scholarly journals Effects Of Sideration On The Number Of Weeds Used At Different Times

2021 ◽  
Vol 03 (04) ◽  
pp. 31-37
Author(s):  
Yunus Chintoshevich Kenjaev ◽  
Keyword(s):  
Soil Fertility ◽  
Green Manure ◽  
Cynodon Dactylon ◽  
Chenopodium Album ◽  
Solanum Nigrum ◽  
Cyperus Rotundus ◽  
Convolvulus Arvensis ◽  
Perennial Weeds ◽  
Control Option ◽  
Field Bindweed

In keeping up and expanding soil fertility by applying siderite (green manure), increasing the yield of cotton by planting and cultivating pisum, pea, rapeseed, and grain as siderite crops from selected plants; amid cultivation, 39-51 tons of green biomass per hectare was collected in summer and 17-22 tons in autumn, and their effect on weed numbers were determined. In this case, in the experimental field, more perennial weeds were found, such as salomalaykum (Cyperus rotundus L.), field bindweed (Convolvulus arvensis L.), ajrik (Cynodon dactylon (L.) Pers.), and annuals were found in semizoot (Portulaca oleracea L.), white sorghum (Chenopodium album L.), common rosemary (Amaranthus retleflexus L.), ituzum (Solanum nigrum) and others were observed. As a result, the number of yearly and perennial weeds beneath the influence of summer sideration diminished by 2.4-2.6 units compared to the control option before the 1st cultivation between cotton rows, and by 4.6-4.7 units before the final irrigation, or under the influence of autumn sideration. In accordance with the over, a decrease of 2.8-3.1 units was accomplished, and before the final irrigation - to 5.0 units. The most noteworthy reduction in weeds was observed in rapeseed and barley variants utilized as siderates in both experiments.

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

scholarly journals Hıyarda (Cucumis sativus L.) yabancı ot çıkış zamanın tahminine yönelik araştırmalar

2015 ◽  
Vol 3 (5) ◽  
pp. 271
Author(s):  
Nihat Tursun ◽  
İrfan Ersin Akıncı ◽  
Mustafa Şahin ◽  
Ahmet Uludağ
Keyword(s):  
Cynodon Dactylon ◽  
Chenopodium Album ◽  
Growth Curves ◽  
Cubic Spline ◽  
Amaranthus Retroflexus ◽  
Cyperus Rotundus ◽  
Tribulus Terrestris ◽  
Weed Species ◽  
Convolvulus Arvensis ◽  
Cucumis Sativus L

Modelling is carried out for eleven major weeds in cucumber to develop estimated models for weed emergence time. Weed species were grouped according to their emergence patterns. Amaranthus retroflexus, Chenopodium album, Heliotropium europaeum, Polygonum aviculare and Solanum nigrum were early emerging, Convolvulus arvensis, Cyperus rotundus, Cynodon dactylon, Portulaca oleracea and Sorghum halepense were season long emerging Tribulus terrestris was the late emerging weed species. Different non-linear growth curves (Chapman-Richard, Weibull, logistic, Gompertz and cubic spline) fitted to the data of cumulative percent emergence for the different species and years. Cubic spline seemed the best model for many species.

scholarly journals Evaluation of Different Weed Management Practices on Growth Variables and Yield of Wheat Varieties

2020 ◽  
pp. 7-30
Author(s):  
Md. Golam Mostafa ◽  
Syed Arvin Hassan ◽  
Md. Ehsanul Haq ◽  
Md. Ahasan Habib ◽  
Kaniz Fatema ◽  
...  
Keyword(s):  
Grain Yield ◽  
Weed Management ◽  
Management Practices ◽  
Cynodon Dactylon ◽  
Chenopodium Album ◽  
Cyperus Rotundus ◽  
Alternanthera Philoxeroides ◽  
Weed Species ◽  
Wheat Varieties ◽  
Hand Weeding

