scholarly journals The influence of strip cropping and weed control methods on weed diversity in dent maize (Zea mays L.), narrow-leafed lupin (Lupinus angustifolius L.) and oats (Avena sativa L.)

2014 ◽  
Vol 66 (4) ◽  
pp. 185-194 ◽  
Author(s):  
Aleksandra Głowacka
Keyword(s):  
Weed Control ◽  
Control Method ◽  
Chenopodium Album ◽  
Dry Weight ◽  
Weed Species ◽  
Two Factors ◽  
Weed Diversity ◽  
Sole Cropping ◽  
Weed Infestation ◽  
The Subject

The experiment was conducted in 2008–2010 at the Experimental Station of the Faculty of Agricultural Sciences in Zamość, University of Life Sciences in Lublin. The research design included two factors: I. Method of cultivation – sole cropping and strip cropping (the cultivation of three plants: maize, narrow-leafed lupin and oats, in neighboring strips); II. Weed control method – mechanical and chemical. The subject of this study was weed infestation in maize, narrow-leafed lupin and oats. The greatest diversity of weeds was found in the narrow-leafed lupine crop, while the lowest diversity in maize. The dominant weed species in maize, lupine and oats were <em>Echinochloa crus-galli</em>, <em>Chenopodium album </em>and <em>Galinsoga parviflora </em>which ranged from 34% to 99% of the total number of weeds. Strip cropping clearly reduced the number of weeds per unit area in the narrow-leafed lupin and oat crops as well as the aboveground dry weight of weeds in all plant species. Chemical weed control significantly decreased both the number and weight of weeds in comparison with the mechanical method.

scholarly journals The influence of strip cropping on the state and degree of weed infestation in dent maize (Zea mays L.), common bean (Phaseolus vulgaris L.), and spring barley (Hordeum vulgare L.)

2013 ◽  
Vol 66 (1) ◽  
pp. 135-148 ◽  
Author(s):  
Aleksandra Głowacka
Keyword(s):  
Common Bean ◽  
Weed Control ◽  
Control Method ◽  
Spring Barley ◽  
Chenopodium Album ◽  
Dry Weight ◽  
Weed Species ◽  
Hordeum Vulgare L ◽  
Sole Cropping ◽  
Weed Infestation

The experiment was conducted in the years 2008–2010 at the Experimental Station of the Faculty of Agricultural Sciences in Zamość, University of Life Sciences in Lublin. The following factors were analysed in the experiment: I. Cultivation method – sole cropping and strip cropping, which consisted in the cultivation of three plants: dent maize, common bean, and spring barley, in adjacent strips with a width of 3.3 m; II. Weed control methods – mechanical and chemical. The subject of the research was weed infestation of the 'Celio' variety of dent maize, the 'Aura' variety of common bean, and the 'Start' variety of spring barley. Weed infestation of the crops was assessed two weeks before harvesting by determining the species composi- tion as well as the number and dry weight of weeds. The dominant weed species in maize, common bean and spring barley were <em>Echinochloa crus-galli, Chenopodium album </em>and <em>Galinsoga parviflora</em>, constituting from 58% to 70% of the total number of weeds. Strip cropping clearly reduced the number of weeds per unit area in all the cultivated species and dry weight of aboveground parts produced by them in common bean and maize crops. The limiting effect of strip cropping on the weed infestation parameters was particularly clear in combination with the mechanical weed control method.

scholarly journals Changes in weed infestation of common bean (Phaseolus vulgaris L.) under conditions of strip intercropping and different weed control methods

2012 ◽  
Vol 63 (2) ◽  
pp. 171-178 ◽  
Author(s):  
Aleksandra Głowacka
Keyword(s):  
Common Bean ◽  
Weed Control ◽  
Chenopodium Album ◽  
Floristic Composition ◽  
Dry Weight ◽  
Amaranthus Retroflexus ◽  
Weed Species ◽  
Aerial Parts ◽  
Weed Infestation ◽  
Strip Intercropping

