scholarly journals Evaluation of Broadleaf Weeds Control with Selectivity of Post-Emergence Herbicides in Sugar Beet (Beta vulgaris L.)

2014 ◽  
Vol 6 (4) ◽  
pp. 491-497
Author(s):  
Ali Asghar CHITBAND ◽  
Reza GHORBANI ◽  
Mohammad Hassan RASHED MOHASSEL ◽  
Majid ABBASPOOR ◽  
Rahmat ABBASI

The reduction of herbicide applications is a main research priority in recent years. In order to study the effect of individual post-emergence application of sugar beet broad-leaf herbicides at four to six true-leaf stage of weeds, experiments were conducted during 2013. Treatments included untreated control and several rates of desmedipham + phenmedipham + ethofumesate, chloridazon and clopyralid on Portulaca oleracea, Solanum nigrum, Amaranthus retroflexus and Chenopodium album. A completely randomized layout with three replications was used for each herbicide. Three weeks after spraying (WAS), plants were harvested and measured their dry weight. These herbicides were more effective to control Portulaca oleracea than other weeds, thereupon minimum dose required for a satisfactory efficacy of 90% reduction of Portulaca oleracea aboveground dry matter (ED90) were 299.22, 1138.31 and 129.44 g a.i ha-1 of desmedipham + phenmedipham + ethofumesate, chloridazon and clopyralid, respectively. Solanum nigrum was more affected by clopyralid application (132.40 g a.i ha-1), and did not make significant difference in Portulaca oleracea. Chloridazon had lower effect for control of Chenopodium album due to existence of powdery covering on abaxial side of the leaves. Biomass ED50 or ED90, based on log-logistic dose–response curves, for Chenopodium album was considerably higher than other species. These results showed that tank mixtures with other herbicides may be required for satisfactory weed control and reduction in applied herbicides doses.

2019 ◽  
Vol 37 ◽  
Author(s):  
E. IZADI-DARBANDI ◽  
A. ALIVERDI ◽  
M. ANABESTANI ◽  
A. SHAMSABADI

ABSTRACT: The efficacy of reduced (411.5 and 617.2 a.i. ha-1) and recommended (823.0 g a.i. ha-1) rates of phenmedipham + desmedipham + ethofumesate on the control of Amaranthus retroflexus, Amaranthus blitoides, Chenopodium album, and Tribulus terrestris in sugar beet field was investigated when they were tank-mixed with and without Adigor (0.5% v/v), Ammonium sulphate (2% v/v), Citogate (0.2% v/v), D-Octil (0.3% v/v), Hydro-Max (0.5% v/v), and Volck (0.5% v/v). When the herbicide was applied alone, there was no significant difference between the rates of 617.2 and 823.0 g a.i. ha-1 for reduction of total weed density and biomass. Significantly, the adjuvants decreased total weed density and biomass. However, there was no significant difference among the performance of adjuvants. The sugar beet root and sucrose yields were increased significantly by increasing herbicide rate as a result of an improvement in weed control. Although herbicide efficacy was influenced in a similar manner by all the adjuvants, the best results were found as follows: root yield was increased up to 9.66% (71.31 Mg ha-1) by applying the recommended rate of phenmedipham + desmedipham + ethofumesate plus Adigor compared to weed-free check (64.68 Mg ha-1) whereas sucrose yield was increased up to 26.48% (13.21 t ha-1) by applying the recommended rate of phenmedipham + desmedipham + ethofumesate plus HydroMax compared to weed-free check (10.45 t ha-1). From an economic and ecological standpoint, these two adjuvants can be suggested to optimize the recommended rate of phenmedipham + desmedipham + ethofumesate in weed management.


2008 ◽  
Vol 54 (No. 3) ◽  
pp. 108-116 ◽  
Author(s):  
M. Jursík ◽  
J. Holec ◽  
J. Soukup ◽  
V. Venclová

