scholarly journals Eficiência de controle de cipó-de-veado por glyphosate e glyphosate + 2,4-D em diferentes horários de aplicação

2016 ◽  
Vol 15 (4) ◽  
pp. 380
Author(s):  
Cleber Daniel de Goes Maciel ◽  
Cesar Eduardo Lourenço Iuchemin ◽  
Michel Vicentin de Souza ◽  
André Augusto Pazinato da Silva ◽  
Ricardo André Kloster Karpinski ◽  
...  
Keyword(s):  
Polygonum Convolvulus

As aplicações de herbicidas são normalmente realizadas em condições ambientais específicas que podem influenciar a eficácia dos produtos. Este trabalho foi realizado com o objetivo de avaliar a influência de horários de aplicação dos herbicidas glyphosate e glyphosate + 2,4-D no controle da planta daninha cipó-de-veado (Polygonum convolvulus). O experimento foi desenvolvido com vasos em condições de campo. Os tratamentos foram constituídos pelos herbicidas glyphosate (960 g ha-1) e glyphosate + 2,4-D (960 + 335 g ha-1), ambos aplicados em 25 e 26/09/2015, nos horários de 22:00 h, 3:00 h, 7:00 h; 12:00 h e 17:00 h e uma testemunha sem aplicação, para o controle da planta daninha cipó-de-veado. As unidades experimentais foram constituídas por vasos plásticos com 4 plantas em estádio de 3 a 5 folhas, mantidas em condições naturais da aplicação até os 28 DAA (dias após aplicação). As aplicações foram realizadas com um pulverizador costal com quatro pontas de pulverização AVI110.02, pressão de 210 kPa, velocidade de deslocamento de 3,6 km h-1 e taxa de aplicação de 200 L ha-1. Os resultados indicaram que glyphosate e glyphosate + 2,4-D controlaram eficientemente a planta daninha a partir dos 14 DAA, independentemente do horário da aplicação. Entretanto, foram constatadas reduções significativa na eficiência de controle e produção de matéria seca da parte aérea da planta daninha no horário das 12:00 h, assim como menor deposição de glyphosate + 2,4-D, em todos os horários das aplicações.

Peronospora rumicis. [Descriptions of Fungi and Bacteria].

1994 ◽  
Author(s):  
G. Hall
Keyword(s):  
South Africa ◽  
New Zealand ◽  
Geographical Distribution ◽  
Dense Layer ◽  
Republic Of Georgia ◽  
Rumex Acetosa ◽  
Polygonum Convolvulus ◽  
Plant Remains ◽  
Rain Splash ◽  
Roll Back

Abstract A description is provided for Peronospora rumicis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Emex spinosa, Polygonum convolvulus, Rumex acetosa, R. acetosella, R. alpestris (= R. arifolius), R. auriculatus, R. aviculare, R. hastatus, R. lunaria, R. longifolius, R. montanus, R. patienta, R. polyanthemus, R. repens, R. scutatus, R. thyrsifolius, R. tuberosus, R. vesicarius. DISEASE: Downy mildew of Rumex. Both leaves and flowers are infected. On R. acetosella, the plant remains upright following infection and the upper leaves crumple. In other Rumex species, infected leaves become covered in a very dense layer of violet-coloured felt on their undersurface, whereas a grey felt layer develops on flowers. Leaves become yellowish and their margins roll back (39, 159). GEOGRAPHICAL DISTRIBUTION: Africa: Libya, Morocco, South Africa. Asia-Temperate: Azerbaijan, Republic of Georgia, Israel, Kazakhstan, Kirghizistan, Stavropol. Asia-Tropical: India. Australasia: New Zealand. Europe: Austria, Cyprus, Czechoslovakia, Denmark, Eire, Estonia, Faeroes, Finland, France, Germany, Hungary, Italy, Latvia, Norway, Poland, Romania, Russia (Novgorod, St. Petersburg, Smolensk, Yaroslavl), Serbia, Sweden, Switzerland, Ukraine, UK (England, Scotland), Yugoslavia. TRANSMISSION: By conidia which are dispersed by wind or rain-splash. Mycelium perennates in the root.

