Integrated weed management in Kharif blackgram

Abstract

A field experiment was conducted on medium black calcareous clayey soil at Pulses Research Station, Junagadh Agricultural University, Junagadh during three seasons of 2011-12, 2012-13 and 2014-15 to study the efficacy of pre-and post-emergence herbicides in Kharif blackgram (cv. GU-1). The quizalofopethyl 40 g/ha as post-emergence (PoE) at 20 days after seeding (DAS) + hand weeding (HW) at 40 days after seeding (DAS) and pendimethalin 900 g/ha as pre-emergence (PE) + hand weeding (HW) at 40 DAS were found equally effective to the weed-free check in controlling weeds and improving growth and yield attributes and ultimately seed yield (1.14 and 1.13 t/ha) and straw yield (1.26 and 1.33 t/ha) of blackgram. These treatments also recorded higher weed control efficiency (65.3-63.1%), herbicide efficiency index (81.1-82.3%), lower weed index (9.1-9.7%) and minimum weed dry biomass (273.9-291.7 kg/ha) and higher net returns (` 21,230 and ` 21,162 /ha). Integrated weed management practices with herbicides as a component were found effective and economical under south Saurashtra agro-climatic conditions of Gujarat.

Effect of Integrated Weed Management on Yield, Quality and Economics of Summer Sorghum (Sorghum bicolor L.)

“…Higher gross returns along with the lowest cost under treatments T 1 , T 3, T 4 , T 5 and T 6 might be responsible for higher net return and B: C ratio. This is in conformity with the findings of Kumar et al, (2012), Mishra et al, (2012), Priya and Kubsad (2013), Patel et al, (2014) and Thakur et al, (2016).…”

Weed management influence on crop-weed competition in sorghum under South Gujarat conditions

“…moisture, nutrient, light and space resulting in higher number of weeds and dry weed biomass. Earlier workers (Priya and Kubsad 2013 and Patel et al 2014) have also reported the same for unweeded control treatment.…”

“…Patel et al (2006) has justified the similar results in maize crop with the longer persistence of atrazine and pendimethalin up to harvest of crop. While, the similar efficacy of preemergence herbicide with one hand weeding or interculturing in sorghum are supported by Kumar et al (2012), Priya and Kubsad (2013) and Patel et al (2014).…”

Response of Black Gram (Vigna Mungo L.) to Integrated Weed Management and Its Effect on Weed Dynamics

“…Cynodon dactyon, Dactylactenium aegyptium, Cyperus rotundus, Cyperus iria, Amaranthus viridis, Digera arvensis and Parthenium hysterophorus were Predominant weed species. The observations on these weed species during the investigation followed similar trend with those reported by Jakhar et al (2015) and Patel et al (2017).…”