Conyza bonariensis growth and development according to thermal time accumulation and photoperiod

Streck, Nereu Augusto; Dalazen, Giliardi; Lencina, Anelise da Silva; Kruse, Nelson Diehl; Silva, Michel Rocha da; Rocha, Thiago Schmitz Marques da; Ribas, Giovana Ghisleni; Zanon, Alencar Júnior; Ulguim, André da Rosa

doi:10.1590/s1678-3921.pab2020.v55.01683

Cited by 5 publications

(3 citation statements)

References 23 publications

(43 reference statements)

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“…This is because at lower temperatures and with a decreasing photoperiod, Conyza spp. can accumulate biomass but show slow development, and when there is an increase in temperature and photoperiod, there is less biomass accumulation, and flowering induction is faster (STRECK et al 2020).…”

Section: Resultsmentioning

confidence: 99%

Control of hairy fleabane in sequential and pre-emergence applications in soybean crops

Silva,

Barros,

Domingos

et al. 2023

Rev. Caatinga

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The control of Conyza spp. can be conducted at different times in the soybean crop. This study aimed to evaluate the efficiency of controlling Conyza spp. by positioning herbicides at different times and their selectivity in the soybean crop. The experiment was conducted under field conditions in a randomized block design with four replications. A first application of 2.4-D + glyphosate (975 + 1500 g of active ingredient [a.i.] ha-1) was conducted, followed by the following treatments: glufosinate (500 g i.a. ha-1), diquat (400 g a.i. ha-1), and saflufenacil + glyphosate (50 + 1500 g a.i. ha-1 ) and a third application of the pre-emergents flumioxazin + imazethapyr (60 + 127 g i. a. ha-1), sulfentrazone + diuron (210 + 420 g a.i. ha-1), diclosulam (35 g a.i. ha-1), and s-metolaclhor (1440 g a.i. ha-1), in addition to the control treatment. High percentages of control were obtained with saflufenacil + glyphosate and diquat. Glufosinate provided satisfactory control seven days after the treatment (DAT) application, with regrowth throughout the evaluations, except when diclosulam was applied. The pre-emergent herbicides reduced the emergence of Conyza spp. resulting in 0.25 plants m-2 when flumioxazin + imazethapyr was applied at 28 DAT. Regardless of the treatment, the soybean crop had no significant phytotoxicity. The management of Conyza spp. with the positioning of herbicides at different times proved to be more efficient when the sequential use of diquat and/or saflufenacil + glyphosate and flumioxazin + imazethapyr in pre-emergence was carried out.

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Section: Resultsmentioning

confidence: 99%

Control of hairy fleabane in sequential and pre-emergence applications in soybean crops

Silva,

Barros,

Domingos

et al. 2023

Rev. Caatinga

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“…Moreover, there was a trend toward greater distribution of individuals in SPN in terms of abundance. The species with the highest density, C. bonariensis (representing 15.53% germinated individuals) shows ample seed production and seed dispersal over long distances, however reductions in seed germination and growth rates may occur in lower temperature conditions (Streck et al, 2020). According to Garwood (1989), seasonality in fruiting and dispersal influences the abundance of species and individuals in a community.…”

Section: Floristic Composition Of the Soil Seed Bankmentioning

confidence: 99%

Complementing seedling planting with nucleation techniques increases forest restoration potential in areas around bauxite mining

