The Effects of Calcium and Naphthalene Acetic Acid Sprays on Cracking Index and Natural Rain Cracking in Sweet Cherry Fruits
1992 Volume 61 Issue 3 Pages 507-511
Details
1992 Volume 61 Issue 3 Pages 507-511
The effects of spraying sweet cherry trees with calcium nitrate and naphthalene acetic acid (NAA) and their combination during the rainy season were investigated.
1. Spraying with 0.5% calcium nitrate solution significantly reduced the cracking index of 'Napoleon' sweet cherries and the percentage of cracked fruits under rain without any visble residue and damage from the chemicals.
2. Application of NAA at 0.5, 1 and 2 ppm on 'Satohnishiki' reduced the cracking index and the percentages of cracked fruits to 15 to 30% and 13 to 40% of the control, respectively. In 'Napoleon' sprayed with Ca (NO3)2 and NAA, the cracking index and % cracked fruit decreased to 20 to 38% and 26 to 66%, respectively.
3. Spraying with the combination of the 2 reagents more effectively reduced the cracking of 'Napoleon' than did either reagents as a single spray; and the minimum value of the index and the % cracked fruits was about one eighth of the control.
