Improvement and application of the biocontrol fungus Stagonospora convolvuli LA39 formulation for efficient control of Calystegia sepium and Convolvulus arvensis

Boss, Désirée; Schläpfer, E.; Fuchs, Jacques; Défago, Geneviève; Maurhofer, M.

doi:10.1007/bf03356223

Cited by 7 publications

(6 citation statements)

References 18 publications

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“…The experience was successfully repeated several years in succession. However, the same level of control was not achieved from one year to the next (Boss et al 2007). This efficacy was further enhanced by the combined use of the fungal inoculum and the insect Melanagromyza albocilia, the latter facilitating the penetration of the fungus into the weed stem (Défago et al 2001).…”

Section: Evidence Of Weed Biological Control By Fungimentioning

confidence: 99%

Biodiversity-based options for arable weed management. A review

Petit

Cordeau

Chauvel

et al. 2018

Agron. Sustain. Dev.

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In the context of a shift towards pesticide reduction in arable farming, weed management remains a challenging issue. Integrated Weed Management currently recommends agronomic practices for weed control, but it does not integrate the use of biodiversitybased options, enhancing the biological regulation of weeds. Here, wereview existing knowledge related to three potentially beneficial interactions, of crop-weed competition, weed seed granivory, and weed interactions with pathogenic fungi. Our main finding are the following : (1) promoting cropped plant-weed competition by manipulating cropped cover could greatly contribute to weed reduction ; (2) weed seed granivory by invertebrates can significantly lower weed emergence, although this effect can be highly variable because seed predation is embedded within complex multitrophic interactions that are to date not fully understood ; (3) a wide range of fungi are pathogenic to various stages of weed development, but strain efficacy in field trials does not often match that in controlled conditions. We present a framework that superimposes biodiversity-based options for weed biocontrol on a classical Integrated Weed Management system. We then describe the current state of knowledge on interactions between agronomic practices and the organisms at play and between the different biological components of the system. We argue that further advances in our understanding of biodiversity-based options and their performance for weed biocontrol will require farm-scale experimental trials.

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Section: Evidence Of Weed Biological Control By Fungimentioning

confidence: 99%

Biodiversity-based options for arable weed management. A review

Petit

Cordeau

Chauvel

et al. 2018

Agron. Sustain. Dev.

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“…Invasive plant control and eradication measures (Hulme 2006) have relied on the use of a variety of methods and their combination (manual and mechanical removal, chemical control with herbicide use or biological controls; e.g., Atkins and Williamson 2008; Beerling 1990; Boss et al 2007; Derr 2008). These operations are time-consuming and expensive and usually have (1) time-limited effect on targeted invasive plant species and (2) a potential impact on non-targeted native species and other ecosystem components (Kettenring and Reinhardt Adams 2011).…”

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confidence: 99%

Using Microwave Soil Heating to Inhibit Invasive Species Seed Germination

Wilde

Buisson

Yavercovski

et al. 2017

Invasive plant sci. manag.

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Successful invasive plant eradication is rare, because the methods used target the adult stage, not taking into account the development capacity of a large seedbank. Heating by microwave was considered, because it offers a means to quickly reach the temperature required for loss of seed viability and inhibition of germination. Previous results were not encouraging, because homogeneous and deep-wave penetration was not achieved, and the various parameters that can affect treatment effectiveness were incompletely addressed. This study aimed to determine, under experimental conditions, the best microwave treatment to inhibit invasive species seed germination in terms of power (2, 4, 6 kW) and duration (2, 4, 8 min) of treatments and depending on soil moisture (10%, 13%, 20%, 30%) and seed burial depth (2, 12 cm). Three invasive species were tested: Bohemian knotweed, giant goldenrod, and jimsonweed. The most effective treatments required relatively high power and duration (2kW8min, 4kW4min, 6kW2min, and 6kW4min; 4kW8min and 6kW8min were not tested for technical reasons), and their effectiveness diminished with increasing soil moisture with germination percentage between 0% and 2% for the lowest soil moisture, 0% and 56% for intermediate soil moisture, and 27% and 68% in control treatments. For the highest soil moisture, only 2kW8min and 4kW4min reduced germination percentage between 2% and 19%. Occasionally, germination of seeds located at the 12-cm depth was more strongly affected. Giant goldenrod seeds were the most sensitive, probably due to their small size. Results are promising and justify further experiments before developing a field microwave device to treat large volumes of soil infested by invasive seed efficiently and with reasonable energy requirements. Other types of soil, in terms of texture and organic matter content, should be tested in future experiments, because these factors influence soil water content and, consequently, microwave heating.

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“…Other entomopathogenic fungi, including Beauveria (Cordycipitaceae; Mascarin and Jaronski, 2016 ), Parametarhizium (Clavicipitaceae; Gao et al., 2021 ) and Clonostachys (Bionectriaceae; Vega et al., 2008 ) have been used successfully to control insect pests. The fungal pathogen, Stagonospora convolvuli , produces metabolites that are toxic to crop pathogens ( Boss et al., 2007a ) and weeds ( Boss et al., 2007b ). There is evidence that endophyte-containing pasture grasses are more competitive against invading weeds ( Saikkonen et al., 2013 ).…”

Section: Discussionmentioning

confidence: 99%

The diversity of microfungi associated with grasses in the Sporobolus indicus complex in Queensland, Australia

Steinrucken

Vitelli

Holdom

et al. 2022

Front. Fungal Biol.

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There are five closely related Sporobolus species, collectively known as weedy Sporobolus grasses (WSG) or the rat’s tail grasses. They are fast growing, highly competitive, unpalatable weeds of pastures, roadsides and woodlands. An effective biological control agent would be a welcomed alternative to successive herbicide application and manual removal methods. This study describes the initial exploratory phase of isolating and identifying native Australian microfungi associated with WSG, prior to evaluating their efficacy as inundative biological control agents. Accurate species-level identification of plant-pathogenic microfungi associated with WSG is an essential first step in the evaluation and prioritisation of pathogenicity bioassays. Starting with more than 79 unique fungal morphotypes isolated from diseased Sporobolus grasses in Queensland, Australia, we employed multi-locus phylogenetic analyses to classify these isolates into 54 fungal taxa. These taxa belong to 22 Ascomycete families (12 orders), of which the majority fall within the Pleosporales (>24 taxa in 7 families). In the next phase of the study, the putative species identities of these taxa will allow us to prioritise those which are likely to be pathogenic based on existing literature and their known ecological roles. This study represents the first step in a systematic, high-throughput approach to finding potential plant pathogenic biological control agents.

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Improvement and application of the biocontrol fungus Stagonospora convolvuli LA39 formulation for efficient control of Calystegia sepium and Convolvulus arvensis

Cited by 7 publications

References 18 publications

Biodiversity-based options for arable weed management. A review

Biodiversity-based options for arable weed management. A review

Using Microwave Soil Heating to Inhibit Invasive Species Seed Germination

The diversity of microfungi associated with grasses in the Sporobolus indicus complex in Queensland, Australia

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