scholarly journals Selectivity and Effectiveness of Herbicides in the Grain Sorghum Crop

2019 ◽  
Vol 37 ◽  
Author(s):  
G.V. PIMENTEL ◽  
D.F. GUIMARÃES ◽  
S.G. MOREIRA ◽  
M.O.T. ÁVILA ◽  
I.A. MARTINS ◽  
...  
Keyword(s):  
Weed Control ◽  
Block Design ◽  
Mineral Oil ◽  
Grain Sorghum ◽  
The Other ◽  
Randomized Block Design ◽  
Hand Weeding

ABSTRACT: Over the years, cultivated areas of sorghum have expanded considerably in Brazil. Chemical weed control has become an obstacle due to the scarcity of herbicides registered for the crop. The aim of this study was to evaluate the efficiency of weed control and selectivity of herbicides applied in pre and post emergence in the crop. Two experiments were conducted. In one of them, the hybrid BRS 310 was used while DKB 550 was used in the other. The experiments were performed in the field in randomized block design, evaluating seven treatments with four replications. The used treatments were: 1. Hand weeding, 2. S-metolachlor (1,440 g a.i. ha-1), 3. S-metolachlor (1,440 g a.i. ha-1) + atrazine (2,000 g a.i. ha-1), 4. atrazine (2,000 g a.i. ha-1), 5. atrazine (3,000 g a.i. ha-1), 6. atrazine (2,000 g a.i. ha-1) + mineral oil (0.25%), and 7. atrazine (2,000 g a.i. ha-1) + mineral oil (0.5%). It was verified that post-emergence atrazine was efficient in the weed control and selective to the sorghum crop, not affecting productivity, except in mixture with mineral oil (0.5%). S-metolachlor cannot be recommended in pre-emergence for the tested cultivars because it is not selective, reducing plants and productivity.

Effect of weed control practices on weed dynamics, yield and economics of soybean [Glycine max (L.) Merrill]

2015 ◽  
Author(s):  
K. Nandini Devi ◽  
Kh. Lenin Singh ◽  
CNJS Arangba Mangang ◽  
N. Brajendra Singh ◽  
Herojit Singh Athokpam ◽  
...  
Keyword(s):  
Weed Control ◽  
Dry Matter ◽  
Block Design ◽  
Randomized Block Design ◽  
Glycine Max L ◽  
Chlorimuron Ethyl ◽  
Weed Dynamics ◽  
Hand Weeding ◽  
Quizalofop Ethyl ◽  
Weed Emergence

The experiment was laid out in randomized block design with three replications and eight weed control treatments viz., weedy check, polythene mulching as pre emergence (PE), pendimethalin30EC (PE), chlorimuron ethyl 9g ha-1as post emergence (POE), quizalofop ethyl 50g ha-1 (POE), imazethapyr 100g ha-1 as early post emergence (EPOE), one hand weeding at 40 days after sowing (DAS) and two hand weeding at 20 and 40 DAS. The results showed that polythene mulching had the lowest weed dry matter due to effectively suppression of weed emergence. It was followed by twice hand weeding at 20 and 40 days after sowing. Weed index was found to be the highest with weedy check (42.10%) followed by the pre-emergence application of pendimethalin (19.09%). The effect of herbicide applied as pre-emergence was subdued at this belated stage, which may possibly be on account of longer period after application and restricted effective residual period. Plant height, number of pods per plant and grain yield of soybean was found to be highest in the treatments twice hand weeding at 20 and 40 DAS as well as polythene mulching. However, the net return and B:C ratio was lower in comparison to imazethapyr and quizalofop ethyl due to higher cost of labour and polythene material respectively. On an average, the application of imazethapyr as early post emergence (3.17) and quizalofop ethyl (3.02) gave significantly highest B:C ratio than the other treatments for soybean.

scholarly journals Efficacy of chemical and cultural weed management practices on nutrient uptake in black gram (Phaseolus mungo)