Fonseca,

Martins,

Fioresi

et al. 2024

Land Degrad Dev

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The soil seed bank is one of the most important ecological indicators to evaluate and monitor the ecological restoration process of plant communities. We aimed to analyze the influence of two different ecological restoration techniques on the diversity and floristic composition of the soil seed bank and of standing vegetation, in two 4‐year‐old areas under forest restoration around bauxite mining, Southeast Brazil. A total of 30 soil samples were collected in each area (SPN—forest restoration by seedling planting in rows and nucleation techniques between planting rows and SP—forest restoration by seedling planting in rows). The samples were transported to a shade house and evaluated for 6 months, where germinated individuals were counted and identified weekly. A floristic census of shrub/tree species was conducted to assess the diversity of standing vegetation. The results indicated that the soil seed banks of the two areas are floristically similar (predominance of pioneer, herbaceous, and native origin species). The two restoration techniques did not differ in their effects on the species composition of the soil seed bank, mainly due to the restoration age. However, when analyzing the standing vegetation, 38 species were recorded in SPN, while only 20 species were in SP. This result demonstrates that nucleation techniques contributed to the increase in species diversity in SPN. We conclude that combining seedling planting in rows with nucleation techniques (topsoil transposition, direct seeding, and artificial perches) can enhance species diversity in standing vegetation, improve forest functionality, and consequently enhance the potential for forest restoration.

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“…The majority of these studies have been on horseweed ( Erigeron canadensis L.), as it is globally distributed. However, in recent years, more research findings are becoming available on the biology and ecology of hairy fleabane from many parts of the world, including, Australia (Loura et al., 2020; Walker et al., 2011; Wu et al., 2007), Brazil (Streck et al., 2020), Greece (Travlos & Chachalis, 2013), Italy (Dinelli et al., 2008), Spain (Urbano et al., 2007; Zambrano‐Navea et al., 2013), and the United States (Shrestha et al., 2014).…”

Section: Introductionmentioning

confidence: 99%

Hairy fleabane germination in response to temperature, osmotic potential, pH, salinity levels, and seed dormancy periods

et al. 2022

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Hairy fleabane (Erigeron bonariensis L. Cronq.) is an invasive weed in lowdisturbance annual, perennial, and noncrop systems in the San Joaquin Valley (SJV), California. It is often observed emerging year-round in diverse environmental conditions in the SJV. However, very little information is available on the reasons for this. The study aimed to assess the effect of temperature, water potential, salinity, pH level, and dormancy periods on hairy fleabane's germination. Tests were conducted at different day/night temperatures (5:0, 10:5, 15:10, 20:15, 25:20, and 30:25 ˚C), water potential (0 to -5.56 MPa), salinity (0-25 dS m -1 ), and pH (5-9). Germination tests were also performed on seeds the day they were collected from mature plants, and 7, 14, and 21 d later. Tests were conducted in growth chambers set to 20 ˚C or under ambient laboratory conditions at 22 ˚C. About 1% of the seeds germinated at 5 ˚C but maximum germination occurred at 25:20 ˚C. About 9% of the seeds germinated at -0.51 MPa and the estimated value for 50% germination reduction was -0.2 MPa. Seed germination had high tolerance to salinity, as 42% of the seeds germinated at 15 dS m -1 . Germination did not differ across pH levels. About 50% of the seeds germinated the day they were collected, indicating that this species had a very short seed dormancy requirement. These findings could explain why hairy fleabane is observed emerging year-round in the SJV, particularly in irrigated cropping systems. INTRODUCTIONHairy fleabane (Erigeron bonariensis L. Cronq.) is considered to be a native plant of the more temperate parts of South America (Michael, 1977). In the United States, it is now a common annual weed in cropped and noncropped areas of California (Shrestha et al., 2016), and other west coast and southern states (USDA-NRCS, 2021). Thébaud and Abbott (1995) considered this species as a summer annual weed, and it is classified as a summer annual weed in California

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Conyza bonariensis growth and development according to thermal time accumulation and photoperiod

Cited by 5 publications

References 23 publications

Control of hairy fleabane in sequential and pre-emergence applications in soybean crops

Control of hairy fleabane in sequential and pre-emergence applications in soybean crops

Complementing seedling planting with nucleation techniques increases forest restoration potential in areas around bauxite mining

Hairy fleabane germination in response to temperature, osmotic potential, pH, salinity levels, and seed dormancy periods

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