Seeds of weeds as an alternative host of phytopathogens

Oliveira, Emerson Flores de; Santos, Patrícia Resplandes Rocha dos; Santos, Gil Rodrigues dos

doi:10.1590/1808-1657000972017

Cited by 5 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This weed can also act as a host of pests and diseases, causing significant losses of yield in agricultural crops (Kissmann and Groth 1999; Oliveira et al . 2018). In S. oleraceus , diseases that are common in lettuce, such as downy mildew ( Bremia lactucae ), are commonly observed, as both plants belong to the Asteraceae family (Vardhana 2017; Mendes and Urben 2020).…”

Section: Resultsmentioning

confidence: 99%

“…Bidens pilosa is found in practically all regions of Brazil during all seasons of the year, and is a very aggressive invasive weed competing with crops for many resources. This weed can also act as a host of pests and diseases, causing significant losses of yield in agricultural crops (Kissmann and Groth 1999;Oliveira et al 2018). In S. oleraceus, diseases that are common in lettuce, such as downy mildew (Bremia lactucae), are commonly observed, as both plants belong to the Asteraceae family (Vardhana 2017;Mendes and Urben 2020).…”

Section: Occurrence and Pathogenicity Tests In The Weedsmentioning

confidence: 99%

See 1 more Smart Citation

Pythium and Phytopythium species associated with weeds collected in vegetable production fields in Brazil

Barboza

Cabral

Rossato

et al. 2022

Letters in Applied Microbiology

View full text Add to dashboard Cite

Significance and Impact of the Study: The presence of weeds in cultivated areas is a limitation on vegetable production in Brazil. Beyond their competition for water, nutrients and light, weeds may be alternative hosts of plant pathogens, favouring their survival and potential increase in population. In this work, six Pythium and two Phytopythium species were identified infecting weeds collected from vegetable fields in Brazil. Most of these Pythium and Phytopythium species identified are polyphagous plant pathogens, attacking many plant species including many vegetables. This finding has ecological and epidemiological significance indicating weeds can be reservoirs and inoculum sources of pathogens for vegetable crops.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Occurrence and Pathogenicity Tests In The Weedsmentioning

confidence: 99%

Pythium and Phytopythium species associated with weeds collected in vegetable production fields in Brazil

Barboza

Cabral

Rossato

et al. 2022

Letters in Applied Microbiology

View full text Add to dashboard Cite

show abstract

“…Selected weeds have been widely studied, which allowed identifying fungi associated with them among which are: Microbotryum nepalense (Liro) Vánky, in P. nepalensis (Denchev & Denchev, 2017); Curvularia sp., in D. horizontalis (Flores et al, 2018); Cercospora bidentis E.J. in B. pilosa (Guatimosim et al, 2015); and Colletotrichum sp., in E. bonariensis (Bonacci et al, 2018).…”

Section: Verbenaceaementioning

confidence: 99%

Ecological, phytosanitary, and agronomic aspects of target weeds for biological control studies in Antioquia, Colombia

Mira Taborda,

Castañeda Sánchez,

Morales Osorio

et al. 2023

Acta Agron.

View full text Add to dashboard Cite

Biological control as part of integrated weed management represents an emerging and promising method to minimize the use and impact of herbicides on the environment. The objective of this research was to determine the ecological, phytosanitary, and agronomic status of weeds associated with crops in Antioquia, Colombia, and their potential to be chosen as candidates for biological control studies using pathogenic fungi. The research was carried out through a sampling of weeds in 35 agricultural farms, distributed in 11 municipalities and 10 different crops, on which population ecological variables such as frequency and dominance were evaluated; phytosanitary variables such as incidence and severity of foliar fungal symptoms; as well as some biological and anthropogenic aspects of these, through interviews with the farmers of each farm. The integration of these variables was proposed as an indicator to order and classify the plants according to their greater suitability to be subjected to biocontrol studies. A diversity of 75 weed species was found, with the Poaceae and Asteraceae families standing out, which together represented 43% of the population. 76% of this population presented disease symptoms, presumably of fungal origin, with the severity of up to 10% of the affected leaf area. In 22% of the species agronomic management difficulties greater than 50% were detected on a scale of 1 to 10. We indicate the following twelve weed species as candidates for future biological control studies through phytopathogenic fungi: Rumex crispus L., Digitaria horizontalis (Willd), Persicaria nepalensis (Meisn.) Miyabe, Thunbergia alata Bojer ex Sims, Melinis minutiflora Beauv., Paspalum paniculatum L., Pennisetum clandestinum Hochst. ex Chiov., Pteridium aquilinum (L.) Kunth, Sonchus oleraceus L., Erigeron bonariensis L., Bidens pilosa L., and Artemisia absinthium L. This is the first report of its kind in Colombia.

show abstract

“…(Lopez et al 2021); and phytopathogenic fungi such as Curvularia sp., Fusarium sp., and Pythium sp. (Oliveira et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of smart spray technology for postemergence herbicide application in row middles of plasticulture production

2023

View full text Add to dashboard Cite

Postemergence herbicides to control weeds in the space between raised, plastic-covered beds in plasticulture production systems are typically banded and herbicides are applied to weeds as well as where weeds do not occur. To reduce the incidence of off-targeted applications, the University of Florida developed smart spray technology for row middles in plasticulture systems. The technology detects weed categories and applies herbicides only where they occur. Field experiments were conducted at the Gulf Coast Research and Education Center in Balm, FL, in the Fall 2021 and Spring 2022. The objective was to evaluate the efficacy of postemergence applications of diquat and glyphosate in row middles in jalapeno pepper fields when banded or applied with smart spray technology. The overall precision of the weed detection model was 0.92 and 0.89 for fall and spring respectively. The actuation precision achieved was 0.86 and 1 for fall and spring respectively. No significant differences were observed between banded and targeted applications either with glyphosate or diquat in terms of broadleaf, grass, and nutsedge weed density. No significant pepper damage was observed with either herbicides or application techniques. The smart spray technology reduced herbicide application volume by 26% and 42% for fall and spring respectively, with no reduction in weed control or pepper yield compared to a banded application. Overall, the smart spray technology reduced the herbicide volume applied with no reductions in weed control and no significant effects on crop yield.

show abstract

Seeds of weeds as an alternative host of phytopathogens

Cited by 5 publications

References 14 publications

Pythium and Phytopythium species associated with weeds collected in vegetable production fields in Brazil

Pythium and Phytopythium species associated with weeds collected in vegetable production fields in Brazil

Ecological, phytosanitary, and agronomic aspects of target weeds for biological control studies in Antioquia, Colombia

Evaluation of smart spray technology for postemergence herbicide application in row middles of plasticulture production

Contact Info

Product

Resources

About