A field experiment was conducted in medium fertile soil at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during November 2017 to April 2018 in Rabi season with a view to evaluate the performance of wheat varieties under different weed control methods. The experiment was carried out with three varieties i.e. BARI Gom-28, BARI Gom-29 and BARI Gom-30 in the main plot and five weed management methods viz. control (no weeding), two hand weeding at 20 and 40 DAS, Panida 33EC (Pendimethalin) @ 2000 ml ha-1 at 5 DAS pre-emergence, Afinity 50.75WP (Isoproturon) 1500 g ha-1 at 25 DAS as post-emergence herbicide and Panida 33EC (Pendimethalin) @ 2000 ml ha-1 at 5 DAS + Afinity 50.75WP (Isoproturon)1500 g ha-1 at 25 DAS in the sub plot in split plot design. Nine different major weed species were found in the field such as Cynodon dactylon, Cyperus rotundus, Echinochloa colonum, Eleusine indica, Chenopodium album, Alternanthera philoxeroides, Brassica kaber, Leliotropium indicum, Vicia sativa. Results reveled that BARI Gom-30 contributed the highest grain yield 3.01 tha-1. Pre-emergence application of Panida 33EC controlled weeds significantly which showed highest growth followed by yield achieved in wheat. BARI Gom-30 in combination with Panida 33EC produced the highest grain yield 3.52 tha-1 while the lowest grain yield 2.09 t ha-1 was obtained from BARI Gom-28 with no weeding treatment. Results reveled that Panida 33EC (pre-emergence) was found more effective to controlling weeds in wheat. Results of the study finally reveled that Panida 33EC might be considered as a feasible option for combating weed and ensuring higher yield in wheat cultivation.

Effects of Frequent Clipping on Three Perennial Weeds, Cynodon dactylon (L.) Pers., Sorghum halepense (L.) Pers. and Cyperus rotundus L.

1972 ◽  
Vol 8 (3) ◽  
pp. 225-234 ◽  
Author(s):  
Menashe Horowitz
Keyword(s):  
Dry Matter ◽  
Cynodon Dactylon ◽  
Matter Content ◽  
Cyperus Rotundus ◽  
The Other ◽  
Sorghum Halepense ◽  
Tuber Number ◽  
Dry Matter Content ◽  
Purple Nutsedge ◽  
Perennial Weeds

SUMMARYEstablished plants of bermudagrass (Cynodon dactylon (L.) Pers.), johnsongrass (Sorghum halepense (L.) Pers.) and purple nutsedge (Cyperus rotundus L.), grown in containers, were repeatedly clipped to the ground from spring to winter, at monthly and bi-weekly intervals. Regrowth of bermudagrass was markedly reduced after monthly clippings, but all plants regrew in the following March; there was no regeneration in March of bi-weekly clipped plants. Severe decrease of regrowth of clipped johnsongrass occurred after bi-weekly or monthly clippings, but a quarter of the clipped plants regenerated in the following March. Nutsedge was more resistant to clipping than the other two species and all clipped plants regrew vigorously in the following March. Repeated clipping reduced the rhizome length or tuber number and the dry matter content in the regrown plants in proportion to the frequency of clipping.

scholarly journals Weed Flora in Cereal crops of district Bannu

2017 ◽  
pp. 106-124
Author(s):  
REHMAN ULLAH KHAN
Keyword(s):  
Cynodon Dactylon ◽  
Research Work ◽  
Cyperus Rotundus ◽  
Cirsium Arvense ◽  
Cereal Crops ◽  
Convolvulus Arvensis ◽  
Conyza Bonariensis ◽  
The Family ◽  
The Common ◽  
Percentage Data

