Performance of varieties with different dates of sowing and spray of growth regulators and their interaction on growth and yield of Dolichos Bean (Lablab purpureus L.) during offseason under shade net

Abstract

The present investigation entitled “Performance of varieties with different dates of sowing and spray of growth regulators and their interaction on growth and yield of Dolichos Bean (Lablab purpureus L.) during offseason under shade net” was carried out during summer 2014-15 and 2015-16 at Horticultural Research Station, Ambajipeta, East Godavari District of Andhra Pradesh. The experiment was laid out with 36 different treatment combinations in a Factorial Randomized Block Design (FRBD) each replicated thrice in open field. The experiment was carried out with four varieties viz., Arka Jay, Arka Amog, Arka Sambhram and Arka Sowmya with three different dates of sowing viz., December 15th, January 1st and January15th with foliar spray of growth regulators viz., NAA 25 ppm, Triacontanol 2 ppm and control. The data were recorded on various growth, and yield parameters and the data were statistically analyzed based on ANOVA. Arka Amog recorded significantly highest plant height (66.93 cm)) number of buds per node (4.26) whereas Arka Sowmya (V4) recorded significantly highest leaf area (901.9 cm2), pod weight (4.52g) and highest pod yield per ha (132.06 q) under shade net. January 1st sown crop recorded significantly the highest plant height (68.22cm) ,leaf area (870.1 cm2) number of buds per node (4.17), pod weight (4.37g)and highest pod yield per ha (129.26q) and number of days for 50 per cent flowering (40.60) was less in December 15th sowing. Triacontanol @2 pm foliar spray recorded significantly the highest leaf area (911.0 cm2), number of buds per node (4.20), pod weight (4.37 g) and pod yield (125.72q/ha. Arka Sowmya recorded the highest pod yield per hectare (163.27q) when sown on January 1st and sprayed with Triacontanol 2 ppm foliar spray (V4S2G2).