The experiment was conducted in the years 2004-2006 in a private farm in the village of Frankamionka in Zamość district. There were two experimental factors: I. Cultivation methods - sole cropping and strip intercropping; and II. Tending methods - mechanical, mechanical-chemical, and chemical weed control. The subject of the study was weed infestation of the Mela variety of common bean. Beans were sown between 30 April and 5 May. Weed infestation was assessed in the last week before harvesting by determining its floristic composition and the frequency of occurrence of particular weed species, as well as the air-dry weight of weeds. The dominant weed species were <i>Galinsoga parviflora</i>, <i>Echinochloa crus-galli</i>, <i>Chenopodium album</i>, and <i>Amaranthus retroflexus</i>, which comprised 84.7% of the total number of weeds. Strip intercropping markedly reduced the number of weeds per unit area (by 50%), as well as the dry weight of their aerial parts. The most effective method of weed control was the mechanical-chemical method, which resulted in the lowest occurrence of weeds. It also significantly reduced the weight of weeds.

scholarly journals Dominant weeds in maize (Zea mays L.) cultivation and their competitiveness under conditions of various methods of weed control

2012 ◽  
Vol 64 (2) ◽  
pp. 119-126 ◽  
Author(s):  
Aleksandra Głowacka
Keyword(s):  
Weed Control ◽  
Chenopodium Album ◽  
Dry Weight ◽  
Magnesium Content ◽  
Cirsium Arvense ◽  
Available Phosphorus ◽  
Research Station ◽  
Weed Species ◽  
Maize Crop ◽  
Calcium And Magnesium

A field experiment was conducted in the years 2008-2010 at the Research Station of the Faculty of Agricultural Sciences, University of Life Sciences in Lublin, on brown soil with a slightly acidic pH, a high content of available phosphorus and potassium as well as an average magnesium content. The experiment was set up in a random split-plot design with four replications, with two methods for controlling weed infestation: I. mechanical - weeding of inter-rows twice; II. chemical - the herbicide Afalon Dyspersyjny 450 SC (a.i. linuron, 900 g × ha<sup>-1</sup>). Next, potassium, calcium and magnesium contents were determined in maize and in the dominant weed species. Based on the dry weight yield of maize and the biomass of particular weed species, nutrient uptake per hectare area was calculated. The chemical method of weed control reduced both the number and dry weight of weeds more than the mechanical method. The dominant species in the maize crop were <i>Echinochloa crus-galli</i> (L.) P. Beauv., <i>Chenopodium album</i> L., <i>Galinsoga parviflora</i> Cav., and <i>Cirsium arvense</i> L. All the weed species examined were more competitive than maize in accumulating potassium, calcium and magnesium. <i>Galinsoga parviflora</i> Cav. was the most competitive species with maize for potassium, <i>Cirsium arvense</i> L. for calcium, and <i>Chenopodium album</i> L. and <i>Polygonum lapathifolium</i> L. subsp. <i>lapathifolium</i> for magnesium. Weeds are serious competitors in taking up nutrients relative to crop plants; their share in the total uptake of macroelements from the soil by the maize crop and weeds together was considerable and it averaged as follows: for K - 35%, Ca - 27.3%, Mg - 27.4%.

scholarly journals The effect of different agrotechnical levels on weed infestation in crops of naked and husked varieties of oat (Avena sativa L.)

2012 ◽  
Vol 63 (2) ◽  
pp. 207-213
Author(s):  
Sylwia Andruszczak ◽  
Ewa Kwiecińska-Poppe ◽  
Piotr Kraska ◽  
Edward Pałys
Keyword(s):  
Weed Control ◽  
Chenopodium Album ◽  
Control Object ◽  
Dry Weight ◽  
Stellaria Media ◽  
Polygonum Aviculare ◽  
Weed Infestation ◽  
Oat Cultivars ◽  
The City ◽  
Mechanical Weed Control