2021 ◽  
Vol 17 (AAEBSSD) ◽  
pp. 121-125
Author(s):  
Kavita D. Rajput ◽  
J. P. Bholane ◽  
A.S. Latkar ◽  
V.M. Bhale
Keyword(s):  
Nutrient Uptake ◽  
Weed Control ◽  
Weed Management ◽  
Management Practices ◽  
Cultural Practices ◽  
Block Design ◽  
Control Treatment ◽  
Black Gram ◽  
Randomized Block Design ◽  
Hand Weeding

The results of the field experiment carried out during kharif season of 2010 at agronomy department farm, Dr.P.D.K.V.,Akola revealed that N,P,K uptake by black gram (Phaseolus mungoL.) and weeds were significantly higher under weed free and weedy check treatments among all of the weed control treatments. The experiment was laid out in Randomized Block Design replicated three times with thirteen treatments, in that chemical and cultural treatments were compared with weedy check and weed free control. Herbicide application in general and pre-emergence application of pendimethalin @1.5kg/ha in particular reduced the nutrients removal by weeds and enhanced the nutrient uptake by the crop followed by cultural practices of two hand weeding at 15 & 30 days after sowing. The pre-emergence application of pendimethalin in @ 1.5 kg/ha recorded highest nutrient uptake in grain (34.92, 6.50, 34.16 NPK kg/ha resp.) and strover (63.26, 10.60, 57.60 NPK kg/ha resp.) among all the weed control treatment except weed free treatment. The crude protein content of grain was the highest with pre-emergence application of pendimethalin @ 1.5 kg/ha (21.65) followed by pendimethalin @ 1.0 kg/ha (21.55).

Development of Efficient Weed Management Practices for Drilled Paddy Production under Gujarat condition

2019 ◽  
Vol 6 (02) ◽  
Author(s):  
R, V Hajari ◽  
R G MACHHAR ◽  
A. K. Mahida ◽  
G D HADIYA ◽  
A K MAHIDA
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Management Practices ◽  
Block Design ◽  
Growth And Yield ◽  
Research Station ◽  
Yield Attributes ◽  
Straw Yield ◽  
Randomized Block Design ◽  
Hand Weeding

To study the weed management in drilled paddy an experiment was conducted at Agriculture Research Station, Anand Agricultural University, Derol Dist: panchmahal, Gujarat during kharif seasons of the years 2012-13, 2013-14 ,2014-15 and 2015 -16 . Ten treatments for weed management were studied in randomized block design with four replications. Results that all the growth and yield attributes except plant height and test weight were significantly influenced due to different weed control treatments. The grain and straw yield of drilled paddy were also altered significant due to weed control treatments. In general, T2 (two hand weeding at 20 and 40 DAS) recorded the highest yield among all. It was, however, at par with three other treatments which included pre and post emergence application of herbicides. Since, the application of Oxadiargyl @ 90 g/ha f/b Bisbyribac sodium @ 25 g/ha at 20 DAS is one among the dual application of herbicide, it can be recommended for drilled paddy in options of two hand weeding.

Effect of different weed control methods to yield of lowland transplanted rice in the Jaunpur district of Uttar Pradesh

2016 ◽  
Vol 1 (02) ◽  
pp. 174-178
Author(s):  
Somendra Nath ◽  
Sandeep Kumar ◽  
Suresh Kumar Kannaujiya
Keyword(s):  
Weed Control ◽  
Rice Yield ◽  
Oryza Sativa L ◽  
Block Design ◽  
Uttar Pradesh ◽  
Control Methods ◽  
Transplanted Rice ◽  
Randomized Block Design ◽  
Manual Weeding ◽  
Hand Weeding

An experiment was conducted during kharif season of 2014 at crop cafeteria form of Krishi Vigyan Kendra, Jaunpur to assess the effect of different weed control methods to yield of low land rice (Oryza sativa L.). Weed competition will reduce rice yield. It has been conducted from 15 June 2014 until October 2014 with variety Pusa Sugandha-5 (It is non basmati variety but aromatic) nursery was done on 15 June and 23 days old seedling were transplanted. The experiment laid out using Randomized Block design with five treatments (A = unweed control (Weedy check), B = manual weeding (Two hand weeding), C = herbicide containing Penoxulam + Cyhalofop- butyl, D = Bispyribac sodium, and E = 2, 4 D + Methyl metsulfuron). The results showed that weed control using herbicides containing Bispyribac sodium and 2.4 D + Methyl metsulfuron showed similar results as manual weed control on rice yield. The maximum weed index was observed in weedy check plots.

