scholarly journals Az ázsiai gyapjúfű (Eriochloa villosa) elterjedésének vizsgálata Borsod-Abaúj-Zemplén megye északi részén

Kitaibelia ◽  
2020 ◽  
Vol 25 (1) ◽  
Author(s):  
Viktor Virók ◽  
Tünde Farkas ◽  
Cecília Krajnyák
Keyword(s):  
Eriochloa Villosa

Az Eriochloa villosa (Thunb.) Kunth első magyarországi adata 2007-ből származik. Az azóta eltelt idő­szakban a faj intenzíven terjedt, az ország több pontján megjelent. A felmérések során Bor­sod-Abaúj-Zemplén megye északi részén vizsgáltuk a faj jelenlegi elterjedését. Arra kerestük a vá­laszt, hogy első megtelepedésének környékén mekkora területen terjedt el és ettől a területtől el­kü­lö­nül­ten, a vizsgált terület más részén is megjelent-e. A közleményben áttekintjük a hazai és az or­szág­ha­tár közeléből származó külföldi adatokat is. A felmérés során 58 lokalitásban találtuk meg a fajt, el­ső­sor­ban szántó­földeken, parlagokon, de zavart gyepekben is előfordult. Az 2007-ben megtalált lelőhely kör­nyezetében nagy területen elterjedt, de attól távolabb is megjelent, így a Sajó- és Bódva-völgyben, il­let­ve a Csere­hátban. Az Eriochloa villosa további terjedésére kell számítanunk, különösen az intenzív szán­tóföldi művelés alatt álló területeken, a zavart nyílt gyepeken, de megjelenése elképzelhető nyílt ter­mészetes élőhelyeken is.

Emergence characteristics of four annual weed species

Weed Science ◽  
1999 ◽  
Vol 47 (5) ◽  
pp. 578-584 ◽  
Author(s):  
Robert G. Hartzler ◽  
Douglas D. Buhler ◽  
David E. Stoltenberg
Keyword(s):  
Initial Time ◽  
Grass Species ◽  
First Year ◽  
Weed Species ◽  
Emergence Period ◽  
Seed Sources ◽  
Amaranthus Rudis ◽  
Eriochloa Villosa ◽  
Broadleaf Species ◽  
Emergence Date

Emergence characteristics, including initial time of emergence, magnitude of emergence, and mean time of emergence, ofAmaranthus rudisSauer,Setaria faberiHerrm.,Eriochloa villosa(Thunb.) Kunth, andAbutilon theophrastiMedik. were studied in central Iowa during the first 3 yr following burial of seed collected and buried in the fall of 1994 or 1995. Although the initial emergence date varied among years, the emergence sequence among species was consistent.Eriochloa villosaand A.theophrastiwere the first species to emerge, with initial emergence occurring between April 28 and May 10. Initial emergence dates for these species were the same, except for 1995 whenA. theophrastiemerged 4 d prior toE. villosa. Amaranthus rudiswas the last species to emerge, with initial emergence ranging from 5 to 25 d afterA. theophrasti.First-year emergence in 1995 was 8% forA. theophrasti, 7% for A.rudis, 41% forE. villosa, and 33% forS. faberi, based on the number of buried seed. Proportional emergence during the first year following burial in 1996 was similar to 1995 forA. theophrastiandS. faberi, but greater emergence was observed in 1996 forE. villosaandA. rudis.During the 3 yr of both studies, cumulative emergence of the two grass species (43 to 71%) was higher than for the broadleaf species (13 to 35%). A high percentage of the total annual emergence ofE. villosaoccurred within the first 2 wk of initial emergence, whereas a high percentage ofA. rudisemergence occurred late in its emergence period. Emergence characteristics of the four species were consistent among years and seed sources.

Effects ofEriochloa villosadensity and time of emergence on growth and seed production inZea mays

Weed Science ◽  
1999 ◽  
Vol 47 (6) ◽  
pp. 687-692 ◽  
Author(s):  
James A. Mickelson ◽  
R. Gordon Harvey
Keyword(s):  
Seed Production ◽  
Field Experiments ◽  
Seed Mass ◽  
Model Parameters ◽  
Growth Stages ◽  
Vegetative Biomass ◽  
Eriochloa Villosa ◽  
Term Management ◽  
Weed Emergence

Field experiments were conducted in 1997 and in 1998 to determine the effects of density and time of emergence onEriochloa villosagrowth and seed production inZea mays. E. villosawas transplanted at four densities (3, 9, 27, and 81 plants m−2) to simulate emergence at four Z.maysgrowth stages (VE, V2, V5, and V10). Compared toE. villosaplants that emerged withZ. maysplants, total above-groundE. villosabiomass at maturity of plants grown at 3 plants m−2was reduced by 54, 97, and 99% when emergence was delayed until the V2, V5, and V10 stages ofZ. mays, respectively, in 1997. In 1998, total abovegroundE. villosabiomass at maturity was reduced by 70, 87, and 99% when emergence was delayed until the V2, V5, and V10 stages ofZ. mays, respectively.E. villosaaboveground vegetative biomass per plant at maturity was linearly related to seed production per plant in each year.E. villosaseed production m−2decreased nonlinearly as density decreased and time of emergence was delayed. Based on estimated model parameters, maximum seed production was 57,100 and 12,700 seeds m−2in 1997 and 1998, respectively. Within time of emergence,E. villosadensity did not affect seed mass per seed, however, seed mass of late-emerging cohorts was less than that of early-emerging cohorts. Time of weed emergence relative to the crop was a very important factor in determining biomass and seed production. Results suggest that late-emerging plants may not be very important to long-term management ofE. villosa.