The present study was carried out in the period 2007- 2009 in the Experimental Farm in Bezek near the city of Chełm. The aim of the investigation was to compare weed infestation of the husked (Krezus) and naked (Cacko) oat cultivars cultivated under conditions of different weed control treatments. The following weed control levels were compared: A - control object; B - harrowing twice; C - application of the herbicide Mustang 306 SE; D - herbicide Mustang 306 SE + foliar fertilizer Insol 3; E - herbicide Mustang 306 SE + two foliar fertilizers: Insol 3 and FoliCare 18:18:18. The husked oat cv. Krezus was more competitive against weeds. Number of dicotyledonous weeds and of monocotyledonous weeds, total weeds, and air-dry weight of above-ground parts of weeds in the crop of this cultivar were all significantly lower compared to the naked cv. Cacko. From the group of dicotyledonous species, <i>Chenopodium album</i>, <i>Galinsoga parviflora</i>, <i>Matricaria maritima</i> ssp. <i>inodora</i>, <i>Polygonum aviculare</i>, and <i>Stellaria media</i> were the dominant species in the crops of the oat varieties under investigation, whereas among the monocotyledonous species <i>Echinochloa crus-galli</i>, <i>Setaria pumila</i>, <i>Apera spica-venti</i>, and <i>Elymus repens</i> occurred in greatest numbers. The application of the herbicide Mustang 306 SE decreased the number of dicotyledonous weeds and air-dry weight of weeds, compared to the treatment in which mechanical weed control had been used.

scholarly journals Grain sorghum productivity depending on herbicide application

2020 ◽  
Vol 202 (11) ◽  
pp. 14-20
Author(s):  
Ol'ga Kurdyukova ◽  
A. Baranovskiy
Keyword(s):  
Weed Control ◽  
Chenopodium Album ◽  
Dry Weight ◽  
Steppe Zone ◽  
Grain Sorghum ◽  
Amaranthus Retroflexus ◽  
Ambrosia Artemisiifolia ◽  
Control Measures ◽  
Growing Period ◽  
Weed Infestation

Abstract. The purpose of the work is to establish the effectiveness of weed in control in crops of grain sorghum with herbicides of soil and leaf action. Scientific novelty. For the first time in sorghum crops for weed control, effective combinations of soil and leaf herbicides have been identified. Methods. Experiments were carried out on the black soils of steppe zone Ukraine. Research methods are generally accepted. The control options were herbicide-free and weed-free. Results. At tillering stage the number of weeds in sorghum crops reached 141 pieces/m2 and their air-dry weight was 218 g/m2. Green amaranth (Amaranthus retroflexus), fat hen (Chenopodium album), field mustard (Sinapis arvensis), ragweed ragweed (Ambrosia artemisiifolia), barnyard grass (Echinochloa crus-galli), bristlegrass (Setaria viridis) were dominant in the crops. The use of foliar-applied herbicides such as Agritox (1 l/ha), Ballerina (0.4 l/ha), Dialen Super (0.7 l/ha) in the stage of three-five leaves and a pre sowing soil-applied herbicide Primextra Gold (3 l/ha) ensured the maximum reduction of weed infestation of grain sorghum crops. The number of weeds with the use of these herbicides decreased by 10.4–19.7 times, and their weight decreased by 4.1–4.8 times in comparison with the options without the use of weed control measures. The conditions for plant growth and development were improved due to the reduction of weed infestation of grain sorghum crops. The growing period of the crop reduced from 125 to 114 days, the height of plants increased by 19–21 cm and their weight increased by 2.7–2.8 times. The sorghum grain yield reached 6.32–6.34 t/ha, which was higher than with the options without the use of weed control measures by 4.01–4.30 t/ha or 3.0–3.1 times. The same results were obtained in production conditions.

scholarly journals The main weed species and their control in oilseed crops in Finland

2008 ◽  
Vol 20 (3) ◽  
pp. 262 ◽  
Author(s):  
J. SALONEN ◽  
P. LAITINEN ◽  
M. SAASTAMOINEN
Keyword(s):  
Weed Control ◽  
Chenopodium Album ◽  
Good Control ◽  
Visual Observation ◽  
Human Consumption ◽  
Weed Species ◽  
Oilseed Crops ◽  
Yield Level ◽  
Weed Infestation ◽  
Sonchus Arvensis

