The Effects of Cluster Tip Reduction and Boric Acid Applications on Yield and Yield Components of Alphonse Lavallee Grape Cultivar

Viticulture is a very important agriculture branch in Turkey. This study was conducted on Alphonse Lavallee grape variety (Vitis vinifera L.) in Konya province in Turkey in 2016. The cultivar is 7 years old and grown on 110 R rootstock. In this research, it was investigated whether the applications of Control (C), 1/3 Cluster Tip Reduction (1/3 CTR), 1/6 Cluster Tip Reduction (1/6 CTR), 1/9 Cluster Tip Reduction (1/9 CTR), 1/3 CTR+Boric Acid (BA), 1/6 CTR+BA, 1/9 CTR+BA on yield and yield components of Alphonse Lavallee grape variety. The results were obtained as the highest berry weight (5.23 g) with 1/9 CTR+BA and (5.32 g) with 1/9 CTR applications; as the highest maturity index (45.14) with 1/9 CTR application; as the highest must yield (673.33 ml/kg) with 1/6 CTR+BA, (686.67 ml/kg) with 1/9 CTR+BA, (693.33 ml/kg) with 1/3 CTR+BA, (703.33 ml/kg) with 1/6 CTR and (703.33 ml/kg) with 1/9 CTR applications. No significant effects were found statistically on fresh grape yield and cluster weight values. To increase berry weight and maturity index in Alphonse Lavallee grape variety can be recommended 1/9 CTR application.