Peronospora rumicis. [Distribution map].

1994 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
New Zealand ◽  
Geographical Distribution ◽  
Tamil Nadu ◽  
Himachal Pradesh ◽  
Republic Of Georgia ◽  
Distribution Map ◽  
Polygonum Convolvulus ◽  
Irish Republic ◽  
New Distribution

Abstract A new distribution map is provided for Peronospora rumicis Corda. Hosts: Rumex spp., Emex spinosa, Polygonum convolvulus. Information is given on the geographical distribution in AFRICA, Libya, Morocco, South Africa, ASIA, Azerbaidzhan, Republic of Georgia, India, Himachal Pradesh ,; Maharastra, Tamil Nadu, Israel, Kazakhstan, Kirghizia, AUSTRALASIA & OCEANIA, New Zealand, EUROPE, Austria, Czechoslovakia, Cyprus, Denmark, Estonia, Faroes, Finland, France, Germany, Hungary, Irish, Republic Italy, Latvia, Lithuania, Norway, Poland, Portugal, Romania, Russia, European, Caucasus, Sweden, Switzerland, Ukraine, UK, England, Scotland, Yugoslavia.

Comparison of weed communities in Manitoba ecoregions and crops

2000 ◽  
Vol 80 (4) ◽  
pp. 963-972 ◽  
Author(s):  
R. C. Van Acker ◽  
A. G. Thomas ◽  
J. Y. Leeson ◽  
S. Z. Knezevic ◽  
B. L. Frick
Keyword(s):  
Weed Management ◽  
Amaranthus Retroflexus ◽  
Weed Species ◽  
Canada Thistle ◽  
Wild Mustard ◽  
Polygonum Convolvulus ◽  
Weed Communities ◽  
Green Foxtail ◽  
Poaceae Family ◽  
Weed Survey

In 1997, a weed survey was conducted during July and August in fields of wheat, barley, oat, canola and flax in Manitoba. Field selection was based on a stratified-random sampling methodology using ecodistricts as strata. Species in the Poaceae family were most commonly observed in the survey, followed by species in the Polygonaceae, Asteraceae and Brassicaceae families. The six most abundant weed species were green foxtail [Setaria viridis (L.) Beauv.], wild oats (Avena fatua L.), wild buckwheat (Polygonum convolvulus L.), Canada thistle (Cirsium arvense L.), redroot pigweed (Amaranthus retroflexus L.) and wild mustard (Sinapis arvensis L.). The survey highlighted significant differences between ecoregions and between crops in residual weed infestations. The weed community in the Boreal Transition ecoregion was dominated by seven species, whereas fields in the Aspen Parkland and Lake Manitoba Plain ecoregions were dominated by two species and the Interlake Plain ecoregion was dominated by only one species. Although significant differences were found between the weed communities in crops, they were not as great as differences between ecoregions. The Manitoba residual weed community in 1997 was very similar to that reported for 1978–1981 and 1986, suggesting that the same species should remain a focus for weed management. Key words: Weed survey, weed relative abundance, weed distributions, Manitoba ecoregions

Selectivity of Dicamba in Wheat and Wild Buckwheat

Weed Science ◽  
1971 ◽  
Vol 19 (5) ◽  
pp. 598-601 ◽  
Author(s):  
P. C. Quimby ◽  
John D. Nalewaja
Keyword(s):  
Triticum Aestivum ◽  
Wild Buckwheat ◽  
Interspecific Differences ◽  
Polygonum Convolvulus ◽  
Anisic Acid

The uptake, translocation, and fate of14C-labeled 3,6-dichloro-o-anisic acid (14C-dicamba) were studied in wheat (Triticum aestivumL., 'Selkirk’) and wild buckwheat (Polygonum convolvulusL.) as resistant and susceptible species, respectively. Selectivity could not be explained by interspecific differences in uptake of14C-dicamba by leaf sections submerged in exogenous solutions.14C-dicamba accumulated in meristems of wild buckwheat but not in the youngest tillers of wheat. Moreover, wheat main culms conjugated or metabolized14C-dicamba more quickly than did wild buckwheat meristems. Therefore, selectivity of dicamba apparently was related to interspecific differences in translocation and metabolism.

