scholarly journals Reliable protection of lentils against weeds

2020 ◽  
pp. 53-57
Author(s):  
V. Riznyk
Keyword(s):  
Field Experiments ◽  
Adverse Impact ◽  
Convolvulus Arvensis ◽  
Couch Grass ◽  
Perennial Plants ◽  
Chemical Protection ◽  
Annual Grasses

Goal. To identify the features of the infestation of crops of lentils and improve on this basis, the elements of chemical protection from adverse impact of weeds. Methods. Field experiments were laid out in 2016—2019 according to the scheme: 1. Clogged control. 2. “Clean” control. 3. Gesagard 500 WF + Panther 4%, K. E. (3 l/ ha + 1 l/ ha). 4. Zenkor 70 WG + Targa Super, k.e. (0.6 l/ ha + 1.0 l/ ha). 5. Stomp 330, k.e. + FUSILADE Forte 150 EC, k.e. (3.0 l/ ha + 0.7 l/ ha). Results. The contamination of crops of lentils in the years of research had mixed. As a result of pre-release areas from the presence of perennial plants (couch grass, convolvulus arvensis) weeds, mostly introduced annual grasses and dicotyledonous species. The most widespread in crops were plants of foxtail glaucous — 19.5 pieces/ m2 (22.5% in the structure of impurity), Echinochloa ordinary and 17.3 (19.9%), amaranth thrown back to 10.7 (12.3%), nightshade black — 6,8 pieces/ m2 (7.8%). In General, the time of counts (end of III decade of may) the number of weeds was 86.7 pieces/ m2. Use for protection of lentil combinations of herbicides of soil action of Gezagard 500 FW, k.s. (3.0 l/ ha) and graminicide Panther, 4% k.e. (1.0 l/ ha) reduced the ability of those present in the crops of weeds to form their mass. In average per years of research, the mass of weeds in crops of version 3 testing amounted to a total of 388 g/ m2 or 13.6% of the weedy control. Herbicides provided the reduction of the mass of weeds in 86.4%. Conclusions. In terms of the use of herbicides of Gezagard 500 FW, k.s. (3.0 l/ ha) + Panther, 4% k.e. (1.0 l/ ha) received an average of 1.49 t/ ha of seeds, or 83.7% of the maximum in the testing of the level of harvest. Much more effective was the use Zenkor 70 WG, v.g. (0.6 l/ ha) Targa Super 5% k.e. (1.0 l/ ha) and stomp 330, k.e. (3.0 l/ ha) + FUSILADE Forte 15% k.e. (0.7 l/ ha), which provided the formation of 1.61 and 1.56 t/ ha of seeds, 90.4 and 87.6% of the “clean” control, respectively.

Interference of Three Annual Grasses with Grain Sorghum (Sorghum bicolor)

1990 ◽  
Vol 4 (2) ◽  
pp. 245-249 ◽  
Author(s):  
Brenda S. Smith ◽  
Don S. Murray ◽  
J. D. Green ◽  
Wan M. Wanyahaya ◽  
David L. Weeks
Keyword(s):  
Linear Regression ◽  
Grain Yield ◽  
Field Experiments ◽  
Grain Sorghum ◽  
Grass Species ◽  
Row Spacing ◽  
Yield Data ◽  
Weed Density ◽  
Annual Grasses ◽  
Wide Row Spacing

Barnyardgrass, large crabgrass, and Texas panicum were evaluated in field experiments over 3 yr to measure their duration of interference and density on grain sorghum yield. When grain yield data were converted to a percentage of the weed-free control, linear regression predicted a 3.6% yield loss for each week of weed interference regardless of year or grass species. Grain sorghum grown in a narrow (61-cm) row spacing was affected little by full-season interference; however, in wide (91-cm) rows, interference increased as grass density increased. Data from the wide-row spacing were described by linear regression following conversion of grain yield to percentages and weed density to log10. A separate nonlinear model also was derived which could predict the effect of weed density on grain sorghum yield.

