Allelopathy a Tool for Sustainable Weed Management

Phytochemicals released by plant species into the environment inhibit the emergence and growth of surrounding plants by changing their metabolic activity or impacting on their soil community mutualists referred as allelopathy. Allelochemicals are the compounds produced from the secondary metabolism of higher plants and microorganisms such as fungi, bacteria and viruses and affect on many processes in ecosystems and agro-ecosystems. In complex agro-ecosystem both crop and weed shows allelophathic effect. Allelochemicals from crop plant affect on other crop and weed while allelochemicals from weed effect on other weed and crop, beside this both weed and crop also shows autoallelopathy. Hence scientific and proper estimation of allelopathic plant, their allelochemical and susceptible weed species is necessary through advance research. This is helps to increase agricultural production, reduction in cost of pesticides, environment hazard, and way for the sustainable weed management and sustainable development of agricultural production as well as ecological systems.

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Weed Problems in Uruguayan Agriculture: Evolution and Current Situation

Outlooks on Pest Management ◽

10.1564/v32_oct_05 ◽

2021 ◽

Vol 32 (5) ◽

pp. 203-207

Author(s):

M. Alejandro Garcia ◽

Lucia V. Meneses ◽

Tiago Edu Kaspary

Keyword(s):

Weed Management ◽

Agricultural Production ◽

Production Systems ◽

Integrated Weed Management ◽

Zero Tillage ◽

Weed Species ◽

Management Tools ◽

Herbicide Resistant ◽

Species Frequencies ◽

Agricultural Production Systems

Uruguayan agriculture has undergone dramatic changes in the last 50 years driven by the adoption of new agricultural production systems that incorporate zero tillage and herbicide resistant crops. This has resulted in a shift in weed species frequencies and the dispersion of introduced herbicide resistant weed populations. Finally, integrated weed management tools are being developed by research and extension services to manage herbicide-resistant (HR) weeds better and to reduce environmental impact of herbicides.

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Bio-efficacy of post emergence herbicides in boro rice nursery as well as main field and their residual effects on non-target microorganisms

ORYZA- An International Journal on Rice ◽

10.35709/ory.2020.57.3.4 ◽

2020 ◽

Vol 57 (3) ◽

pp. 199-210

Author(s):

Rajib Kundu ◽

Mousumi Mondal ◽

Sourav Garai ◽

Ramyajit Mondal ◽

Ratneswar Poddar

Keyword(s):

Weed Control ◽

Weed Management ◽

Field Experiments ◽

Block Design ◽

Resistance Index ◽

Residual Effects ◽

Cost Ratio ◽

Main Field ◽

Weed Species ◽

Similar Treatment

Field experiments were conducted at research farm of Bidhan Chandra Krishi Viswavidyalaya, Kalyani, West Bengal, India (22°97' N latitude and 88°44' E longitude, 9.75 m above mean sea level) under natural weed infestations in boro season rice (nursery bed as well as main field) during 2017-18 and 2018-19 to evaluate the herbicidal effects on weed floras, yield, non-target soil organisms to optimize the herbicide use for sustainable rice-production. Seven weed control treatments including three doses of bispyribac-sodium 10% SC (150,200, and 250 ml ha-1), two doses of fenoxaprop-p-ethyl 9.3% EC (500 and 625 ml ha-1), one weed free and weedy check were laid out in a randomized complete block design, replicated thrice. Among the tested herbicides, bispyribac-sodium with its highest dose (250 ml ha-1) resulted in maximum weed control efficiency, treatment efficiency index and crop resistance index irrespective of weed species and dates of observation in both nursery as well as main field. Similar treatment also revealed maximum grain yield (5.20 t ha-1), which was 38.38% higher than control, closely followed by Fenoxaprop-p-ethyl (625 ml ha-1) had high efficacy against grasses, sedge and broadleaf weed flora. Maximum net return (Rs. 48765 ha-1) and benefit cost ratio (1.72) were obtained from the treatment which received bispyribac-sodium @ 250 ml ha-1. Based on overall performance, the bispyribac-sodium (250 ml ha-1) may be considered as the best herbicide treatment for weed management in transplanted rice as well as nursery bed.

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For the Sustainable Development of Universities: Exploring the External Factors Impacting Returned Early Career Academic’s Research Performance in China

Sustainability ◽

10.3390/su13031333 ◽

2021 ◽

Vol 13 (3) ◽

pp. 1333

Author(s):

Xiantong Zhao ◽

Hongbiao Yin ◽

Chenyang Fang ◽

Xu Liu

Keyword(s):

Sustainable Development ◽

Mixed Method ◽

Research Performance ◽

Ecological Systems ◽

Early Career ◽

External Factors ◽

The Sustainable Development ◽

Factors Affecting ◽

Mixed Method Design ◽

Good Research

Early career academics are the key agents for the sustainable development of higher education institutions. In China, those who were educated overseas and have returned to Chinese universities to seek academic positions are becoming a fast-growing group. Good research performance is critical to survive in the increasingly competitive environment in academia. Improving research performance requires an understanding of the factors that facilitate or inhibit research performance. In the light of Bronfenbrenner’s ecological systems theory, this study, using a mixed-method design (20 interviewees and 136 respondents), elaborates on a number of external factors affecting returned early career academics’ research performance. Understanding these factors is helpful for the building of a favorable environment that can improve the research performance of the returned early career academics, and hence the sustainable development of universities.