scholarly journals Occurrence of woolly cupgrass (Eriochloa villosa /Thunb./ Kunth) in Hajdú-Bihar county, Hungary

2011 ◽  
pp. 119-123
Author(s):  
Noémi Somogyi ◽  
László Szabó ◽  
István Dávid
Keyword(s):  
Weed Management ◽  
Plant Protection ◽  
Deep Layer ◽  
Ground Cover ◽  
Annual Grass ◽  
Weed Species ◽  
Maize Field ◽  
Woolly Cupgrass ◽  
Infected Area ◽  
Eriochloa Villosa

Woolly cupgrass (Eriochloa villosa /Thunb./ Kunth) is native to East Asia, it spreads in several parts of the World and causes difficulties in plant protection, especially in maize. Difficulties in control of Eriochloa villosa originated from several reasons: seeds continue to germinate later in the season, significant part of seeds emerges from a deep layer of the soil, and the species is less susceptible to some herbicides applied to maize than other annual grass weeds.The first report on the occurrence of woolly cupgrass in Hungary was published in 2008, and it reported about the appearance of this species near to Gesztely village (Borsod-Abaúj-Zemplén county), however, no information has been added about spread of the weed in Hungary until now.A significant population was discovered next to Debrecen (Hajdú-Bihar county) in summer, 2011, and then weed associations were examined in maize, sunflower and stubble-fields on several km2 in the area to estimate the Eriochloa villosa infection. The weed species was found on every maize field bordering with a ground cover of 0.5-4%. Woolly cupgrass occurred inside of the 50% of maize fields, and reached a ground cover of 76% in case of most infected area, in addition it was found in sunflower and stubble-fields.The spread of woolly cupgrass is expected in this area, which requires the consideration of this species in the planning of weed management technologies.

scholarly journals Chromosome numbers of invasive and potentially invasive species in the flora of the Republic of Altai. Post V

Turczaninowia ◽  
2021 ◽  
Vol 24 (4) ◽  
pp. 99-107
Author(s):  
Elena Yu. Zykova ◽  
Tatyana V. Pankova ◽  
Maria N. Lomonosova
Keyword(s):  
Chromosome Numbers ◽  
Western Siberia ◽  
Invasive Plant ◽  
Xanthium Strumarium ◽  
Published Data ◽  
Common Distribution ◽  
Cosmos Bipinnatus ◽  
History Of ◽  
Eriochloa Villosa ◽  
The Republic

Chromosome numbers (2n) of 15 invasive and potentially invasive plant species from the families Asteraceae, Brassicaceae, Caryophyllaceae, Malvaceae, Onagraceae, Papaveraceae, Plantaginaceae, Poaceae, Polygonaceae, Portulacaceae, and Rosaceae are reported on the samples collected in the Republic of Altai. To determine the chromosome number (ploidy level), the method of direct counting was used. Among studied species, chromosome complements for Persicaria orientalis (2n = 22), Potentilla norvegica (2n = 42), Veronica persica (2n = 28) were first examined from Russia; for Papaver rhoeas (2n = 14) and Rumex obtusifolius (2n = 20) – from Asian part of Russia; for Bromus squarrosus (2n = 14), Cosmos bipinnatus (2n = 24), and Eriochloa villosa (2n = 54) – from Siberia. Abutilon theophrasti (2n = 42) and Lepidium densiflorum (2n = 32) were first studied from Western Siberia; Epilobium ciliatum subsp. adenocaulon (2n = 36), Portulaca oleracea (2n = 36), Spergularia rubra (2n = 36), and Xanthium strumarium (2n = 36) – from the Republic of Altai. Common distribution and the history of floristic findings of these species in the Republic of Altai are given. Previously published data on chromosome numbers from Russia are cited.

Carbamothioate and Chloroacetamide Herbicides for Woolly Cupgrass (Eriochloa villosa) Control in Corn (Zea mays)

1991 ◽  
Vol 5 (2) ◽  
pp. 331-336 ◽  
Author(s):  
Joseph F. Schuh ◽  
R. Gordon Harvey
Keyword(s):  
Zea Mays ◽  
Field Experiments ◽  
Weather Conditions ◽  
Early Season ◽  
Application Timing ◽  
Late Season ◽  
Adverse Weather Conditions ◽  
Adverse Weather ◽  
Woolly Cupgrass ◽  
Eriochloa Villosa

Field experiments were conducted to compare herbicides applied preplant incorporated (PPI), preplant incorporated/preemergence (PPI/PRE), and preplant incorporated/early postemergence (PPI/early POST) to control woolly cupgrass in corn. Although good early-season control of woolly cupgrass from PPI cycloate plus cyanazine, EPTC plus dietholate or SC-0058, and butylate plus cyanazine sometimes was observed, middle- and/or late-season control was often limited. Generally, better woolly cupgrass control and higher corn yields were obtained from split PPI/PRE applications rather than from single PPI applications of alachlor, metolachlor, and acetochlor. The highest and most consistent full-season woolly cupgrass control resulted when cycloate or EPTC plus dietholate applied PPI was followed by cyanazine plus either pendimethalin, alachlor, metolachlor, or acetochlor applied early POST. However, in 1989 adverse weather conditions near the early POST application timing injured corn and reduced yields.

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