Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract Full Text

Effect of pre and post-emergence herbicides on weed infestation and productivity of soybean.

Abstract

The experiment was laid out during kharif season of 2013 at the Research cum Instructional Farm, Indira Gandhi Krishi Vishwavidyalaya, Raipur (CG.) to find out the effect of newly released molecules sulfentrazone with other released molecules using Randomized Block Design, comprising four replications and eight treatments. The results showed that maximum dry matter accumulation plant-1 (18.47 g plant-1), yield (27.82 q ha-1) and yield attributing characters viz., number of pods plant-1 (92.8), number of seeds plant-1 (263.5) of soybean were recorded under treatment hand weeding twice at 20 and 40 DAS, however these were found at par with treatment Sulfentrazone @ 300 g a.i. ha-1 as PE+Imazethapyr @ 100 g a.i. ha-1 as PoE recorded 18.21 g plant-1 dry matter accumulation, 27.79 q ha-1 seed yield, 92.3 pods plant-1 and 252.5 seeds plant-1. Maximum weed index was noticed under untreated control which was 46.33%, whereas, minimum weed index (0.11) was registered under Sulfentrazone @ 300 g a.i. ha-1 as PE+Imazethapyr @ 100 g a.i. ha-1 as PoE. The highest weed control efficiency (99.18%) was noted under treatment hand weeding twice at 20 and 40 DAS followed by the treatment Sulfentrazone @ 300 g a.i. ha-1 as PE+Imazethapyr @ 100 g a.i. ha-1 as PoE with 97.35% WCE. The highest net returns (Rs. 1,03,585/- ha-1) and benefit:cost ratio (4.8) were obtained under treatment Sulfentrazone @ 300 g a.i. ha-1 as PE+Imazethapyr @ 100 g a.i. ha-1 as PoE followed by hand weeding twice at 20 and 40 DAS with Rs. 1.03,532/- ha-1 net returns and 4.6 benefit:cost ratio.