Fungal Phytotoxins in Sustainable Weed Management

2018 ◽  
Vol 25 (2) ◽  
pp. 268-286 ◽  
Author(s):  
Maurizio Vurro ◽  
Angela Boari ◽  
Francesca Casella ◽  
Maria Chiara Zonno
Keyword(s):  
Weed Management ◽  
Pathogenic Fungi ◽  
Mechanisms Of Action ◽  
Limiting Factors ◽  
Integrated Weed Management ◽  
Plant Pathogenic Fungi ◽  
Design Strategies ◽  
Disease Etiology ◽  
Chemical Structures ◽  
Toxic Metabolites

Fungal phytotoxins are natural secondary metabolites produced by plant pathogenic fungi during host–pathogen interactions. They have received considerable particular attention for elucidating disease etiology, and consequently to design strategies for disease control. Due to wide differences in their chemical structures, these toxic metabolites have different ecological and environmental roles and mechanisms of action. This review aims at summarizing the studies on the possible use of these metabolites as tools in biological and integrated weed management, e.g. as: novel and environmentally friendly herbicides; lead for novel compounds; sources of novel mechanisms of action. Moreover, the limiting factors for utilizing those metabolites in practice will also be briefly discussed.

scholarly journals Fungal metabolites as a natural source of herbicide: a novel approach of weed management

2019 ◽  
Vol 11 (1) ◽  
pp. 158-163 ◽  
Author(s):  
Ajay Kumar Singh ◽  
Akhilesh Kumar Pandey
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Low Cost ◽  
Pathogenic Fungi ◽  
Biological Weed Control ◽  
Design Strategies ◽  
Human Welfare ◽  
Disease Etiology ◽  
Chemical Structures ◽  
Novel Approach

Weeds are undesirable vegetation directly or indirectly inferring with human welfare. Conventional methods of weed control have failed due to one or other reason. Herbicide-resistant weeds are the main problem in weed control due to the number of weed biotypes resistant to herbicides that constantly increases by the continuous use of the same products for years. Development of alternative weed control methods is needed to help decrease reliance on herbicide use. Biological weed control is an alternative option for weed problems, particularly in agriculture and forestry. It is based on the use of natural enemies, particularly insects and pathogens to control weeds, as a sustainable, low cost and more environmentally acceptable method of weed control. One of the approaches to biological weed control using fungal phytotoxin applied in similar ways to conventional herbicides. Fungal phytotoxins are natural secondary metabolites produced by plant pathogenic fungi during host–pathogen interactions. They have received considerable particular attention for elucidating disease etiology, and consequently to design strategies for disease control. Due to wide differences in their chemical structures, these toxic metabolites have different ecological and environmental roles and mechanisms of action. This review aims at summarizing the studies on the possible use of fungal phytotoxin as a lucrative, novel source of secondary phytotoxic herbicidal compounds for management of broad spectrum, noxious and pernicious weeds.

Integrated Weed Management in Oilseed Brassica

2016 ◽  
Vol 30 (4) ◽  
pp. 22
Author(s):  
Abhinandan Singh ◽  
Pankaj Kumar Ojha
Keyword(s):  
Weed Management ◽  
Integrated Weed Management

First record of Pestalotiopsis spp. from affected leaves of mastic shrubs (Pestacia lentiscus L.) in northeastern of Libya.

2016 ◽  
Vol 5 (08) ◽  
pp. 4744
Author(s):  
Zahra Ibrahim El-Gali
Keyword(s):  
Signs And Symptoms ◽  
Pathogenic Fungi ◽  
First Record ◽  
Plant Pathogenic Fungi ◽  
Pistacia Lentiscus ◽  
Plant Materials ◽  
Al Jabal Al Akhdar ◽  
First Time

This study was carried out to identify the unknown different symptoms and their causes as plant pathogenic fungi from Al-Jabal Al-Akhdar District. Plant materials with fungal signs and symptoms were collected and examined. The main fungi consistently isolated from symptomatic leaves and twigs were Pestalotiopsis spp. Morphology, colony characteristics, and pathogenicity of the isolates were examined. My report the occurrence of Pestalotiopsis spp. on leaves of mastic (Pistacia lentiscus) for the first time in Libya.

scholarly journals Growth and Phenology of Vulpia Myuros in Comparison with Apera Spica-Venti, Alopecurus Myosuroides and Lolium Multiflorum in Monoculture and in Winter Wheat

Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1495
Author(s):  
Muhammad Javaid Akhter ◽  
Bo Melander ◽  
Solvejg Kopp Mathiassen ◽  
Rodrigo Labouriau ◽  
Svend Vendelbo Nielsen ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Weed Management ◽  
Lolium Multiflorum ◽  
Management Strategies ◽  
Integrated Weed Management ◽  
Growth Stages ◽  
Neighborhood Design ◽  
Alopecurus Myosuroides ◽  
Winter Cereals ◽  
Arable Weed

Vulpia myuros has become an increasing weed problem in winter cereals in Northern Europe. However, the information about V. myuros and its behavior as an arable weed is limited. Field and greenhouse experiments were conducted in 2017/18 and 2018/19, at the Department of Agroecology in Flakkebjerg, Denmark to investigate the emergence, phenological development and growth characteristics of V. myuros in monoculture and in mixture with winter wheat, in comparison to Apera spica-venti, Alopecurus myosuroides and Lolium multiflorum. V. myuros emerged earlier than A. myosuroides and A. spica-venti but later than L. multiflorum. Significant differences in phenological development were recorded among the species. Overall phenology of V. myuros was more similar to that of L. multiflorum than to A. myosuroides and A. spica-venti. V. myuros started seed shedding earlier than A. spica-venti and L. multiflorum but later than A. myosuroides. V. myuros was more sensitive to winter wheat competition in terms of biomass production and fecundity than the other species. Using a target-neighborhood design, responses of V. myuros and A. spica-venti to the increasing density of winter wheat were quantified. At early growth stages “BBCH 26–29”, V. myuros was suppressed less than A. spica-venti by winter wheat, while opposite responses were seen at later growth stages “BBCH 39–47” and “BBCH 81–90”. No significant differences in fecundity characteristics were observed between the two species in response to increasing winter wheat density. The information on the behavior of V. myuros gathered by the current study can support the development of effective integrated weed management strategies for V. myuros.

scholarly journals Effect of Barley Sowing Density on the Integrated Weed Management of Lolium rigidum (Annual Ryegrass) in Mediterranean Dryland: A Modeling Approach

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1565
Author(s):  
María Belén D’Amico ◽  
Guillermo R. Chantre ◽  
Guillermo L. Calandrini ◽  
José L. González-Andújar
Keyword(s):  
Weed Management ◽  
Life Cycles ◽  
Integrated Weed Management ◽  
Future Research ◽  
Seed Removal ◽  
Weed Infestation ◽  
High Control ◽  
Weed Dynamics ◽  
The Impact

Population models are particularly helpful for understanding long-term changes in the weed dynamics associated with integrated weed management (IWM) strategies. IWM practices for controlling L. rigidum are of high importance, mainly due to its widespread resistance that precludes chemical control as a single management method. The objective of this contribution is to simulate different IWM scenarios with special emphasis on the impact of different levels of barley sowing densities on L. rigidum control. To this effect, a weed–crop population model for both L. rigidum and barley life cycles was developed. Our results point out: (i) the necessity of achieving high control efficiencies (>99%), (ii) that the increase of twice the standard sowing density of barley resulted in a reduction of 23.7% of the weed density, (iii) non-herbicide-based individual methods, such as delayed sowing and weed seed removal at harvest, proved to be inefficient for reducing drastically weed population, (iv) the implementation of at least three control tactics (seed removal, delay sowing and herbicides) is required for weed infestation eradication independently of the sowing rate, and (v) the effect of an increase in the sowing density is diluted as a more demanding weed control is reached. Future research should aim to disentangle the effect of different weed resistance levels on L. rigidum population dynamics and the required efficiencies for more sustainable IWM programs.

scholarly journals Functional analysis of the conserved transcriptional regulator CfWor1 inCladosporium fulvumreveals diverse roles in the virulence of plant pathogenic fungi

2014 ◽  
Vol 92 (1) ◽  
pp. 10-27 ◽  
Author(s):  
Bilal Ökmen ◽  
Jérôme Collemare ◽  
Scott Griffiths ◽  
Ate van der Burgt ◽  
Russell Cox ◽  
...  
Keyword(s):  
Functional Analysis ◽  
Transcriptional Regulator ◽  
Pathogenic Fungi ◽  
Plant Pathogenic Fungi
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