Impact of sequential herbicides application on crop productivity, weed and nutrient dynamics in soybean under conservation agriculture in Vertisols of Central India (original) (raw)
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2016
A field experiment was conducted during kharif season of 2015, at the Research Farm, Department of Agronomy, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur (M.P.) to assess the efficacy of different post emergence herbicides on soybean varieties (Glycine max L.). The investigation was aimed to study the efficacy of herbicides as applied post-emergence for weed control in different soybean varieties and to determine economic feasibility of treatments. Application of weed control treatments Imazethapyr, Quizalofop-pethyl, Chlorimuron ethyl and Quizalofop-p-ethyl +Chlorimuron ethyl and weedy check were laid out in Split Plot Design with three replications. The experimental area has the natural weed flora comprising of grassy as well as broad leave weeds. 15 treatments comprised three (main plot treatments) variety JS 20-29, JS 20-69 and JS 20-34 and 5 (sub plot treatments). The variety JS 20-29 with application of Quizalofop-p-ethyl+Chlorimuron ethyl@ (50g+9g/ha) was given maximum ...
Performance of herbicides on effective weed management in soybean (Glycine max) crop
The Indian Journal of Agricultural Sciences
Field experiment was conducted to study the efficacy of different post-emergence herbicides in the soybean (Glycine max (L.) Merr.). The selected herbicides were applied individually or in combination in soybean. A series of experiments were conducted during 2013 to 2017. Application of quizalofop-p-ethyl + chlorimuron ethyl and fenoxaprop-p-ethyl + chlorimuron ethyl along with surfactant at 15 days after sowing (DAS) were found effective herbicides for control of broad leaf weed and grasses in soybean crop. It was observed that post-emergence application of quizolofop-p-ethyl (50 g a.i.) + chlorimuron ethyl (6 g a.i./ha) significantly reduce the weed population (8/m2), weed dry matter (2.3), weed index (0) and highest weed control efficiency (92.9%) and grain yield (1.77 t/ha) at 45 DAS followed by fenoxaprop-p-ethyl (50 g a.i.) + chlorimuron ethyl (6 g a.i./ha) compared to other treatments. Application of quizolofop-p-ethyl (50 g a.i.) + chlorimuron ethyl (6 g a.i./ha) was found t...
Efficacy of early post-emergence herbicides against associated weeds in soybean
Indian Journal of Weed science, 2013
Soybean has emerged as a potential crop for changing the economical position of the farmers in India particularly in Madhya Pradesh. Although ecological condition of the state are congenial for soybean production but the yield is substantially low, despite of best management practices. The poor weed management practices deprive the crop of its major requirement of nutrients, soil moisture, sunlight and space which results poor crop growth and yield. Being a rainy season crop, it has high yielding capacity but weed infestation is one of the major constraints in soybean cultivation (Bhan et al. 1974). The weed, if not controlled during critical period of weed crop competition, there may be reduction in the yield of soybean from 58-85% depending upon type and weed intensity (Singh and Singh 1987, Kolhe et al. 1998). Looking to the present need of post-emergence herbicides for higher soybean yield, this study was undertaken.
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A field experiment was conducted on medium black calcareous clayey soil at Junagadh (Gujarat) during Kharif 2018-19 and 2019-20 to study the effect of post emergence herbicides and their mixture on growth, yield and quality of Soybean (Glycine Max L.). The experiment comprising 12 treatments of various combinations of herbicides were replicated thrice in a randomized block design. The experimental results revealed that next to the weed free, IC & HW at 15 and 30 DAS, pendimethalin 900 g/ha as pre-emergence fb IC & HW at 30 DAS, pendimethalin 900 g/ha as pre-emergence fb pre-mix propaquizafop + imazethapyr 50 + 75 g/ha at 30 DAS and pendimethalin 900 g/ha as pre-emergence fb pre-mix sodium acifluorfen + clodinafop-propargyl 80 + 165 g/ha at 30 DAS enhanced growth parameters viz., plant height, branches/plant, number and dry weight of root nodules/plant, dry matter/plant yield attributes like, number of pods/plant and ultimately gave higher seed and stover yields along with improved q...
Bioefficacy of post-emergence herbicides in soybean
Indian Journal of Weed science, 2012
In soybean, weeds are controled by cultural, mechanical and chemical methods either alone or in combination of more than one methods. Weed management through manual weeding or hoeing although effective in reducing weed competition but it is not free from several limitations such as non-availability of sufficient manpower during peak periods, high labour cost, time consuming and not feasible under heavy soils and high rainfall areas. Moreover, mechanical weeding disturbs the physical conditions of the soil and cause mechanical injury to roots and shoots. To overcome these problems, weed control in soybean by chemicals is preferred, which is effective, cheaper and many times faster than the conventional methods. A field experiment was conducted during rainy season of 2009-10 at Research Farm, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur (Madhya Pradesh). The soil of the experimental field was sandy clay loam in texture, neutral in reaction having 0.68 per cent organic carbon. Th...
Journal of Pharmacognosy and Phytochemistry, 2017
The experiment was laid out tostudy on ‘Effect of Different Herbicides on Weed intensity and dry weight under rain-fed Condition of Central India in Soybean [Glycine max (L.) Merrill]’. The experiment was laid out in “randomized block design” with nine treatments, and replicated thrice. The major weeds viz; Echinochloacolonumand Commelinabenghalensis among the monocots and Digeraarvensis, Phyllanthusniruri, Trianthemamonogyna,Corchorusolitorious, andLeucasasperaamong dicots were present whereas Cyperusrotunduswas only sedge present in the experimental area. The relative density of dicots was 65.17% at harvest while monocots were to the extent of 34.82% of total weed population. All the herbicidal treatments and hand weeding reduced the weed intensity as compared to weedy check. Hand weeding twice was most effective and recorded minimum weed intensity among all the treatments. The result indicated that pendimathalin and imazethapyr + imazamox (Odyssey) was effectively reduced the pop...