In the present research work (2016-2018), there was reported 100 genera having 114 species distributed among 37 families. Out of which 5 were of monoct families (with 21 genera and 23 spp.) and 32 families of dicot (with 79 genera & 91 spp.). According to percentage data, it was reported that the weed members of family Poaceae was the greatest in cereal crops having 16.666% spp, while the family Asteraceae was next one with 14.912% weeds spp. Family Boraginaceae and Papilionaceae gaining third position having 6.140% weeds spp. Amaranthaceae, Brassicaceae and Solanaceae having 5.263%, Euphorbiaceae (4.385%), Polygonaceae (3.508%), Zygophyllaceae (2.631%), while the remaining families have less then 2.00 % weeds species. It was reported that Cirsium arvense, Convolvulus arvensis, Conyza bonariensis, Cynodon dactylon, Cyperus rotundus, Parthenium hysterophorus andSonchus asper were the common weed found in all the three important cereal crops i.e wheat, maize and rice.

scholarly journals Efficiency of some herbicides and manual weeding for weed control in irrigated Bt cotton

2018 ◽  
Author(s):  
R.K. Mathukia ◽  
B.K. Sagarka ◽  
P.R. Mathukia ◽  
N.V. Savaliya
Keyword(s):  
Weed Control ◽  
Cynodon Dactylon ◽  
Chenopodium Album ◽  
Dry Weight ◽  
Cyperus Rotundus ◽  
Growth And Yield ◽  
Cotton Field ◽  
Bt Cotton ◽  
Seed Cotton ◽  
Yield Attributes

To evaluate the efficacy of some pre and post-emergence herbicides for weed control in Bt cotton (var. Beejdhan 2), a field experiment was conducted during rainy seasons of 2014-15, 2015-16 and 2016-17 at Junagadh (Gujarat, India). The dominant weed flora in cotton field were Digera arvensis, Eluropus villosus, Cyperus rotundus, Cynodon dactylon, Echinochloa crusgalli, Chenopodium album, Convolvulus arvensis, Trianthema monogyna, Amaranthus spinosus, Commelina benghalensis and Asphodelus tenuifolius. The results revealed that treatments viz., hand weeding (HW) and interculturing (IC) at 30, 60 and 90 DAS, pendimethalin 0.9 kg ha-1 as pre-emergence fb HW and IC at 30 and 60 DAS, and pendimethalin 0.9 kg ha-1 as pre-emergence fb quizalofop 40 g ha-1 as post-emergence at 45 DAS were found superior to the unweeded check in enhancing growth and yield attributes viz., plant height, number of monopodial and sympodial branches plant-1, number of bolls plant-1, single boll weight and seed cotton weight plant-1 and ultimately increased seed cotton and stalk yields. These treatments also recorded lower dry weight of weeds and weed index along with higher weed control efficiency, net return and B:C ratio as compared to unweeded check.

scholarly journals Siirt İlinde Sebze Alanlarında Görülen Yabancı Otlar

2020 ◽  
Vol 4 (3) ◽  
pp. 492-504
Author(s):  
Mesut SIRRI ◽  
Cumali ÖZASLAN
Keyword(s):  
Cynodon Dactylon ◽  
Amaranthus Retroflexus ◽  
Solanum Nigrum ◽  
Portulaca Oleracea ◽  
Sorghum Halepense ◽  
Xanthium Strumarium ◽  
Convolvulus Arvensis ◽  
Heliotropium Europaeum

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.

scholarly journals Response of Occurrence of Winter Weeds to Physico-Chemical Characteristics of Soil of Gandhinagar District, Gujarat, India

2021 ◽  
pp. 343-347
Author(s):  
Dr. Binnyben H. Karlikar ◽  
Prof. Hitesh A. Solanki
Keyword(s):  
Cynodon Dactylon ◽  
Chenopodium Album ◽  
Soil Samples ◽  
Cyperus Rotundus ◽  
Capital City ◽  
Gujarat State ◽  
Cassia Tora ◽  
Physico Chemical ◽  
Trianthema Portulacastrum ◽  
Boerhavia Diffusa