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Weeds Hosting the Soybean Cyst Nematode (Heterodera glycines Ichinohe): Management Implications in Agroecological Systems

Agronomy ◽

10.3390/agronomy11010146 ◽

2021 ◽

Vol 11 (1) ◽

pp. 146

Author(s):

Leonardo F. Rocha ◽

Karla L. Gage ◽

Mirian F. Pimentel ◽

Jason P. Bond ◽

Ahmad M. Fakhoury

Keyword(s):

Weed Management ◽

Soybean Cyst Nematode ◽

Heterodera Glycines ◽

Integrated Management ◽

Cropping System ◽

Cyst Nematode ◽

Weed Species ◽

Initial Inoculum ◽

Herbicide Resistant ◽

Sites Of Action

The soybean cyst nematode (SCN; Heterodera glycines Ichinohe) is a major soybean-yield-limiting soil-borne pathogen, especially in the Midwestern US. Weed management is recommended for SCN integrated management, since some weed species have been reported to be hosts for SCN. The increase in the occurrence of resistance to herbicides complicates weed management and may further direct ecological–evolutionary (eco–evo) feedbacks in plant–pathogen complexes, including interactions between host plants and SCN. In this review, we summarize weed species reported to be hosts of SCN in the US and outline potential weed–SCN management interactions. Plants from 23 families have been reported to host SCN, with Fabaceae including most host species. Out of 116 weeds hosts, 14 species have known herbicide-resistant biotypes to 8 herbicide sites of action. Factors influencing the ability of weeds to host SCN are environmental and edaphic conditions, SCN initial inoculum, weed population levels, and variations in susceptibility of weed biotypes to SCN within a population. The association of SCN on weeds with relatively little fitness cost incurred by the latter may decrease the competitive ability of the crop and increase weed reproduction when SCN is present, feeding back into the probability of selecting for herbicide-resistant weed biotypes. Therefore, proper management of weed hosts of SCN should be a focus of integrated pest management (IPM) strategies to prevent further eco–evo feedbacks in the cropping system.

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Addressing the Differences in Farmers’ Willingness and Behavior Regarding Developing Green Agriculture—A Case Study in Xichuan County, China

Land ◽

10.3390/land10030316 ◽

2021 ◽

Vol 10 (3) ◽

pp. 316

Author(s):

Yingchao Li ◽

Zhiyuan Fan ◽

Guanghui Jiang ◽

Zhuo Quan

Keyword(s):

Sustainable Development ◽

Agricultural Production ◽

Chemical Fertilizer ◽

Service Organization ◽

Chinese Government ◽

Technical Service ◽

Factors Affecting ◽

Land Type ◽

Green Development ◽

Production Behavior

The development of green agriculture is an effective way to realize the sustainable development of agriculture, which is of great significance for guaranteeing national food security, improving the supply ability of agricultural products, promoting the healthy development of cultivated land, and realizing green development. Since the 18th National Congress of the Communist Party of China, China has proposed the establishment of a green-development-oriented agricultural support system, which intends to reverse the worsening of the agricultural ecological environment; however, in 2019, the input of agricultural chemical fertilizer still exceeded the international limit of the safe application of chemical fertilizer. In recent years, agriculture has surpassed industry to become the largest non-point source pollution industry in China, seriously affecting the rural ecological civilization construction and the advancement of green sustainable development coordinated. To analyze the key factors affecting the development of green agriculture, in this study, logistic binary regression analysis was used to measure the main factors affecting farmers’ green agricultural production willingness and green agricultural production behavior. The results show that a farmer’s age, land type, compensation for land transfer, technical service organization, related training, and economic and technological subsidies had significant effects on their green agricultural production willingness. The age of farmers, number of staff, risk of green agricultural production technology, technical service organization, and economic and technological subsidies were shown to have significant effects on the green agricultural production behavior of farmers, where the different factors influenced the behavior to different degrees. Based on the above findings, it is suggested that the Chinese government should help farmers to carry out agricultural green transformation through technical training, policy popularization, economic subsidies, and educational support.

