Effect of plant growth regulators and micronutrients on yield and yield components in okra.

P Surendra, CM Nawalagatti, MB Chetti, SM Hiremath - 2006 - cabidigitallibrary.org
2006cabidigitallibrary.org
A field experiment was conducted in Dharwad, Karnataka, India, during the kharif of 2002 to
study the effects of plant growth regulators and micronutrients on the yield and yield
components of okra. NAA (20 or 40 ppm), GA3 (25 or 50 ppm), Miraculan triacontanol (1000
or 2000 ppm), MnSO4 (0.3 or 0.6%), MgSO4 (0.5 or 1.0%) and FeSO4 (0.25 or 0.50%) were
sprayed to the foliage at 40 and 60 days after sowing. Among the growth regulators, NAA at
20 and 40 ppm (13.19 and 14.00 t/ha), and GA3 at 25 and 50 ppm (15.81 and 18.69 t/ha) …
Abstract
A field experiment was conducted in Dharwad, Karnataka, India, during the kharif of 2002 to study the effects of plant growth regulators and micronutrients on the yield and yield components of okra. NAA (20 or 40 ppm), GA3 (25 or 50 ppm), Miraculan triacontanol (1000 or 2000 ppm), MnSO4 (0.3 or 0.6%), MgSO4 (0.5 or 1.0%) and FeSO4 (0.25 or 0.50%) were sprayed to the foliage at 40 and 60 days after sowing. Among the growth regulators, NAA at 20 and 40 ppm (13.19 and 14.00 t/ha), and GA3 at 25 and 50 ppm (15.81 and 18.69 t/ha) gave the highest fruit yields. The latter treatments also recorded the greatest number of flowers per plant (23.2 and 26.8), total number of fruits per plant (18.4 and 22.1), harvest index (50.4 and 65.5%), fruit length (21.3 and 23.4 cm), total dry weight of fruits (66.19 and 90.49 g per plant), number of seeds per fruit (51.0 and 55.0), seed weight per fruit (4.55 and 6.15), net returns (77 701 and 93 481 rupees/ha), and benefit cost ratio (4.52 and 5.00). Among the micronutrients, FeSO4 recorded the highest fruit yield (12.78 t/ha) and total number of flowers per plant (18.1).
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