A survey of weeds in spring-sown oilseed crops (Brassica rapa ssp. oleifera and Brassica napus ssp. oleifera) was conducted in southern and central Finland during 2007–2009, representing the first such extensive investigation in the country. The occurrence of the most abundant weed species in oilseeds was surveyed in 429 fields. In the fields with moderate or high weed infestation, 1–6 harmful weed species were recorded by visual observation according to their biomass production. About 40 weed species were recorded, the most predominant being Chenopodium album, Galeopsis spp., Galium spurium, Sonchus arvensis and Tripleurospermum inodorum. Elymus repens was the only major grass weed. Chemical weed control of broad-leaved weeds had been practised in 53% of the fields, resulting in relatively good control. In addition, both selective graminicides and glyphosate were used to control E. repens. Mechanical weed control was not practised in any field. The crop yield level was about 300 kg ha-1 higher in the fields with low weed infestation compared with in the highly infested fields. New promising options to replace the banned herbicide trifluralin are available. Thus, the most harmful weeds, such as C. album, which interferes with the production of high-quality oil for human consumption, can still be effectively controlled.;

scholarly journals Weed infestation of soybean (Glycine max L. Merr.) under different tillage systems

2015 ◽  
Vol 68 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Dorota Gawęda ◽  
Rafał Cierpiała ◽  
Elżbieta Harasim ◽  
Marian Wesołowski ◽  
Karol Bujak
Keyword(s):  
Crop Yields ◽  
Chenopodium Album ◽  
Dry Weight ◽  
No Tillage ◽  
Weed Species ◽  
Tillage Systems ◽  
Sowing Time ◽  
Soybean Cultivars ◽  
Weed Infestation ◽  
Direct Drilling

Direct drilling is one of the methods to reduce tillage costs. Low labor intensity of this system also makes it possible to grow crops in locations where it is a problem to maintain optimal sowing time. However, the use of no-tillage can cause increased weed infestation of crop plants and as a consequence a decline in crop yields. The present study investigated the effect of two tillage systems, plough tillage and direct drilling, on the species composition, density and air-dry weight of weeds in crops of two soybean cultivars (‘Aldana’ and ‘Augusta’). A three-year field experiment was set up on loess-derived gray-brown podzolic soil. The study showed that the use of direct drilling for soybean cropping resulted in a significant increase in the density and dry weight of weeds relative to plough tillage. The study also found richer floristic composition of weeds and an increase in the numbers of dominant species under no-tillage conditions. <em>Elymus repens</em>, <em>Echinochloa crus-galli</em> and <em>Chenopodium album</em> were dominant weed species in all experimental treatments. <em>Chenopodium album</em> and <em>Galinsoga parviflora</em> were characterized by the highest constancy (constancy classes V and IV) in crops of both soybean cultivars, whereas <em>Echinochloa crus-galli</em> showed the highest constancy value in the ‘Aldana’ crop. Under direct drilling, most weed species were found to exhibit higher constancy compared to plough tillage.

Economic Comparison of Mechanical and Chemical Weed Control

Weed Science ◽  
1968 ◽  
Vol 16 (3) ◽  
pp. 369-371 ◽  
Author(s):  
David L. Armstrong ◽  
J. K. Leasure ◽  
Mitchell R. Corbin
Keyword(s):  
Weed Control ◽  
Control Method ◽  
Economic Feasibility ◽  
Control Methods ◽  
Net Income ◽  
Small Item ◽  
Mechanical Methods ◽  
Two Factors ◽  
Complex Decision ◽  
Selection Of

The problem in determining the economic feasibility of mechanical, chemical, and combination weed control methods in corn (Zea mays L.) is a complex decision involving many factors. The effects of cost, yield, timeliness, and alternative uses of labor are the factors considered in comparing various methods of weed control in this study. Costs of weed control operations range from $2.84/A for two cultivations to $10.45/A for the most intensive, mechanical-chemical operation studied. Most common weed control methods have costs of approximately $3 to $4/A. Yields range from 83 bu/A for two cultivations to 96 bu/A with the highest cost chemical-mechanical weed control methods. All yields used in this study are supported by agronomic studies and are indexed on the basis of 100 bu/A for weed-free conditions. The consideration of both yields and costs does affect the selection of a weed control method. Considering only these two factors, mechanical methods have a slight advantage over chemical weed control methods. Penalizing mechanical methods because of delay or timeliness characteristics gives chemical methods an advantage by as much as $3.00/A. Alternative uses of labor, even though a common argument in selecting chemical or mechanical methods, is a very small item and has only moderate effects on the changes in net income.

