Effect of growth regulator and nutrients spray on control of fruit drop, fruit size and quality of ber under sub-montane zone of Punjab
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Society for Promotion of Horticulture
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The effect of foliar spray of plant growth regulators and nutrients on fruit drop, fruit size and quality was studied in ber cv Sanuar-2 at Krishi Vigyan Kendra, Hoshiarpur, Punjab Agricultural University, Ludhiana, during 2005-2006. Plants were sprayed with NAA (20, 30 or 40 ppm), KNO3 (0.5, 1.0 or 1.5%) and ZnSO4 (0.3, 0.4 or 0.5%) during the last week of October and again superimposed in the last week of November. All the treatments resulted in decreased fruit drop compared to control. Minimum fruit drop (69.6%) was recorded with application of NAA (30 ppm) while maximum was recorded in control. Plants sprayed with KNO3 (1.5%) exhibited maximum fruit size, fruit weight while this was minimum in control trees. Palatability rating of fruits was maximum with KNO3 (1.5%) which also exhibited maximum fruit size, fruit weight and minimum was observed in control trees besides producing fruits with on attractive colour. Total soluble solids were not affected by treatments. Maximum vitamin C (104.2 mg/100 g pulp) content was observed in NAA (30 ppm), followed by KNO3 (1.5%) treatment. Results indicated that NAA (30 ppm) spray was better for fruit retention; however, fruit quality in terms of size, colour and palatability rating was better with KNO3 (1.5%).
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