Field Dodder (Cuscuta pentagona) Control with Flumioxazin

2017 ◽  
Vol 31 (6) ◽  
pp. 847-851
Author(s):  
Rick A. Boydston ◽  
Treva L. Anderson
Keyword(s):  
Herbicide Application ◽  
Forage Crops ◽  
Sand Soil ◽  
Treated Soil ◽  
Stringent Control ◽  
Loamy Sand Soil ◽  
Alfalfa Field ◽  
Alfalfa Seed ◽  
Unknown Control ◽  
Cuscuta Pentagona

Field dodder is an important weed in alfalfa grown for seed, and stringent control is required to keep the alfalfa seed from becoming contaminated with dodder seed. Pendimethalin has been the primary tool used to control dodder in alfalfa seed production for more than 25 yr. Flumioxazin was recently registered in alfalfa seed and forage crops, but its activity on field dodder was unknown. Control of field dodder with flumioxazin and pendimethalin was compared in greenhouse trials in a loamy sand soil. The number of emerged dodder seedlings able to twine on a simulated host were counted weekly for a 4-wk period following herbicide application. Flumioxazin applied at the alfalfa field use rate of 0.14 kg ai ha−1completely controlled dodder over the initial 4-wk period. Dodder either failed to emerge or emerged and died without twining on the simulated host in the 4-wk period. When dodder was reseeded after 4 wk in flumioxazin-treated soil, the number of twined dodder seedlings was reduced by 56% in one trial but was unaffected in a second trial compared with nontreated checks. In the initial 4-wk period following herbicide application, flumioxazin controlled field dodder similar to pendimethalin applied at 2.2 and 4.4 kg ai ha−1in both trials. However, after additional dodder seed was planted at 4 wk after treatment, dodder was suppressed more by pendimethalin than flumioxazin in the additional 4-wk period. Flumioxazin offers alfalfa seed and forage producers a new mode of action to manage early-emerging field dodder.

Existence and Decontamination of HVC, Infectious Enteric Bacteria and Parasites in Sewaged Soils

2014 ◽  
Vol 3 (1) ◽  
pp. 150-158 ◽  
Author(s):  
Mohey A. Hassanain ◽  
Nawal A. Hassanain ◽  
Esam A. Hobballa ◽  
Fatma H. Abd- El Zaher ◽  
Mohamed Saber M. Saber
Keyword(s):  
Soil Sample ◽  
Potassium Permanganate ◽  
Enteric Bacteria ◽  
Sewage Effluent ◽  
Calcium Hypochlorite ◽  
Sand Soil ◽  
E Coli ◽  
Surface Sample ◽  
Loamy Sand Soil ◽  
Sewage Farm

A surface sample representing a high contaminated loamy sand soil irrigated with sewage effluent since 30 years and was cultivated with artichoke was collected from Abu-Rawash sewage farm. The existence of HVC, enteric infectious bacteria and parasites in sewaged soil found to be negative for the forward and positive for the latter's. Out of the 30 samples separated from the sewaged soil sample, only 3 samples contained parasitic fauna of developed and undeveloped Ascaris (10%) and five samples contained Entamoeba coli. Results showed that the number of Ascaris eggs/gm soil was 0.017 and the number of E. coli/gm was 0.26. Decontamination of soil parasites was effective using either calcium hypochlorite or potassium permanganate. Salmonella, Vibrio and Campelobacter were detected in the high contaminated sewaged soil and survived for 120 days in the sewaged soil under all control and bioremediated treatments irrigated with either sewage effluent or water.

Effect of herbicides on the weed infestation and grain yield of soybean (Glycine max)

2004 ◽  
Vol 52 (2) ◽  
pp. 199-203 ◽  
Author(s):  
G. Singh ◽  
R. S. Jolly
Keyword(s):  
Glycine Max ◽  
Grain Yield ◽  
Weed Control ◽  
Negative Correlation ◽  
Rainy Season ◽  
Dry Matter ◽  
Field Experiments ◽  
Sand Soil ◽  
Loamy Sand Soil ◽  
Weed Infestation

Two field experiments were conducted during the kharif (rainy) season of 1999 and 2000 on a loamy sand soil to study the effect of various pre- and post-emergence herbicides on the weed infestation and grain yield of soybean. The presence of weeds in the weedy control plots resulted in 58.8 and 58.1% reduction in the grain yield in the two years compared to two hand weedings (HW) at 30 and 45 days after sowing (DAS), which gave grain yields of 1326 and 2029 kg ha-1. None of the herbicides was significantly superior to the two hand weedings treatment in influencing the grain yield. However, the pre-emergence application of 0.75 kg ha-1 S-metolachlor, and 0.5 kg ha-1 pendimethalin (pre-emergence) + HW 30 DAS were at par or numerically superior to this treatment. There was a good negative correlation between the weed dry matter at harvest and the grain yield of soybean, which showed that effective weed control is necessary for obtaining higher yields of soybean.

scholarly journals Effect of Macro- and Nano-Biosolid Fractions on Sorption Affinity and Transport of Pb in a Loamy Sand Soil

2019 ◽  
Vol 11 (12) ◽  
pp. 3460 ◽  
Author(s):  
Abdulaziz G. Alghamdi ◽  
Hesham M. Ibrahim
Keyword(s):  
Surface Area ◽  
Land Application ◽  
Surface Reactivity ◽  
Loamy Sand ◽  
Field Scale ◽  
Sand Soil ◽  
Loamy Sand Soil ◽  
Fraction Size ◽  
Potential Impact ◽  
Potential Mobility