The effects of weed density and different weed control applications on yield and yield components of chickpea cultivars

2019 ◽  
Author(s):  
Melih Yilar Omer Sozen ◽  
Ufuk Karadavut
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Yield Components ◽  
Control Method ◽  
Herbicide Application ◽  
Weed Species ◽  
Control Applications ◽  
Weed Density ◽  
Yield And Yield Components ◽  
Plot Design

This study was conducted to determine the effects of weed density and different weed control treatments on chickpea yield and yield components. The experiment was carried out in split plot design with 3 replications in experimental fields of Kirsehir Ahi Evran University during 2016 and 2017 crop seasons. Total nine treatments (no weed control, permanent weed control, one-time hoeing, two-time hoeing, three-time hoeing, herbicide application after emergence, one-time hoeing with herbicide application, two-time hoeing with herbicide application and three-time hoeing with herbicide application) were compared to know the most effective weed control method. Vaccaria pyramidata Medik., Sinapis arvensis L., Acroptilon repens L. weed species were found to be the most intense in the experimental area. All weed control applications had significant effect on chickpea yield and yield components compared to weedy plots. Three-time hoeing with herbicide application increased the yield by 361.55-478.50% compared to weedy plots. Likewise, three-time hoeing application even increased the yield by 348.50-357.09% compared to weedy plots. The results revealed that three-time hoeing with herbicide and three-time hoeing applications stood out in weed management to obtain a good yield in chickpea cultivation at Kirsehir province.

scholarly journals MANAGEMENT OF RED RICE (ORYZA SATIVA) AND BARNYARDGRASS (ECHINOCHLOA CRUS-GALLI) GROWN WITH SORGHUM WITH REDUCED RATE OF ATRAZINE AND MECHANICAL METHODS

2012 ◽  
Vol 48 (4) ◽  
pp. 587-596 ◽  
Author(s):  
ANDRÉ ANDRES ◽  
GERMANI CONCENÇO ◽  
GIOVANI THEISEN ◽  
LEANDRO GALON ◽  
FRANCO TESIO
Keyword(s):  
Oryza Sativa ◽  
Weed Control ◽  
Control Method ◽  
Application Rate ◽  
Soil Tillage ◽  
Weedy Rice ◽  
Red Rice ◽  
Weed Species ◽  
Mechanical Methods ◽  
Tillage System

SUMMARYThe weedy variety ofOryza sativaoccurs in several rice cultivation areas reducing both grain yield and quality. Prevention and crop rotation are considered the basic means to reduce its presence. Weed control in sorghum is generally attained with atrazine. In this study, the efficacy of both chemical and mechanical methods for control, under different soil tillage conditions, of weedy rice and barnyardgrass during sorghum cultivation was evaluated with the aim to reduce the application rate of atrazine. In the case of chemical control, the atrazine rate (1000, 1500, 2000, 2500 and 3000 ga.i.ha−1) and application timing (pre- and post-emergence) were assessed. With the mechanical control method, the number of interventions (inter-row hoeing with sorghum at 3, 4–5 and 6–8 leaves) to avoid weed competition was determined. The effect of the tillage system on weed population was investigated comparing conventional (ploughing), minimum-tillage (disc harrowing) and sod seeding (no-tillage) in combination with pre- and post-emergence herbicide treatments. The results showed that efficient control of weedy rice and barnyardgrass was achieved in lowlands with sorghum in rotation with rice. Both chemical and mechanical methods of weed control in sorghum gave a level of efficiency higher than 60%. The application of atrazine was more efficient in pre-emergence application, rather than in post-emergence treatments, in all soil tillage systems tested. On both weed species, the most suitable application rate was the pre-emergence treatment with 1500 ga.i.ha−1, and the adoption of higher rates did not significantly increase the herbicidal efficacy. The adoption of two or three mechanical interventions resulted in sorghum yield higher than the chemical post-emergence application, and similar to the application of atrazine in pre-emergence. Higher yield results were in accordance to greater weed control, being obtained in the conventional tillage system.

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