scholarly journals Bio-efficacy of tank mixed herbicides for control of complex weed flora in soybean (Glycine max L. Merril)

2016 ◽  
Vol 8 (4) ◽  
pp. 2231-2234
Author(s):  
Mahender Singh ◽  
I. S. Tomar ◽  
J. Morya ◽  
Arjun K. Verma ◽  
R. K. Tripati
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Dry Matter ◽  
Management Practices ◽  
Block Design ◽  
Maximum Yield ◽  
Cost Ratio ◽  
Randomized Block Design ◽  
Chlorimuron Ethyl ◽  
Hand Weeding

A field experiment was conducted at ZARS, Jhabua (M.P.) during kharif 2014 to find out most suitable and efficient method of weed control in soybean. The experiment consisted of nine treatments laid out in randomized block design with three replications. All the weed management practices led to significant reduction in density and dry matter of weeds as compared to weedy check. Two hand weeding (20 & 40 DAS) recorded lowest weed density (4.9/ m2), weed dry matter (22.35 g/m2) with highest weed control efficiency of 59.67% and found at par with the application of Chlorimuron Ethyl @ 9gm /ha + Quizalofop-p-ethyl @ 50 g /ha (density 5.48/ m2, dry matter 26.62 g/m2 and WCE of 51.97%) and Imazethapyr @ 35 g /ha + Imazamox @ 35 g/ha (density 6.13/ m2, dry matter 26.00 g/m2 and WCE of 53.08%). Maximum yield of 1782 kg/ha was recorded in two hand weeding (20 & 40 DAS) closely followed by Chlorimuron Ethyl @ 9gm /ha + Quizalofop-p-ethyl @ 50 g /ha (1723 kg/ha) and Imazethapyr @ 35 g / ha + Imazamox @ 35 g/ha (1697 kg/ha). Reduction in soybean yield in weedy check to be recorded is 38.78 per cent when compared to weed free and 36.68 per cent in comparison to Chlorimuron Ethyl @ 9gm /ha + Quizalofopp-ethyl @ 50 g /ha. However, highest Benefit to Cost ratio is recorded in Chlorimuron Ethyl +Quizalofop-p-ethyl (3.26) closely followed by Imazethapyr + Imazamox (3.22) and Weed free (3.21).

scholarly journals Influence of pendimethalin and hand weeding on mineral composition of maize, cowpea and their intercrop

Bio-Research ◽  
2020 ◽  
Vol 18 (2) ◽  
Author(s):  
Amudalat Ranti Lawal ◽  
Bolaji Umar Olayinka ◽  
Lukman Bola Abdulra’uf ◽  
Emmanuel Obukohwo Etejere
Keyword(s):  
Weed Control ◽  
Mineral Composition ◽  
Active Ingredient ◽  
Field Experiments ◽  
Cropping Systems ◽  
Block Design ◽  
Weed Competition ◽  
Mineral Contents ◽  
Randomized Block Design ◽  
Hand Weeding

Weed competition has been a major challenge limiting crop yield especially in intercropping systems. Information on the use of chemicals for weed control in intercropping systems appears scanty. The aim of this study was to investigate the efficacy of pendimethalin (P) at 1 kg active ingredient/ha, and hand weeding (HW) on mineral contents of the harvested grains and effects of various weed control treatments in maize, cowpea, and their intercrop. Field experiments were carried out during the 2017 and 2018 rainy seasons. The field layout followed complete randomized block design with three replicates. There were eight treatments: Sole Maize/Cowpea + P, Sole Maize/Cowpea + P + 1HW at 3 weeks after sowing (WAS), Sole Maize/Cowpea + P+ 2HW at 3 and 6 weeks after sowing (WAS), Sole Maize/Cowpea weedy check, Intercrop + P, Intercrop + P + 1HW at 3WAS, Intercrop + P + 2HW at 3 and 6 WAS and Intercrop weedy check. It was observed that, P+1HW and P+2HW in both cropping systems have significant effects (p<0.05) and effectively control weed and increase the mineral contents in maize, cowpea, and their respective intercrop. The study revealed that, the mineral composition of maize and cowpea grains were improved by using pendimethalin with supplementary hand weeding. The study recommends that farmers should adopt intercropping maize with cowpea using pendimethalin plus one supplementary hand weeding at 3 WAS.