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Impact of cultivars and herbicides on weed management in alfalfa

Canadian Journal of Plant Science ◽

10.4141/p05-210 ◽

2006 ◽

Vol 86 (3) ◽

pp. 875-885 ◽

Cited By ~ 4

Author(s):

J. R. Moyer ◽

S. N. Acharya

Keyword(s):

British Columbia ◽

Weed Control ◽

Weed Management ◽

Forage Quality ◽

Western Canada ◽

Downy Brome ◽

Weed Species ◽

Standard Type ◽

Southern Alberta ◽

Medicago Sativa L

Weeds, especially dandelion (Taraxacum officinale Weber in F.H. Wigg.), tend to infest a forage alfalfa (Medicago sativa L.) stand 2 to 4 yr after establishment. To develop better weed management systems, experiments were conducted at Lethbridge, Alberta, from 1995 to 2002 and Creston, British Columbia, from 1998 to 2001, which included the alfalfa cultivars Beaver (standard type) and AC Blue J (Flemish type) and annual applications of metribuzin and hexazinone. These herbicides are registered for weed control in irrigated alfalfa in Alberta and alfalfa grown for seed. In addition, two sulfonylurea herbicides, metsulfuron and sulfosulfuron, and glyphosate were included. All of the herbicides except glyphosate controlled or suppressed dandelion and mustard family weeds. Metsulfuron at 5 g a.i. ha-1 almost completely controlled dandelion at both locations. However, after metsulfuron application at Lethbridge, dandelion was replaced with an infestation of downy brome, which is unpalatable for cattle. None of the herbicides increased total forage (alfalfa + weed) yield, and in some instances herbicides reduced forage quality by causing a shift from a palatable to an unpalatable weed species. However, it was observed that AC Blue J consistently yielded more than Beaver, and weed biomass was consistently less in the higher-yielding cultivar. AC Blue J was developed primarily for the irrigated area in southern Alberta and for southern British Columbia. Therefore, additional experiments should be conducted to determine which alfalfa cultivars have the greatest ability to compete with weeds in other regions of western Canada. Key words: Alfalfa yield, dandelion, forage quality, weed control

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Strategic Management as a Basis of Sustainable Development in Agricultural Production

Economics and Management ◽

10.35854/1998-1627-2021-7-523-529 ◽

2021 ◽

Vol 27 (7) ◽

pp. 523-529

Author(s):

T. V. Simonyan ◽

N. V. Shvydenko

Keyword(s):

Sustainable Development ◽

Strategic Management ◽

Agricultural Production ◽

Agricultural Sector ◽

Structural Model ◽

Innovation Policy ◽

Cluster Structure ◽

Industrial Complex ◽

The Sustainable Development ◽

Russian Economy

Aim. The presented study aims to substantiate a structural model for developing a sustainable development strategy in agricultural production, making allowance for changes in the level of impact of environmental factors.Tasks. The authors determine the reasons why the Russian agro-industrial complex (AIC) is lagging; identify the specific aspects of forming a strategy for the sustainable development of regional AICs; formulate urgent problems of sustainable development for the agri-food sector of the Russian economy at the federal, regional, and enterprise levels.Methods. This study uses a reasonable and objective approach to the problem of applying strategic management as a foundation for the sustainable development of agricultural production based on the knowledge of the laws of development of socio-ecological and economic systems and a study of multidirectional factors of the external and internal environment. The methodological basis for the sustainable development of agricultural production includes the concept of sustainable development as a priority at the macroeconomic level; strategy as a planning tool based on consistency with programs implemented at the federal, regional and municipal levels of public administration; methods and tools of strategic management at AIC enterprises.Results. The key aspects of the institutional-synergetic approach to the sustainable development of the AIC include the need to coordinate all factors by forming coherent goals not only among economic and financial institutions, but also for technopolises that combine scientific, industrial, financial, and entrepreneurial capital into one system cluster structure. The authors formulate the stages of implementing a strategy for the sustainable development of regional AICs, making it possible to come up with measures aimed at reorganizing the structure of the agricultural sector and to overcome the negative manifestations of crises in the Russian economy, thus minimizing their consequences.Conclusions. During the development of a strategy for the sustainable development of regional AICs, a multiplicative effect arises, making it possible to activate innovation policy and boost the development of other sectors of the economy, improving the population’s quality of life. When developing a strategy at the microeconomic level, it is necessary to make allowance for the specifics of the industry and the mission of a modern agro-industrial enterprise and to focus on solving problems formulated based on the trinity of goals of social, environmental, and economic long-term sustainable development.

