Weed indices

A field experiment was conducted during kharif seasons of 2013 and 2014 at Livestock Farm, JNKVV, Jabalpur (M.P.). Eight treatments comprising of four doses of propaquizafop + imazethapyr mixture (47+66, 50+70, 53+74 and 56+78 g/ha), alone application of propaquizafop (75 g/ha) and imazethapyr (100 g/ha), hand weeding twice (20 and 40 DAS) including weedy check were laidout in randomized block design with three replications.

7p angicungduoc8 07-11-2020 10 2   Download

Review study showed that CTPTR-CTW and ZTDSR-ZTW (RRRW) record the highest seed bank (SB) of grasses, sedges and BLWs as total weeds, in general; and predominant weeds i.e., Echinochloa spp., Ammania baccifera, Commelina benghalensis and Digitaria sanguinalis, in particular. It also showed the higher species richness (DMg) and Shannon–Weaver (H’) indices. CTDSRCTW and CTDSR-ZTW (RRR) show the lowest WSB and at par with Shannon–Weaver (H’) index; further, lowest species richness (DMg) under CTDSR-CTW.

15p caygaocaolon7 18-09-2020 11 2   Download

A field experiment was conducted during kharif 2014 and 2015 at Research Farm of Sher-e-Kashmir University of Agricultural Sciences and Technology, Jammu to study the impact of different weed management practices on weed dynamics, yield attributes, yield and relative economics of direct seeded basmati rice preceded by the weed management interventions applied in the previous crop of wheat.

13p caygaocaolon7 18-09-2020 15 1   Download

Field evaluation of different machineries was carried at Central Coffee Research Institute (CCRI) and Coffee Research Sub Station (CRSS), Chettalli during the year 2012-16. Results of field evaluation on different spaying system indicated that significantly higher field efficiency was observed with Multi Utility Track Vehicle spraying with 4 spray lance (0.557 ha per hour) and it was on par with Centralized Spraying System with 14 spray lance (0.510 ha per hour). Lower field efficiency was observed with power tiller spray system (0.410 ha per hour) with 8 lance.

8p nguaconbaynhay6 24-06-2020 7 0   Download

An experiment was conducted during rabi 2010-11 to study the influence of integrated weed management on β-carotene content and Vit-C content of carrot. The results indicated that the influence of integrated weed management on these quality parameters was found to be non-significant. However, maximum β-carotene content (8291.205 µg) and Vit-C content (6.30mg per 100 gms) were recorded with treatment Metribuzin 0.3 kg a.i ha-1 (PE) + Hand Weeding 30 DAS and the minimum were recorded in unweeded control.

4p nguaconbaynhay6 23-06-2020 13 1   Download

Although plants exhibit a wide range of dyes, not all of these pigments can exhibit as dyes. Jangali Pyaz commonly known as vanpyaz (Asphodellus tenufolium) is a weed plant which is shredded off as a waste was exploited as a source of natural dye for Tassar Silk with objective of standardizing conditions of extraction and dyeing, fastness properties, ecofriendliness and colour absorption. The optimum dyeing conditions were 4g concentration, 60 minutes extraction time and 75 minutes of dyeing time.

12p gaocaolon5 14-06-2020 6 1   Download

The field experiment was conducted during Kharif, 2017 at Instructional farm of Rajasthan College of Agriculture, Udaipur. Experimental field was mostly dominated by grassy weeds namely; Echinochloa colona, Cynodon dactylon, Digitaria sanguinallis with broad leaf weeds; Commelina benghalensis, Digera arvensis, Trianthim aportulcastrum, Amarathus viridis and Parthenium hysterophorus and sedges; Cyperus rotundus. The results indicated that all the herbicidal treatments were significantly superior over weedy check with all parameters.

5p cothumenhmong5 17-05-2020 14 1   Download

A field experiment was conducted to assess the effect of seeding methods and weed management practices on yield of aerobic rice and nutrient removal by the weeds under direct seeded aerobic rice. Among the seeding methods line sowing increased the grain yield than the broadcasting method. Among weed management all the weed management practices were found to be equally effective in reducing the uptake of nutrient by weeds and producing higher grain yield as compare to weedy check. However maximum yield was obtained with the application of Pretilachlor 0.

8p nguaconbaynhay5 16-05-2020 13 0   Download

Study was conducted to assess the phytosociological studies in opium poppy at Mandsaur district of Madhya Pradesh state of India during 2016- 17. A total ten weed species were found and identified. The results obtained indicated that Chenopodium album was most densely populated. The most important weeds that were associated with the opium poppy crop in the study area are of broad-leaved weeds.

5p kethamoi4 16-04-2020 7 0   Download

A field experiment was carried out during kharif 2009-2010 at instructional farm, Junagadh Agricultural University, Junagadh to evaluate the suitable integrated weed management (IWM) practices for soybean. Result indicated that main weed flora was Cyperus rotundus L. integration of and its weed infestation was maximum from sowing to the harvesting of soybean. Integration of herbicides like Pendimethalin @ 0.750 kg ha-1 preemergence + 1HW and IC at 20 DAS recorded significant reducing in weed dry matter and higher weed control efficiency resulting in higher yield.