scholarly journals Efficacy of some weed control methods in soybean during kharif season

2016 ◽  
Vol 8 (1) ◽  
pp. 154-158
Author(s):  
R. Das ◽  
B. C. Patra ◽  
M. K. Mandal ◽  
A. Pathak ◽  
A. K. Dolai
Keyword(s):  
Weed Control ◽  
West Bengal ◽  
Block Design ◽  
Integrated Approach ◽  
Control Methods ◽  
Kharif Season ◽  
Randomized Block Design ◽  
Hand Weeding ◽  
Quizalofop Ethyl ◽  
Polyethylene Mulch

An experiment was undertaken at the C block research farm of Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, to find out the efficacy of some weed control methods in soybean (cv. Bragg) during kharif season of 2011 -12 and 2012-13. The experiment was conducted in randomized block design (RBD) with 8 treatments in 4 replications. Treatments comprised of two different kinds of mulching (paddy straw @ 5 t ha-1 and polyethylene), two herbicides (Flumioxazin @ 30 g a.i. ha-1 as pre-emergence and Quizalofop-ethyl @ 50 g a.i. ha-1 as post-emergence) alone and in combination, twice hand weeding at 25 and 50 days after sowing (DAS), integrated approach of Flumioxazin @ 30 g a.i. ha-1 as pre-emergence along with one hand weeding at 25 DAS and one weedy check treatment. Among the weed control treatments, twice hand weeding at 25 and 50 DAS resulted the highest control of weeds (5.91 gm-2, 6.09 gm-2 at 30 DAS and at harvest respectively) and produced the highest grain yield at harvest (2797 kg ha-1), followed by Flumioxazin @ 30 g a.i. ha-1 as pre-emergence along with one hand weeding at 25 DAS, straw mulch @ 5 t ha-1, polyethylene mulch and combination of Flumioxazin @ 30 g a.i. ha-1 as pre-emergence + Quizalofop-ethyl @ 50 g a.i. ha-1 as post-emergence.

scholarly journals Weed management in kharif rice in new alluvial zone of West Bengal

2018 ◽  
Vol 10 (2) ◽  
pp. 716-722
Author(s):  
K. Ghosh ◽  
K. A. Chowdary ◽  
B. C. Patra ◽  
S. Sardar
Keyword(s):  
Grain Yield ◽  
Weed Control ◽  
Weed Management ◽  
West Bengal ◽  
Block Design ◽  
Dry Weight ◽  
Control Measures ◽  
Randomized Block Design ◽  
Chlorimuron Ethyl ◽  
Hand Weeding

A field experiment was carried out during the Kharif season of two consecutive years 2015 and 2016 at Instructional Farm, Jaguli, Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal with the focal objective to assess the effect of different weed control measures on yield of transplanted kharif rice, IET 4786. Experiment having 3 replications was conducted in Randomized Block Design with nine treatments, namely, T1- Pendimethalin 30% EC + Pyrazosulfuron ethyl 10 % WP @ 675 + 15 g a.i, T2- Pendimethalin 30% EC + Pyrazosulfuron ethyl 10 % WP @ 900 + 200 g a.i, T3- Pendimethalin 30% EC + Pyrazosulfuron ethyl 10 % WP @ 1125 + 25 g a.i, T4- Pendimethalin 30% EC @ 1500 g a.i, T5- Pyrazosulfuron ethyl 10 % WP @ 15 g a.i, T6- Pyrazosulfuron ethyl 10 % WP @ 20 g a.i, T7- Metsulfuron methyl 10 % + Chlorimuron ethyl 10 % WP @ 4 g a.i, T8- Hand weeding and T9- Weedy check. Significant variations were observed on the mixed weed flora as well as on performance of rice under the different herbicidal treatments.Pendimethalin 30% EC + Pyrazosulfuron ethyl 10% WP @ 1125+25 g a.i) was found to be the most effective recording the lowest weed population and weed dry weight with  the highest weed control efficiency (83.5% in 2015 and 79.8 % in 2016) and the highest number of panicles m-2 (215.1 in 2015 and 231 in 2016), number of filled grains panicle-1 (85.39 in 2015 and 115.47 in 2016) and grain yield of rice (3.60 t/ha in 2015 and 5.30 t/ha in 2016). The lowest grain yield(2.20 t/ha in 2015 and 3.40 t/ha in 2016) and the highest weed density were observed in weedy check plots.

scholarly journals Efficacy of Herbicides for Weed Control in Cauliflower (Brassica oleracea var. botrytis L.)