Small plot trials were carried out in years 2001–2003 with sugar beet. In the treatment without weed control, dry weight of sugar beet top and LAI of sugar beet were very low (approx. 50 g/m<sup>2</sup> and 0.5 m<sup>2</sup>/m<sup>2</sup>, respectively). Yield loss of sugar beet was 80–93%. Dominant weeds were <I>Chenopodium album, Fumaria officinalis</I> and <I>Galium aparine</I>. In the treatments where weeds were removed (by hand) until 4 leaf stage of sugar beet, dry weight of sugar beet top and LAI of sugar beet at first increased normally, but were markedly decreased from the half of the vegetation period. Yield loss of sugar beet was 54–28%. Dominant weed in this treatment was <I>Amaranthus retroflexus</I>. The development of sugar beet top dry weight and LAI of sugar beet was practically identical in the treatments where weeds were removed until 8–10 leaf stage of the crop and in those where weeds were removed during the whole vegetation period (500–900 g/m<sup>2</sup>, or 4–7 m<sup>2</sup>/m<sup>2</sup>, respectively). No yield loss of sugar beet was recorded. Dry weight of weeds did not exceed 30 g/m<sup>2</sup> and LAI 0.1 m<sup>2</sup>/m<sup>2</sup>. <I>A. retroflexus</I> and <I>Mercurialis annua</I> were the most frequent weeds in this treatment.


1992 ◽  
Vol 40 (1) ◽  
pp. 11-19
Author(s):  
C.M.J. Bloemhard ◽  
M.W.M.F. Arts ◽  
P.C. Scheepens ◽  
A.G. Elema

Propagules of 7 plant species were subjected to heat treatments comparable to industrial processing. Propagules of all species, which had been preincubated 1 day in pig slurry, responded to heat treatment in an oven in the range from 50 to 104 degrees C. Brassica napus and Solanum nigrum were the most heat-sensitive species. The viability of their seeds was greatly reduced after 15 min at 50 degrees C. Seeds of Amaranthus retroflexus, B. napus, Chenopodium album and S. nigrum were inactivated after 3 min at 75 degrees C, seeds of Echinochloa crus-galli and tubers of Cyperus esculentus after 3 min at 90 degrees , whereas seeds of Abutilon theophrasti only slightly responded to 3 min at 104 degrees . Heating seeds of A. theophrasti at 104 degrees with steam resulted in much less viability than heating at the same temperature in the oven. More than 1 day preincubation in slurry positively affected thermal inactivation of E. crus-galli seeds and C. esculentus tubers at 75 degrees , but not of A. theophrasti seeds at 75, 90, and 104 degrees . (Abstract retrieved from CAB Abstracts by CABI’s permission)


2012 ◽  
Vol 64 (3) ◽  
pp. 133-140
Author(s):  
Andrzej Woźniak

A field experiment was conducted in the period 2007- 2009 in the Uhrusk Experimental Farm (Lublin region) belonging to the University of Life Sciences in Lublin. Different tillage systems - plough and ploughless tillage - were the experimental factors. In the plough tillage system, tillage involved skimming done after the harvest of the forecrop and autumn ploughing. In the ploughless tillage system, only the herbicide Roundup 360 SL (active substance - glyphosate) was applied after the harvest of the forecrop. In both tillage treatments, spring tillage involved field cultivating and the use of a tillage assembly consisting of a cultivator, cage roller, and harrow. The present experiment evaluated weed infestation of the crop expressed by the number and air-dry weight of weeds and their species composition. Under the conditions of ploughless tillage, air-dry weight of weeds in the spring wheat crop was shown to increase significantly compared to plough tillage. The tillage systems under comparison did not differentiate the number of weeds per 1 m<sup>2</sup>. Spring wheat sown using plough tillage was colonized most extensively by the following weed species: <i>Avena fatua</i> L., <i>Stellaria media</i> (L.) Vill., <i>Galium aparine</i> L., <i>Amaranthus retroflexus</i> L., <i>Chenopodium album</i> L., and <i>Consolida regalis</i> Gray. In the ploughless tillage treatments, the following weeds were predominant: <i>Stellaria media</i> (L.) Vill., <i>Avena fatua</i> L., <i>Fallopia convolvulus</i> (L.) A. Löve, <i>Papaver rhoeas</i> L., <i>Amaranthus retroflexus</i> L., <i>Galium aparine</i> L., and <i>Chenopodium album</i> L.