Annual Grass Control in Alfalfa (Medicago sativa) with Postemergence Graminicides

1992 ◽  
Vol 6 (4) ◽  
pp. 938-948 ◽  
Author(s):  
Chester L. Foy ◽  
Harold L. Witt
Keyword(s):  
Medicago Sativa ◽  
Field Experiments ◽  
Annual Grass ◽  
Giant Foxtail ◽  
Herbicide Treatments ◽  
Highly Effective ◽  
Annual Grasses ◽  
Large Crabgrass

Field experiments were conducted during 1982 to 1988 in Virginia to evaluate BAS 517, CGA 82725, clethodim, cloproxydim, fenoxaprop, fluazifop, fluazifop-P, haloxyfop, paraquat, quizalofop, SC-1084, sethoxydim, sethoxydim plus thifensulfuron, and terbacil for control of annual grasses in alfalfa. Herbicides were applied to alfalfa and grasses 2 to 30 cm in height after the first and/or second cuttings. Overall, the herbicides were highly effective in controlling fall panicum, giant foxtail, barnyardgrass, and large crabgrass. Alfalfa yields were not increased with herbicide treatments in several experiments. Only paraquat, applied later than recommended after cutting in one experiment, and sethoxydim plus thifensulfuron at one location reduced alfalfa yields.

Nonvertical Spray Angles Optimize Graminicide Efficacy

2007 ◽  
Vol 21 (4) ◽  
pp. 1029-1034 ◽  
Author(s):  
Peter Kryger Jensen
Keyword(s):  
Growth Stage ◽  
Field Experiments ◽  
Cropping Systems ◽  
Standard Technique ◽  
Northern Europe ◽  
Optimum Growth ◽  
Vertical Leaf ◽  
Annual Crops ◽  
Annual Grasses ◽  
Winter Annual

Annual grasses constitute a major weed problem in winter annual crops in Northern Europe and especially in cropping systems where ploughing is omitted. At the optimum growth stage for control with POST herbicides, grasses have a predominantly vertical leaf orientation. This represents a very difficult spray target using the standard technique where nozzles are mounted more or less vertically downward. In this study, efficacy of the foliar-acting herbicide, haloxyfop, on perennial ryegrass at the two- to three-leaf stage was investigated in field experiments using some alternative configurations of nozzle mounting on the sprayer. Angling the spray either forward or backward relative to the direction of travel increased herbicide efficacy using standard commercially available flat-fan and pre-orifice nozzles. Efficacy increased generally with increasing angling relative to vertically downward and the forward-angled spray improved efficacy most. The largest improvement in efficacy was obtained using a 60° forward-angled spray in combination with a reduced boom height. Using this configuration, herbicide dose could be reduced by approximately 30% without loss of efficacy in comparison with the standard vertical mounting of nozzles. There was no advantage of using combinations of forward- and backward-angled nozzles.

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

Cover Crop and Postemergence Herbicide Integration for Palmer amaranth Control in Cotton

2017 ◽  
Vol 31 (3) ◽  
pp. 348-355 ◽  
Author(s):  
Matthew S. Wiggins ◽  
Robert M. Hayes ◽  
Robert L. Nichols ◽  
Lawrence E. Steckel
Keyword(s):  
Cover Crops ◽  
Weed Management ◽  
Cover Crop ◽  
Field Experiments ◽  
Palmer Amaranth ◽  
Cereal Rye ◽  
Crimson Clover ◽  
Annual Grasses ◽  
Winter Annual ◽  
Hand Weeding

Field experiments were conducted to evaluate the integration of cover crops and POST herbicides to control glyphosate-resistant Palmer amaranth in cotton. The winter-annual grasses accumulated the greatest amount of biomass and provided the most Palmer amaranth control. The estimates for the logistic regression would indicate that 1540 kg ha−1would delay Palmer amaranth emerging and growing to 10 cm by an estimated 16.5 days. The Palmer amaranth that emerged in the cereal rye and wheat cover crop treatments took a longer time to reach 10 cm compared to the hairy vetch and crimson clover treatments. POST herbicides were needed for adequate control of Palmer amaranth. The glufosinate-based weed control system provided greater control (75% vs 31%) of Palmer amaranth than did the glyphosate system. These results indicate that a POST only herbicide weed management system did not provide sufficient control of Palmer amaranth, even when used in conjunction with cover crops that produced a moderate level of biomass. Therefore, future recommendations for GR Palmer amaranth control will include integrating cover crops with PRE herbicides, overlaying residual herbicides in-season, timely POST herbicide applications, and hand weeding in order to achieve season-long control of this pest.

scholarly journals Of mixtures in the system of fodder production of the Republic of Tatarstan

