C were similar (17-27%) while 75-100% of skin color (4th class fruits) were higher at C (46%) than WW (11%) and R (21%) and C (46%) was higher than Y (18%), and WN (39%) similar to Y and C. Total acids (TA) were similar at WW, R and C (0.63-0.71%) and lower at Y (0.535%) than at WN and C (0.67%, 0.61%). Sugar content was higher at C (15.84%) than at WW and R (14.81%, 15.11%), and C (16.34%) was higher than WN (15.31%) and Y (15.81%). Sugar/TA was similar at WW, R and C (22.63-24.18), and Y (32.26) was higher than WN and C (23.55, 27.54). Color development, total acids and ripening stage was similar under nets and control and yield was higher under nets than control, except for yellow net, but sugar accumulation was higher in control.

insect nets; Cripps Pink; fruit color; sugar/TA

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