2020 ◽  
Vol 4 (3) ◽  
pp. 492-504
Author(s):  
Mesut SIRRI ◽  
Cumali ÖZASLAN

Sebzeler taze olarak da tüketildiğinden hem zehirli yabancı otlarla karışık olmaması hem de pestisit kalıntısı içermemesi gerekmektedir. Bu nedenle sebze alanlarında görülen yabancı otların belirlenmesi hem insan sağlığı hem de yabancı ot kontrolü yönüyle büyük önem taşımaktadır. Uygun iklim koşullarının da bir sonucu olarak Siirt ilinde sebze üretim alanları sürekli artmaktadır. Ancak yörede sebzede sorun olan yabancı otların saptanmasına yönelik olarak daha önce herhangi bir çalışma yapılmamıştır. Bu nedenle Siirt ilinde toplam 40 tarlada sürvey çalışmaları gerçekleştirilmiştir. Sürveylerde sebze ekim alanlarında sorun olan yabancı ot türleri ve bunların rastlanma sıklıkları ile yoğunluklarının belirlenmesi hedeflenmiştir. Araştırmayla çalışma alanında 20 familyaya ait 52 farklı yabancı ot türü tespit edilmiştir. Saptanan yabancı otlardan 3’ünün tam parazitik ve 11’inin dar yapraklı olduğu diğerlerinin ise geniş yapraklı oldukları saptanmıştır. Dar yapraklı yabancı otlardan en fazla rastlanan ve en fazla yoğunluk oluşturan türlerin; Sorghum halepense (%67,5), Echinocloa crus-galli (%22,50) ve Cynodon dactylon (%17,5) olduğu saptanmıştır. Bölgede en fazla görülen ve yoğunluk oluşturan geniş yapraklı yabancı otların ise; Portulaca oleracea (%92,0), Amaranthus retroflexus (%82,0), Chrozophora tinctoria (%82,0), Alhagi pseudalhagi (%77,0), Solanum nigrum (%72,0), Heliotropium europaeum (%70,0), Amaranthus albus (%67,0), Xanthium strumarium (%65,0) ve Convolvulus arvensis (%57,5) olduğu belirlenmiştir.


2017 ◽  
Vol 9 (3) ◽  
pp. 433-442
Author(s):  
Ali Asghar CHITBAND ◽  
Reza GHORBANI ◽  
Mohammad Hassan RASHED MOHASSEL ◽  
Mahbubeh NABIZADE

Chlorophyll fluorescence analysis is a simple and rapid method for detecting herbicide effects after a short time following their application in photosynthetic apparatus in plants. Chlorophyll fluorescence measurements were carried out against two broad of weeds to describe how the Kautsky curve and its parameters were affected by herbicides. Desmedipham + phenmedipham + ethofumesate changed the chlorophyll fluorescence induction curve at all time intervals except four hours after spring (HAS) in Amaranthus retroflexus L. and at all doses of Portulaca oleracea L. 4 HAS. In contrast, chlorophyll fluorescence inhibition was evident by chloridazon at doses of 650 and 325 g a.i. ha-1 in P. oleracea and A. retroflexus respectively, for all time intervals. Furthermore, chlorophyll fluorescence decays only occurred by clopyralid in A. retroflexus at the highest dose. A biomass effective dose (ED50 and/or ED90) based on log-logistic dose-response curves for A. retroflexus were considerably higher than that of P. oleracea. The maximum quantum efficiency (FV/Fm) was stable, whereas the relative changes at the J step (Fvj) and area (the area between the Kautsky curve and the maximum fluorescence (Fm)) was more sensitive to all three herbicides. There was a relatively good correlation between fluorescence parameters taken 24 hours after the spraying and the dry matter taken three weeks later, for both species under study.


1984 ◽  
Vol 39 (5) ◽  
pp. 440-442 ◽  
Author(s):  
J.L.P. van Oorschot ◽  
P.H. van Leeuwen

The rate of photosynthesis in intact leaves of a triazine-resistant biotype of Amaranthus retroflexus was about 15% lower than that of a triazine-susceptible biotype. Differences in photosynthesis between resistant and susceptible biotypes of Polygonum lapathifolium, Poa annua and Solanum nigrum were not significant, and absent in Chenopodium album and Stellaria media. The results are brought in relation to the appearance of resistant biotypes in the field.


HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 471c-471
Author(s):  
Eric B. Bish ◽  
Thomas A. Bewick ◽  
Donn G. Shilling

Laboratory experiments were conducted to evaluate the relationship between leaf area, leaf number, dry weight, and mg extract of Lycopersicon hirsutum (LA 1777) leaf washes and germination or root growth of common purslane (Portulaca oleracea) seeds. Additional experiments were conducted to determine the relationship between L. hirsutum (accessions 1777 and 1625) leaf washes and germination or root growth of common purslane seeds. Activity of separated sesquiterpenes from trichomes were compared to crude leaf washes. Results from the leaf washes of the L. hirsutum accessions (1777 and 1625) indicated that there was no significant difference between hexane leaf washes, methanol leaf washes, or crude leaf extracts when common purslane was used as the assay species. The accession 1777 was greater than 800 x more inhibitory to germination and greater than 300x more inhibitory to root growth of purslane seeds than accession 1625.