2021 ◽  
pp. 199-204
Author(s):  
K. Choube ◽  
D. K. Raidas ◽  
M. L. Jadav ◽  
N. S. Kirar
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Management Practices ◽  
Block Design ◽  
Growth And Yield ◽  
Plastic Mulch ◽  
Net Return ◽  
Randomized Block Design ◽  
Black Plastic ◽  
Hand Weeding

A field experiment was conducted during Rabi, 2018-19 at Horticulture farm, RAK College of Agriculture, Sehore (M.P.) to study the effect of different weed management practices on growth and yield of cauliflower. The treatments namely - T1- Weedy check (control), T2- Weed free (through hand weeding) at 30 & 60 DAT, T3 -Pendimethalin 30% EC (PE) + one hand weeding at 30 DAT, T4 Oxyfluorfen 23.5% EC (PE) + one hand weeding at 30 DAT, T5 - Propaquizafop 10% EC (POE) + one hand weeding at 60 DAT, T6 -Wheat straw mulch 5kg/plot, T7- Black plastic mulch (150 mm) were evaluated in randomized block design with three replications. Results indicated that the there was no weed under T7 -black plastic mulch (150 mm) at all the stages. The maximum weed control efficiency (98%) was found with the treatment T7 - black plastic mulch (150 mm) at all the stages i.e. at 30, 60 and 90 DAT. The minimum weed index (0.00, 0.00 and 0.00%) was found with the treatment T7 (Black plastic mulch (150 mm) at all the stages. The maximum curd length, curd width, total curd weight (g) and curd yield (q ha-1) was recorded T7- black plastic mulch (150 mm) with the maximum net return (Rs. 75772.58 per ha).While the lowest net return was found under T1 (Weedy check) (Rs. 21405.34 per ha) treatment. The maximum B: C ratio (1:4.0) was recorded in case of treatment T3 [Pendimethalin 30% EC (PE) + 1HW at 30 DAT].

scholarly journals Nitrogen topdressing and application ways of fluazifop-p-butyl + fomesafen in weed control and agronomic performance of common bean

2015 ◽  
Vol 87 (4) ◽  
pp. 2301-2307 ◽  
Author(s):  
MATHEUS G. SILVA ◽  
ORIVALDO ARF ◽  
PAULO E. TEODORO
Keyword(s):  
Common Bean ◽  
Weed Control ◽  
Yield Components ◽  
Dry Matter ◽  
Block Design ◽  
Agronomic Performance ◽  
Randomized Block Design ◽  
Bean Yield ◽  
Leaf N Content ◽  
Leaf N

ABSTRACT The objective of this study was to investigate the effect of interaction between nitrogen topdressing and different application ways (active ingredients) a.i. fluazifop-p-butyl + fomesafen in weed control and agronomic performance of common bean. The experiment was conducted during winter 2003 in Selvíria/MS. The experimental design used was a randomized block design with four replications in a factorial scheme 2x7. The first factor was composed by the absence or presence of nitrogen topdressing, while the second factor consisted of different application ways of fluazifop-p-butyl + fomesafen. The following variables were measured: leaf N content, dry matter of plants, yield components (number of pods plant-1, number of grains plant-1, the average number of grains pod-1 and mass of 100 grains), grain yield, phytotoxicity and weed control percentage. The nitrogen topdressing with 75 kg ha-1provided higher dry matter of plants, higher weed control and higher common bean yield of irrigated winter. In the absence of nitrogen topdressing in the application of urea before or together to fluazifop-p-butyl + fomesafen increased their effectiveness in controlling weeds without interference in the agronomic performance of common bean.

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