Gandhinagar is the capital city of Gujarat State. The paper deals with the estimation of nutrients (pH, EC, N, P, K, Zn) in soil of different talukas of Gandhinagar district. This district has four talukas with 290 villages and 10 urban habitations in the district. For the study purpose, the entire district was divided into 20 sites. Five sites of each talukas were selected. Total 20 sampling sites were selected to collect samples. The study was carried for a period of 2 year (2011 to 2013). Soil samples were colleted and analysed for their parameters like pH, EC, Nitrate, Phosphorus, Potassium and Zinc (Zn) at monthly. Zn was recorded critical in Mansa and Dehgam taluka and quite low in Kalol taluka. The occurrence types and distribution of Amaranthus viridis L., Achyranthus aspera L., Trianthema portulacastrum L, Boerhavia diffusa L., Cyperus rotundus L., Cynodon dactylon (L.) Pers., Tridex procumbens L., Parthenium hysterophorus L., Euphorbia hirta L., Vernonia cinera (L.) Less., Digera muriata (L.) Mart., Cassia tora L., Chenopodium album L., Portulaca oleracea L. in the study area of Gandhinagar showed relations with the soil in which they occur.

scholarly journals The weeds in onion and their control

Biljni lekar ◽  
2021 ◽  
Vol 49 (5) ◽  
pp. 675-685
Author(s):  
Bojan Konstantinović ◽  
Milena Popov ◽  
Nataša Samardžić ◽  
Tijana Stojanović
Keyword(s):  
Cynodon Dactylon ◽  
Negative Impact ◽  
Chenopodium Album ◽  
Datura Stramonium ◽  
Ambrosia Artemisiifolia ◽  
Control Measures ◽  
Initial Growth ◽  
Convolvulus Arvensis ◽  
Stellaria Media ◽  
Setaria Glauca

The protection of onions from the weeds and their negative impact in the field production is one of the most important measures. The onion is exceptionally succeptible to the weeds, especially in the first phases of the growth, considering the weak initial growth of the crop in comparison with the weeds. The seasonal dynamics of the onion weeds is not so noticeable like with the other crops, while the weeds that appear most frequently are: Amaranthus blitoides, Ambrosia artemisiifolia, Chenopodium album, Cirsium arvense, Convolvulus arvensis, Cynodon dactylon, Datura stramonium, Portulaca oleracea, Setaria glauca and Stellaria media. The chemical control measures mean the herbicide use before or after the emergence of the crop and the weeds. Before the emergence the herbicides based on aclonifen and pendimethaline can be used, while after the emergence herbicides based on fluroxypir, clopyralid, fluazifop-P-butyl, clethodim, quizalofop-P-ethyl, quizalofop-P-tefuryl and propaquizafop are used.

scholarly journals Distribution of economically important weed species in the riparian and roadside vegetation of Serbia

2021 ◽  
Vol 30 (1) ◽  
pp. 51-63
Author(s):  
Ana Anđelković ◽  
Goran Tmušić ◽  
Dragana Marisavljevićna ◽  
Mladen Marković ◽  
Dušanka Cvijanović ◽  
...  
Keyword(s):  
Cynodon Dactylon ◽  
Chenopodium Album ◽  
Arable Land ◽  
Road Networks ◽  
Riparian Areas ◽  
Weed Species ◽  
Convolvulus Arvensis ◽  
Lactuca Serriola ◽  
Negative Effect ◽  
Unstable Environment

Transportation corridors such as waterways and road networks serve as an entranceway for invasive and economically important weed species. The unstable environment of riparian areas and nutrient enrichment of road verges promotes the establishment and spread of these species, which may have a negative effect on nearby arable land, leading to severe yield reductions. We aimed to register the presence and frequency of five selected weed species (Chenopodium album, Cirsium arvense, Convolvulus arvensis, Cynodon dactylon, and Lactuca serriola) within these linear corridors. Sites along waterways were visited during 2013-2016, and road networks during 2018-2019. At each site, studied weed species were registered along 100 m transects, resulting in 250 localities along waterways and 180 near road networks. The most frequent species is C. arvensis, followed by L. serriola and C. album, while less prevalent species are C. arvense and C. dactylon. The main characteristic of studied species is their preference for roadside habitats, except for Chenopodium album, which is more common in riparian areas.

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