6p trinhthamhodang4 22-03-2020 18 0   Download

Testing techniques to reduce weed infestation is a crucial step in developing direct tree seedling systems. The use of pre-emergence herbicides may be an alternative to manual weeding techniques, but so far, information on how they affect native tree species based nurseries is scarce. We established an experiment to know the major weed flora and evaluated the effect of pre and post emergent herbicide on weed suppression of secondary nursery of Tectona grandis and Pterocarpus santalinus.

10p caygaocaolon3 09-03-2020 10 1   Download

Rice is the staple food of Odisha in terms of area, production and yield. System of Rice Intensification (SRI) involves adoption of changes in management practices of rice cultivation creating a favourable condition for crop growth with less utilization of inputs. Despite the benefits, SRI has not adopted by the farmers as expected in the state. This paper attempted to analyse the perception of Odisha farmers regarding major constraints hindering widespread of SRI by different categories of farmers (i.e. adopters, dropouts and non-adopters) in the state and the positive impact of SRI.

9p trinhthamhodang3 22-02-2020 13 1   Download

Sugarcane is the most significant cash crop. In all over the countries the India ranks first both in respect of area and total production among the sugarcane growing. Even if, there is remarkable opportunity for further progress in relation to increase the sugarcane production by way of adoption of modern technology in sugarcane cultivation. The adoption of improved technology of sugarcane by the farmers is not uniform due to several reasons.

6p chauchaungayxua3 07-02-2020 18 1   Download

The Present study was carried out at Bharatpur district of Eastern Rajasthan during 2015- 16, 2016-17 and 2017-18. Potato is one of the most important vegetable crops of the country. The development of the Agriculture is primarily depends on the application of the scientific technologies by making the best use of available resources. One of the major constraints of traditional potato farming is low productivity due to non management of weeds. To increase the production, productivity and quality of agricultural produce, on farm testing are being conducted at various farmers’ field.

7p nguathienthan2 26-12-2019 15 0   Download

Myrothecium roridum, a fungal plant pathogen is known to infect the leaves and stem of coffee seedlings in the nursery and leaves and berries of the plants in the field. The pathogen has a very wide host base infecting many agricultural and horticulture crops, ornamentals, gymnosperms and weeds. As black pepper is a major intercrop grown in the coffee plantations, the present study was under taken to test the ability of M. roridum to infect black pepper (Piper nigrum L.). Two isolates of M. roridum, isolated both from coffee nursery and field was inoculated on the leaves of pepper vines.

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Generally farmers prefer manual weeding due to the lack of awareness about the mechanical weeder. But manual weeding is a most laborious and time consuming process. Nowadays mechanical weeders are being promoted to reduce drudgery, time of operation and to overcome the lack of labours problem. The study has been conducted on sandy loam and clay loam soils to evaluate the performance of two mechanical power weeders i.e., Garuda power weeder and Japanese power weeder. From the results, Garuda weeder has the highest weeding efficiency of 68.62 and 76.92 % and lowest plant damage of 24 and 13.

7p quenchua2 15-12-2019 7 1   Download

A field experiment was conducted to study the effect of herbicides on weed control and soil microbial activity. The experiment consisted of 12 treatments laid out RCBD. The treatments consisted of herbicides viz., atrazine, 2,4-D, tembotrione, topramezone and their tank mixtures sprayed at 16 DAS as early post emergent herbicides, they were checked against recommended weed management practice- atrazine 1.25 kg ha -1 (PRE) + 1HW + 1IC, sequential application-atrazine (PRE) fb 2,4-D,Weed free and weedy check. The results indicated that significantly lower weed density (7.67 per 0.

9p kequaidan2 11-12-2019 19 1   Download

The current water shortage in Egypt is 13.5 Billion cubic meter per year (BCM/yr) and is expected to continuously increase. Currently, this water shortage is compensated by drainage reuse which consequently deteriorates the water quality. Therefore, this research was commenced with the objective of assessing different scenarios for 2025 using the Water Evaluation and Planning (WEAP) model and by implementing different water sufficiency measures. Field data were assembled and analyzed, and different planning alternatives were proposed and tested in order to design three future scenarios.

10p kequaidan1 16-11-2019 30 1   Download

Accumulation of chromium (Cr) was determined in water, sediment, aquatic plants, invertebrates and fish in aquatic ecosystems receiving effluents from handloom textile industries in Ranaghat–Fulia region of West Bengal in India. Cr was determined in the samples by atomic absorption spectrophotometer and data were analyzed functionally by Genetic Algorithm to determine trend of depositions of Cr in the sediment and water. Area plot curve was used to represent accumulation of Cr in biota.

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A biomimetic method of gold nanoparticles synthesis utilizing the highly invasive aquatic weed pistia (Pistia stratiotes) is presented. In an attempt to utilize the entire plant, the efficacy of the extracts of all its parts – aerial and submerged – was explored with different proportions of gold (III) solution in generating gold nanoparticles (GNPs). The progress of the synthesis, which occurred at ambient temperature and pressure and commenced soon after mixing the pistia extracts and gold (III) solutions, was tracked using UV–visible spectrophotometry.

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