2018 ◽  
Vol 12 (4) ◽  
pp. 20-22 ◽  
Author(s):  
Рустем Мухамадиев ◽  
Rustem Mukhamadiev ◽  
Рустам Низамов ◽  
Rustam Nizamov ◽  
Марсель Маликов ◽  
...  
Keyword(s):  
Field Experiments ◽  
Climatic Conditions ◽  
Mineral Fertilizers ◽  
Forage Crops ◽  
Livestock Feeds ◽  
Fodder Production ◽  
Urgent Task ◽  
Fodder Crops ◽  
Annual Grasses ◽  
The Republic

Mixed crops of annual fodder crops are one of the main levers for balancing livestock feeds, at the same time increasing their productivity and quality remains an urgent task. In connection with these, from 2011 to 2013 years, we conducted field experiments with these crops. Thus, for the first time in the soil-climatic conditions of the Republic of Tatarstan, the following were studied at the research site: the effectiveness of applying calculated doses of mineral fertilizers to the planned yield of poly-species forage crops; quality and nutritional value of feed; dynamics of nutrition elements on strip crops of sunflower and annual grasses, depending on the nutrition background. According to the results of the research, it was found that the largest harvest of fodder units is achieved with the sowing scheme 180 + 180 cm (N85P35K35), the highest increment of dry matter is in the scheme 180 + 180 and 360 + 360 cm (N130P60K60), the maximum harvesting of crude protein for sunflower seeding and annual grasses with a width of strips of 180 cm (N130P60K60).

Compatibility of Diclofop and BAS 9052 with Bentazon

Weed Science ◽  
1982 ◽  
Vol 30 (5) ◽  
pp. 458-462 ◽  
Author(s):  
James R. Campbell ◽  
Donald Penner
Keyword(s):  
Glycine Max ◽  
Field Experiments ◽  
Field Studies ◽  
Propanoic Acid ◽  
Grain Yields ◽  
Emulsifiable Concentrate ◽  
Powder Formulation ◽  
Wettable Powder ◽  
Annual Grasses ◽  
Soybean Plants

BAS 9052 {2-[1-(ethoxyimino)-butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one} effectively controlled annual grasses in soybean [Glycine max(L.) Merr.] alone or in combination with bentazon [3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] in greenhouse and field experiments. The activity of diclofop {2-[4-(2,4-dichlorophenoxy)phenoxy] propanoic acid} on annual grasses was reduced if combined with bentazon in a tank mixture. The wettable powder formulation of bentazon, as well as a day temperature of 30 C, slightly reduced the antagonistic interaction from that of the emulsifiable concentrate formulation of bentazon or a day temperature of 15 C. In greenhouse studies ‘Corsoy’ soybean plants were injured by the diclofop-bentazon combination. In field studies, however, the injury was not sufficient to reduce grain yields.

Effects of Ultra-low Volume Application on Herbicide Efficacy Using Oil Diluents as Carriers

1995 ◽  
Vol 9 (4) ◽  
pp. 682-688 ◽  
Author(s):  
Daren R. Bohannan ◽  
Thomas N. Jordan
Keyword(s):  
Soybean Oil ◽  
Hydraulic System ◽  
Seed Oil ◽  
Field Experiments ◽  
Water Control ◽  
Annual Grasses ◽  
Water Field ◽  
Low Volume ◽  
Carrier Volume ◽  
Petroleum Oil

The efficacy of postemergence herbicide applications was evaluated in the greenhouse and the field in 1993 and 1994, using variables of carrier volume and diluent type. Ultra-low volume (ULV) applications of herbicides using an air-assisted sprayer calibrated at a volume of 9.4 L/ha were compared to 94 and 187 L/ha applications with a conventional hydraulic system. In greenhouse studies, reduced rates of sethoxydim, clethodim, fluazifop-P, and quizalofop were used to compare the effects of carrier types and volumes on their efficacy to yellow foxtail. All herbicides applied in oil diluents at 9.4 L/ha, with the exception of fluazifop-P and quizalofop applied in soybean oil, provided better yellow foxtail control than when applied in water at 94 and 187 L/ha. Sethoxydim and clethodim applied at 25 and 16% of the recommended rate, respectively, provided over 90% control in both petroleum oil and methylated seed oil. Reduced rates of glyphosate in petroleum oil or soybean oil were more effective at reducing bermudagrass growth than in water or methylated seed oil. Activity of glyphosate in methylated seed oil was no more effective than in water. Field experiments were conducted to study the efficacy of ULV applications of sethoxydim, clethodim, fluazifop-P, imazethapyr, and bentazon. Rates of the postemergence grass herbicides could be reduced by applying them at ULV in oil diluents while maintaining annual grass control equal to that achieved with higher herbicide rates in larger volumes of water. Control of annual grasses and annual broadleaf weeds with bentazon and imazethapyr applied at ULV were inconsistent and did not provide acceptable weed control. This may be partially due to the poor suspension of these herbicides in oil carriers.