Effect of Dicamba on RNA and Protein

Weed Science ◽  
1971 ◽  
Vol 19 (3) ◽  
pp. 301-305 ◽  
Author(s):  
W. E. Arnold ◽  
John D. Nalewaja
Keyword(s):  
Callus Tissue ◽  
Growth Stages ◽  
Wheat Growth ◽  
Wild Buckwheat ◽  
Plant Parts ◽  
Temperature And Precipitation ◽  
Boot Stage ◽  
Polygonum Convolvulus ◽  
Anisic Acid

The effect of 3,6-dichloro-o-anisic acid (dicamba) was studied on wild buckwheat (Polygonum convolvulusL.) and wheat (Triticum aestivumL.) at two growth stages. Wild buckwheat, treated when 5 to 8 cm tall, was very susceptible to dicamba which caused rapid dehydration of the leaves and growth of callus tissue at stem internodes. Wild buckwheat, treated when flowering, increased in growth 2 days after treatment and then decreased after 4 days. Wheat growth tended to increase in all plant parts after treatment with dicamba at both the 2 to 3-leaf and the boot stages. Dicamba increased the RNA and protein content in wild buckwheat at both growth stages and in wheat at the boot stage. Dicamba affected the transition temperature and precipitation of reconstituted nucleohistone but not the uncombined nucleic acid or histonein vitro, indicating that a DNA-histone-dicamba complex had occurred. The binding of dicamba to protein varied with different proteins and reduced the UV absorbance of the bound proteins.

Weed Survey System used in Saskatchewan for Cereal and Oilseed Crops

Weed Science ◽  
1985 ◽  
Vol 33 (1) ◽  
pp. 34-43 ◽  
Author(s):  
A. Gordon Thomas
Keyword(s):  
Growing Season ◽  
Agricultural Extension ◽  
Sampling Procedure ◽  
Distribution Maps ◽  
Agricultural Extension Service ◽  
Polygonum Convolvulus ◽  
Green Foxtail ◽  
Survey System ◽  
Weed Survey

A weed survey system methodology was developed and used annually for 4 yr in the province of Saskatchewan. Based on a stratified random sampling procedure, fields were selected in wheat (Triticum aestivumL.), barley (Hordeum vulgareL.), oat (Avena sativaL.), rye (Secale cerealeL.), rape (Brassica napusL.,Brassica campestrisL.), and flax (Linum usitatissimumL.) crops. The boundaries of the 43 agricultural extension districts in the province formed the strata. The provincial agricultural extension service provided staff to conduct the survey. Computer processing of the data enabled reports, containing summary tables and distribution maps, to be distributed to extension, research, and industry personnel within 3 months after completion of the field survey. The field surveys were conducted late in the growing season before harvest commenced; hence, the weed populations consisted of species that had been present during the early part of the growing season and may have contributed to yield losses. During the 4 yr of the survey, weeds were counted in 4423 fields. Of the 164 species recorded, 97 species occurred in more than three fields. Only 29 species were encountered frequently in the fields. Green foxtail [Setaria viridis(L.) Beauv. # SETVI), wild buckwheat (Polygonum convolvulusL. # POLCO), and wild oat (Avena fatuaL. # AVEFA) were the top three species based on a ranking system using a measure called relative abundance.