2016 ◽  
Vol 69 (1) ◽  
Author(s):  
Krzysztof Domaradzki ◽  
Anna Jezierska-Domaradzka

<p>Field studies were carried out in 1989–1995 and 2006–2012 on plantations of sugar beet (<em>Beta vulgaris</em> L. subsp. <em>vulgaris</em>). During this period, 542 phytosociological relevés were made using the Braun-Blanquet method. In total, 46 weed species were found. In 1989–1995, the occurrence of 36 segetal species was reported. The highest cover indices were determined for <em>Chenopodium album</em> and <em>Amaranthus retroflexus</em>. <em>Galium aparine</em>, <em>Echinochloa crus-galli</em>, and <em>Elymus repens</em> were the dominant species, as well. Analysis of the frequency of occurrence revealed one constant species (<em>Chenopodium album</em>), two frequent species (<em>Amaranthus retroflexus</em> and <em>Galium aparine</em>), and two medium-frequent species (<em>Echinochloa crus-galli</em> and <em>Matricaria maritima</em> ssp. <em>inodora</em>).</p><p>In 2006–2012, the occurrence of 40 weed species on the sugar beet plantations was recorded. The plantations were clearly dominated by <em>Chenopodium album</em>, accompanied by <em>Polygonum persicaria</em> and <em>Polygonum lapathifolium</em> ssp. <em>lapathifolium</em>. Other dominant species comprised <em>Setaria viridis</em>, <em>Galinsoga parviflora</em>, <em>Brassica napus</em> ssp. <em>napus</em>, and <em>Fallopia convolvulus</em>. The <em>Chenopodium album</em> was a constant component of the sugar beet plantations. In turn, no frequent species were observed and six medium-frequent species were found (<em>Setaria viridis</em>, <em>Galinsoga parviflora</em>, <em>Brassica napus</em> ssp. <em>napus</em>, <em>Echinochloa crus-galli</em>, <em>Amaranthus retroflexus</em>, and <em>Capsella bursa-pastoris</em>).</p><p>Noteworthy, the presence of previously unreported species, e.g., <em>Abutilon theophrasti</em>, <em>Hyoscyamus niger</em>, or <em>Artemisia vulgaris</em>, was revealed. These species are rare components in sugar beet crops. A reverse phenomenon, i.e., the disappearance of some species such as <em>Euphorbia helioscopia</em>, <em>Malva neglecta</em>, <em>Rumex acetosella</em>, <em>Sinapis arvensis</em>, or <em>Sisymbrium officinale</em>, was also observed.</p>


Plant Disease ◽  
2016 ◽  
Vol 100 (10) ◽  
pp. 2043-2049 ◽  
Author(s):  
C. G. Orfanidou ◽  
P. G. Pappi ◽  
K. E. Efthimiou ◽  
N. I. Katis ◽  
V. I. Maliogka

Tomato chlorosis virus (ToCV) is implicated in tomato yellows disease in many countries worldwide. It has a wide host range, including cultivated species as well as arable weeds, and it is transmitted in a semipersistent manner by at least five whitefly species or biotypes of the genera Trialeurodes and Bemisia. ToCV is not seed transmitted and more than 36 weed species have been recorded as natural reservoirs, acting as unique sources both for the virus and its vectors when susceptible crops are harvested. In this study, experiments were conducted to determine the transmission parameters of ToCV by biotype Q, the most abundant biotype of Bemisia tabaci in Greece. Results showed that biotype Q is an efficient vector of ToCV and it is able to retain the virus for at least 6 days. This vector was then used for the evaluation of four widespread weed species (Solanum nigrum, Sonchus oleraceus, Amaranthus retroflexus, and Chenopodium album) as ToCV sources through transmission experiments. Solanum nigrum was shown to be the most significant viral source among the tested weeds, followed by Sonchus oleraceus, A. retroflexus, and, lastly, C. album. Nevertheless, none of them was as efficient a ToCV source as tomato. This variation could be attributed to differences in virus concentration in each plant species or possible host preference by the whitefly vector.


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