Ecology, Environment and Conservation Paper

INFLUENCE OF MODIFICATION OF MORPHOFRAME THROUGH ETHYLENE AND MALEIC HYDRAZIDE ON GROWTH AND YIELD OF COTTON HYBRIDS

Dinesh P. Nawalkar, V. Kumar, Y. G. Ban and A.V. Narwade

Abstract

A field experiment were conducted at Main Cotton Research Station, NAU., Surat during two consecutive years 2011-12 and 2012-13 to study the influence of modification of morphoframe through use of Ethylene and Maleic hydrazide on growth and yield of cotton hybrids. The results revealed that application of Ethylene 45 ppm at squaring stage and Maleic hydrazide 500 ppm at 85 days after sowing (DAS) recorded significantly higher number of mainstem nodes, sympodia, monopodia, bolls and seed cotton yield. Application of Ethylene and MH singly also increased number of mainstem node, sympodia, monopodia, bolls and seed cotton yield over untreated control but not to the level of two chemicals together. Ethylene application significantly enhanced plant height as compared to untreated control whereas that of MH reduced the same. Amongst the hybrids, Vikram 5 (BG-II) recorded significantly higher number of mainstem node, sympodia, monopodia, bolls and seed cotton yield.