Herbicide Mixtures for Control of Water Smartweed (Polygonum amphibium) and Wild Buckwheat (Polygonum convolvulus) in Potato

2014 ◽  
Vol 28 (2) ◽  
pp. 401-407 ◽  
Author(s):  
Thomas K. Gitsopoulos ◽  
Christos A. Damalas ◽  
Ioannis Georgoulas
Keyword(s):  
Weed Management ◽  
Potato Cultivar ◽  
Potato Production ◽  
Field Trials ◽  
Difficult Problem ◽  
Northern Greece ◽  
Perennial Weed ◽  
Wild Buckwheat ◽  
Polygonum Convolvulus ◽  
Herbicide Mixtures

Water smartweed, an uncommon but troublesome perennial weed of the knotweed family (Polygonaceae), has been endemic with its terrestrial growth form in the area of Kato Nevrokopi in northern Greece, one of the most important potato-growing areas of the country. Two field trials were conducted in 2011 to study the response of water smartweed, wild buckwheat (an annual weed also of the knotweed family), and two potato cultivars (‘Agria' and ‘Banba') to various mixtures of metribuzin and pendimethalin, the two most commonly used herbicides for PRE weed management in potato in Greece. Herbicide mixtures consisted of pendimethalin plus metribuzin, pendimethalin plus rimsulfuron, metribuzin plus rimsulfuron, metribuzin plus prosulfocarb, metribuzin plus flufenacet, and pendimethalin plus metribuzin plus rimsulfuron applied preemergence. Metribuzin and pendimethalin were also applied alone. Water smartweed was difficult to control at the treatments and rates tested. Among all mixtures, a premixture of metribuzin plus prosulfocarb at 320 + 3,200 g ai ha−1provided the greatest control of water smartweed (47%) and wild buckwheat (87%). Herbicide treatments did not cause detrimental effect on growth of either potato cultivar, and marketable tuber yield generally improved with application of mixtures when compared with metribuzin or pendimethalin applied alone. Control of water smartweed in northern Greece potato production remains a difficult problem to solve, suggesting that until new herbicides are registered for use in potato in Greece, other options of weed control should be sought.

RESULT OF HERBICIDES APPLIED AGAINST OF WEEDS IN SOYBEAN FIELD

2015 ◽  
Vol 13 (2) ◽  
pp. 76-79
Author(s):  
O Ariunaa ◽  
M Otgonsuren
Keyword(s):  
Chenopodium Album ◽  
Herbicide Application ◽  
Weed Species ◽  
Convolvulus Arvensis ◽  
Couch Grass ◽  
Soybean Field ◽  
Small Areas ◽  
Polygonum Convolvulus ◽  
Perennial Weeds ◽  
Field Bindweed

Herbicides, if used properly, are safe and effective in controlling weeds in soybean. The choice of herbicide, however, depends on the predominant weed species and the availability of the herbicide. Chemical control is currently the most widely used control for soybean crops, due to its ease of control and to the small areas planted in Mongolia. In the soybean field the 15species of weeds belonging to 9 families, 12 genus including 62.5 % annual, 37.5%perennial weeds are distributed.The major grassy weeds; Common millet-(Panicummiliaceum L), Couch grass-(Agropyronrepens L), Bristlegrass-(Seteriaviridis L) sp and broadleaved weeds Redroot Pigweed-(Amaranthtusretro flexus),lambs guarters-(Chenopodium album), AristateGoosfoot-(Chenopodiumaristatum L), Black bindweed-(Polygonum convolvulus), Mallow weed-(Malvamochileviensis Down), Field bindweed-(Convolvulus arvensis), Bristhly thistle-(Cirsiumsetosum ), Dwarf bifurcate cinquefoil -(Potentillabifurca), Perennial Sowthisle-(Sonchusarvensis L) weeds have been distributed in the soybean field.In soybean field the Forward herbicide were applied in doses of 1.0-1.2l/ha have reduced the number of weeds by 90.1-91.6%, weight by 59.5-66.1% and super herbicide Gallantsuper applied in doses of 0.45-0.65l/ha have reduced the number of weeds by 91.0-95.0%, weight by 39.5-59.8% while Cobra herbicide applied in doses of 0.45-0.55l/ha used in broadleaved weed distributed field, have reduced the number of weeds by 90.2-94.6% and weight by 42.7-50.7%. The herbicide application increased of yield hectare by 3.6-9.0 center.Mongolian Journal of Agricultural Sciences Vol.13(2) 2014: 76-79

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