scholarly journals Flumioxazin for Weed Control in Texas Peanuts (Arachis hypogaea L.)1

1996 ◽  
Vol 23 (1) ◽  
pp. 30-36 ◽  
Author(s):  
W. James Grichar ◽  
A. Edwin Colburn
Keyword(s):  
Weed Control ◽  
Arachis Hypogaea ◽  
Field Experiments ◽  
Early Season ◽  
Ipomoea Hederacea ◽  
Ipomoea Lacunosa ◽  
Arachis Hypogaea L ◽  
Pitted Morningglory ◽  
Annual Grasses ◽  
Herbicide Programs

Abstract Field experiments were conducted in 1991 and 1993 to evaluate flumioxazin alone and in various herbicide programs for weed control in peanut. Flumioxazin alone provided inconsistent control of annual grasses, while the addition of pendimethalin or trifluralin improved control considerably. Pitted morningglory (Ipomoea lacunosa L.) and ivyleaf morningglory [Ipomoea hederacea (L.) Jacq.] control was > 75% when flumioxazin was used alone. Flumioxazin caused early season peanut stunting with some recovery within 4 to 6 wk. Postemergence applications of imazethapyr or lactofen increased peanut stunting.

Dark Island heath (Ninety-mile plain, South Australia). VII. The effect of fertilizers on composition and growth, 1950-60

1963 ◽  
Vol 11 (1) ◽  
pp. 67 ◽  
Author(s):  
RL Specht
Keyword(s):  
Field Experiments ◽  
Harmful Effect ◽  
South Australia ◽  
Maximum Growth ◽  
Phosphate Fertilizer ◽  
Individual Species ◽  
Fertility Level ◽  
Vegetation Growth ◽  
Annual Grasses ◽  
Heath Community

Field experiments described in this paper analyse the effect of increase in soil fertility level on heath vegetation growing on the Makin sand. Fertilizers, P, N, Cu, and Zn, were added to raise the fertility of the plots to that of more fertile soils which, in coastal eastern and southern Australia, support a herbaceous understorey. Increased fertility did not affect germination of heath plants, but it influenced adversely the establishment of seedlings. Application of even small quantities of fertilizers (2 cwt superphosphate per acre, 2 cwt sodium nitrate per acre) greatly reduced the survival rate of all seedlings. Phosphorus fertilizer produced greatly increased growth in both surviving seedlings and mature heath plants; nitrogen together with phosphorus improved the growth of some species still further. There was great variation in the responses of individual species to fertilizers: some species showed maximum growth at 2 cwt superphosphate per acre, others at 4, others at 8 cwt per acre. The first group is dominant in the climax vegetation. Growth of the heath community was almost trebled by additions of 16 cwt superphosphate per acre. "Phosphorus toxicity" symptoms were observed in some mature heath species. Phosphate fertilizer hastened maturation and flowering in some heath seedlings which, after the addition of superphosphate, flowered some two years before the controls. This treatment also induced annual flowering a week or two earlier than on the control plots. Annual grasses, herbs, and a moss appeared and survived on all phosphorustreated plots, rarely in the unfertilized heath. Seeds of these annual species were windborne either from neighbouring farms five miles away or from adjacent plant communities. The results of these field experiments suggest that: (1) herbaceous species fail to survive on impoverished soils because of the low level of phosphorus which precludes satisfactory growth; (2) heath species are excluded from the more fertile soils firstly by some harmful effect on seedlings and secondly by competition from the more vigorous herbaceous plants in this environment. Gradually over the last 10 years heath plots fertilized with phosphorus fertilizers have shown changes towards a herbaceous sward.

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