Weed management in sesame with sequential application of herbicides

Verma

et al. 2023

IJPSS

An experiment had been conducted at the Agronomy Farm, Indira Gandhi Krishi Vishwavidyalaya, Raipur, (C.G.) in the kharif season of 2019, to determine the effects of integrated weed management practices on microbial population in soil, yield and economics in wet direct seeded rice. Pre-emergence herbicides (Oxadiargyl and Pretilachlor) were followed by post-emergence herbicide (Bispyribac-Na), mechanical and manual weeding. Plots treated with oxadiargyl performed better than pretilachlor. When Oxadiargyl was integrated with Hand Weeding (HW) at 35 days after sowing (DAS) gave results which were better than twice HW plot (T10). Oxadiargyl @ 70g/ha at 7-11 DAS fb HW at 30-35 DAS (T4) proved to be superior over all the treatments when yield and economics of wet direct seeded rice was concerned and was statistically at par with twice HW plot (T10) and oxadiargyl @ 70 g/ha at 7-11 DAS fb bispyribac-Na @ 25 g/ha at 30-35 DAS (T2). The unsprayed and two-hand weeding treatments had much lower levels of fungi, actinobacteria, and bacteria than the other weed control methods. The herbicidal treatments had much higher microbial populations at all stages of observation.

Section: Economics Of Dsrsupporting

confidence: 91%

Effect of Integrated Weed Management Practices on Microbial Population in Soil, Yield and Economics in Wet Direct Seeded Rice

Verma

et al. 2023

IJPSS

“…Additional growth in the number of branches may be attributable to the sole or combined application of pendimethalin and butachlor, which kept broad spectrum weeds present from the start of crop growth and effectively used growth resources to produce more branches. The outcomes were consistent with [7].…”

Section: Number Of Branches/plantsupporting

confidence: 66%

Productivity of Sesame on Growth and Yield as Influence by Plant Spacing and Weed Management Practices

Roy,

2023

IJECC

Field experiment was conducted during zaid-2022 at the Crop Research Farm, Department of Agronomy, Naini Agricultural Institute, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj (U.P.) India, to investigate on the productivity of sesame on growth and yield as influence by plant spacing and weed management practices. The soil of experimental plot was sandy loamy in texture, nearly neutral in soil reaction (pH 7.8), low in organic carbon (0.35%). The treatments consist of three levels of spacing 20 x 10cm, 30 x 10 cm, and 40 x 10 cm and three types of weed managements (Two hand weeding at 21 and 42DAS, Pendimethalin 0.7 5kg/ha at 1 DAS + one hand weeding at 21 DAS, and + Quizalofop ethyl 0.05 kg/ha on 25 DAS + one hand weeding at 42 DAS).The experiment was laidout in randomized complete block design with nine treatments each replicated three times. The results obtained indicated that the higher plant height (129.99 cm), higher number of branches (3.77), higher plant dry weight (15.63 g/plant), higher crop growth rate (12.13 g/m2/day) higher number of capsules/plant (31.91), higher number of seeds/ capsules (47.48), higher test weight (3.48 gm), higher seed yield (1177.07 kg/ha) and higher stalk yield (1610.41 kg/ha) were significantly influenced at a plant spacing of 40 x 10 cm along with the application of Quizalofop ethyl @0.05 kg/ha on 25 DAS + one hand weeding at 42 DAS. However higher gross return (92,164.84 INR/ha), higher net return (65,840.84 INR/ha) and higher B:Cratio (2.50) were also recorded in treatment-9 at a spacing of 40 x 10 cm along with the application of Quizalofop ethyl @0.05 kg/ha on 25 DAS + one hand weeding at 42 DAS.

“…"The lower grain yield under weedy may be due to the high weed interference and less yield attributing parameters. Weedy plot competes with rice plants for light, nutrients, moisture and space resulting reduction in grain yield" [23,24].…”

Section: Yield Attributes and Yieldmentioning

confidence: 99%

Weed Control by New Generation Herbicide and Its Influence on Yield and Nutrient Uptake in Transplanted Rice

Patel,

Chattopdhayaya,

Dubey

et al. 2023

IJPSS

A field experiment was conducted during kharif season 2019 and 2020 at research farm of Bihar Agricultural University, Sabour, Bhagalpur to evaluate the effect of different herbicide on weed attributes, yield attributes, yield and nutrient uptake in transplanted rice. The experiment comprised six treatment T1 (pyrazosulfuron ethyl 10 % WP 15 g a.i. ha-1), T2 (pyrazosulfuron ethyl 10 % WP 30 g a.i. ha-1), T3 (carfentrazone ethyl 25 g a.i. ha-1), T4 (carfentrazone ethyl 50 g a.i. ha-1), T5 (weed free) and T6 (weedy) with four replications in randomized block design. The significantly lesser weed density (37.75 No.m-2), weed dry weight (22.87 gm-2), weed index (3.41) and higher weed control efficiency (80.58 %) were recorded with the application of pyrazosulfuron ethyl 30 g a.i. ha-1 at 30 DAT than other treatments. Crop growth parameters (plant height, number of effective tillers, dry matter accumulation), yield attributes (panicle length, effective tillers, number of grains, test weight), nutrient uptake and grain yield were recorded highest in weed free plot (57.88 q ha-1) followed by pyrazosulfuron ethyl 10 % WP 30 g a.i. ha-1. However, least grain yield was recorded under weedy plot. The results suggested that pyrazosalfuron ethyl 10 % WP 30 g a.i. ha-1 were best broad spectrum effective herbicide in order to minimize the diverse weed flora in transplanted rice.