Ecology, Environment and Conservation Paper

EFFECT OF VARIOUS GROWTH REGULATORS ON VEGETATIVE PARAMETERS OF STRAWBERRY (FRAGARIA X ANANASSA DUCH.).

V.C. Vishal, D. Thippesha, K. Chethana, B. G. Veeresha, B.M. Maheshgowda and C. Puttanna

Abstract

A field experiment was conducted to know the effect of the growth regulators on vegetative parameters of strawberry at College of Horticulture, Mudigere, Karnataka during 2014-2015. Four growth regulators namely NAA (15 and 20 ppm), GA3 (100 and 125 ppm), CCC (1000 and 1250 ppm) and BA (100 and 125 ppm) were tested during the course of experimentation. Among the various treatments imposed 125 ppm GA3 proved to be best with respect to plant height (22.39 cm), number of trifoliate leaves per plant (28.33), length of trifoliate leaves (11.64 cm), breadth of trifoliate leaf (15.88 cm), plant spread (29.70 cm east- west and 24.63 cm north- south) and number of runners per plant (5.87). Whereas, all the above mentioned parameters were found to be minimum with the application of CCC 1250 ppm. The maximum leaf area (128.53 cm2), leaf area index (3.70), absolute growth rate (0.43 g/plant/ day), crop growth rate (4.77 g/m2/ day) was observed with the spraying of 125 ppm GA3-, whereas maximum net assimilation ratio (0.250 mg/ cm2/ day) was recorded with the spraying of 1000 ppm CCC. The maximum total chlorophyll content (2.29 mg/ g of fresh weight) was recorded in the treatment CCC (1000 ppm).