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Effect of duration of weed competition and weed control on the yield of Indian spinach

Bangladesh Journal of Agricultural Research ◽

10.3329/bjar.v33i4.2306 ◽

1970 ◽

Vol 33 (4) ◽

pp. 623-629 ◽

Cited By ~ 1

Author(s):

MSA Khan ◽

MA Hossain ◽

M Nurul Islam ◽

SN Mahfuza ◽

MK Uddin

Keyword(s):

Weed Management ◽

Critical Period ◽

Field Experiments ◽

Agricultural Research ◽

Cyperus Rotundus ◽

Weed Competition ◽

Weed Species ◽

Maximum Benefit ◽

Hand Weeding ◽

Crop Weed Competition

Field experiments were conducted at the research farm of Bangladesh Agricultural Research Institute, Joydebpur during kharif-1 (March to July) seasons of 2005 and 2006 to identify the critical period of crop-weed competition for Indian spinach. Major weed species were Paspalurn commersoni, Echinochlaa crusgalli. Lie nv/nc india. Cyanotis axillaris and Cyperus rotundus. The lowest weed dry matter was 76.3 g m-2 in 2005 and l01.60 g m-2 in 2006 from the plots weeded up to 40 days after transplanting (DAT). The highest yields were obtained (74.82 t ha in 2005 and 48.48 t ha in 2006) from the weed free plots. The fresh yield of Indian spinach did not vary among no weeding upto 20, 30 and 40 DAT in 2006. But weeded plot upto 30 and 40 DAT produced identical yield in 2005. Maximum BCR (4.52) was obtained from weeded plots upto 30 DAT in 2005 but BCR (2.60) was same from weeded upto 30 and 40 DA F in 2006. On an average, highest BCR (3.55) was recorded from weeding upto 30 DAT. Results revealed that the critical period of crop weed competition lies between 20 and 30 DAT and two times hand weeding would be necessary within 30 DAT for maximum benefit. Key Words: Crop-weed competitions, critical period, weed management and Indian spinach. doi: 10.3329/bjar.v33i4.2306 Bangladesh J. Agril. Res. 33(4) : 623-629, December 2008

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Trends and Policy Correlates of Agricultural Production and Agricultural Production Sustainability Outcomes in Ghana and Nigeria

Journal of Sustainable Development ◽

10.5539/jsd.v8n9p71 ◽

2015 ◽

Vol 8 (9) ◽

pp. 71

Author(s):

Olawale Emmanuel Olayide ◽

Isaac Kow Tetteh ◽

Labode Popoola

Keyword(s):

Sustainable Development ◽

International Development ◽

Agricultural Production ◽

Agricultural Development ◽

Agricultural Sector ◽

Agricultural System ◽

Political Systems ◽

Development Agenda ◽

Development Outcomes ◽

Development Agendas

This paper analysed policy correlates of agricultural production and agricultural production sustainability outcomes in Ghana and Nigeria. It underscores the influence of political systems and international development agendas as correlates of agricultural production and agricultural production sustainability outcomes. This is to the extent of providing evidence policy on agricultural production and agricultural production sustainability outcomes. Ghana and Nigeria have comparable farming/agricultural system and policy environment. Data used for the analyses spanned five decades. Trends analysis and inferential statistics were employed. The results revealed that policy correlates can contribute to the current discourse in sustainable development agenda and to resolving the dilemma of agricultural policy implementation for sustainable agricultural development, especially in Ghana and Nigeria. The findings reinforce the need for appropriate policies in transforming the agricultural sector while ensuring sustainable development outcomes.

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Interactions of Nitrogen Source and Rate and Weed Removal Timing Relative to Nitrogen Content in Corn and Weeds and Corn Grain Yield

International Scholarly Research Notices ◽

10.1155/2017/8961367 ◽

2017 ◽

Vol 2017 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Alexandra M. Knight ◽

Wesley J. Everman ◽

David L. Jordan ◽

Ronnie W. Heiniger ◽

T. Jot Smyth

Keyword(s):

Grain Yield ◽

Weed Management ◽

Management Strategies ◽

Field Studies ◽

Weed Species ◽

Weed Interference ◽

Coated Urea ◽

N Fertility ◽

Corn Grain ◽

Corn Grain Yield

Adequate fertility combined with effective weed management is important in maximizing corn (Zea mays L.) grain yield. Corn uptake of nitrogen (N) is dependent upon many factors including weed species and density and the rate and formulation of applied N fertilizer. Understanding interactions among corn, applied N, and weeds is important in developing management strategies. Field studies were conducted in North Carolina to compare corn and weed responses to urea ammonium nitrate (UAN), sulfur-coated urea (SCU), and composted poultry litter (CPL) when a mixture of Palmer amaranth (Amaranthus palmeri S. Wats.) and large crabgrass (Digitaria sanguinalis L.) was removed with herbicides at heights of 8 or 16 cm. These respective removal timings corresponded with 22 and 28 days after corn planting or V2 and V3 stages of growth, respectively. Differences in N content in above-ground biomass of corn were noted early in the season due to weed interference but did not translate into differences in corn grain yield. Interactions of N source and N rate were noted for corn grain yield but these factors did not interact with timing of weed control. These results underscore that timely implementation of control tactics regardless of N fertility management is important to protect corn grain yield.

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