Applications of large amounts of biosolid to agricultural lands have raised the concern over its potential impact on co-transport of metal contaminants. In this study, bulk biosolid was fractioned into six macro- and nano-biosolid fraction sizes. We investigated variations in the physicochemical properties of the different biosolid fraction sizes, and assessed sorption affinity and transport of Pb in a loamy sand soil. Decreasing biosolid fraction size from macro to nano resulted in consistent increases in surface area, surface charge, and a decrease in pore size. Biosolid particles >1000 µm showed similar surface properties that differ from biosolid particles < 1000 µm. Sorption affinity for Pb was larger on nano-biosolid as compared to all macro-biosolid fraction sizes. This is mainly attributed to the larger surface area and zeta potential of nano-biosolid, leading to increased surface reactivity and greater stability. Total amount eluted of Pb was increased in the presence of macro- and nano-biosolid by 21.3% and 45.6%, respectively. Our findings suggest that the application of the >1000 µm biosolid fractions can help to minimize adverse effects of biosolid applied in areas susceptible to potential environmental risk of contamination by heavy metals. Further assessment of potential mobility of nano-biosolid at the field scale is needed before the recommendation of including such approach during land application of biosolid.

scholarly journals Influence of Tobacco Plant on Macronutrient Levels in Sandy Soils

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 418 ◽  
Author(s):  
Jacob Lisuma ◽  
Ernest Mbega ◽  
Patrick Ndakidemi
Keyword(s):  
Tobacco Plant ◽  
Sandy Soils ◽  
Soil N ◽  
Sand Soil ◽  
Calcium Ammonium Nitrate ◽  
Loamy Sand Soil ◽  
Nicotiana Tabacum L ◽  
Before And After ◽  
Tobacco Cultivation ◽  
Nitrogen Phosphorus

Tobacco (Nicotiana tabacum L.) is associated with great uptake of soil macronutrients. Following the need to understand the macronutrients levels before and after tobacco cultivation, research was conducted in loamy sand soil of Sikonge, Urambo, and sand soil of Tabora, Tanzania. The initial macronutrients levels in the soil were compared with those measured after unfertilized and fertilized tobacco. Results showed that unfertilized tobacco plant influences the increase of nicotine to the rhizosphere, the macronutrients Ca (135%) > N (25%), decrease in the order of S (81%) > P (49%) > Mg (12%) > K (11%). The sole effect of nitrogen–phosphorus–potassium (NPK) and calcium–ammonium–nitrate (CAN) 27% fertilizers increased further nicotine, Ca (25%) > N (20%) > S (8%) > Mg (4%) > P (3%), and decreased K (3%) in the rhizosphere. Both tobacco plant and NPK + CAN fertilizers on the rhizosphere increased Ca (193%) > N (50%) and decreased S (80%) > P (48%) > K (14%) > Mg (8%). Leaf concentrations in fertilized tobacco increased Ca (197%) > K (28%) > P (27%) > S (26%) > N (18%) > Mg (12%). Therefore, tobacco plant increases soil N and Ca but decreases P, K, Mg, and S.

A Study of Compaction and Crop Yields in Loamy Sand Soil After Seven Years of Reduced Tillage

1986 ◽  
Vol 29 (2) ◽  
pp. 0389-0392 ◽  
Author(s):  
Jonathan Chaplin ◽  
Mike Lueders ◽  
David Rugg
Keyword(s):  
Crop Yields ◽  
Loamy Sand ◽  
Reduced Tillage ◽  
Sand Soil ◽  
Loamy Sand Soil

Controlled Release Starch Granule Formulations Reduce Herbicide Leaching in Soil Columns

1992 ◽  
Vol 6 (2) ◽  
pp. 317-321 ◽  
Author(s):  
Rick A. Boydston
Keyword(s):  
Controlled Release ◽  
Starch Granule ◽  
Soil Column ◽  
Loamy Sand ◽  
Starch Granules ◽  
Soil Columns ◽  
Sand Soil ◽  
Water Dispersible ◽  
Loamy Sand Soil ◽  
Water Dispersible Granule

Experimental controlled release starch granules (CRSG) containing 5.3% a.i. (w/w) norflurazon or 6% a.i. (w/w) simazine retarded the leaching of both herbicides in loamy sand soil columns when compared to commercial formulations of norflurazon [80% (w/w) dry flowable] or simazine [90% (w/w) water dispersible granule]. Barley bioassays indicated norflurazon and simazine remained in the surface 0 to 2.5 cm of soil when applied as CRSG formulations and moved to a depth of 15 cm when applied as commercial dry formulations and leached with 6 cm of water. CRSG placed on pre-wetted soil columns began to release norflurazon by 7 d at 25 C or 14 d at 15 C, and subsequent leaching moved norflurazon beyond the top 2.5 cm of the soil column.

scholarly journals Inoculation and Soil Texture Effects on Yield and Yield Components of Mungbean

2018 ◽  
Vol 10 (9) ◽  
pp. 6 ◽  
Author(s):  
Andre A. Diatta ◽  
Wade E. Thomason ◽  
Ozzie Abaye ◽  
Larry J. Vaughan ◽  
Thomas L. Thompson ◽  
...  
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Soil Texture ◽  
Loamy Sand ◽  
Plant Residue ◽  
Silt Loam ◽  
Sand Soil ◽  
Loamy Sand Soil ◽  
Group I ◽  
Number Of Seeds

Mungbean [Vigna radiata (L.) Wilczek] is a short-duration and relatively drought-tolerant crop grown predominantly in the tropics. This grain legume can improve soil fertility through biological nitrogen (N) fixation. To assess the effects of Bradyrhizobium (group I) inoculation on yield and yield attributes of mungbean, a greenhouse study was conducted during Fall 2016 with two mungbean cultivars (‘Berken’ and ‘OK2000’), two inoculum treatments (inoculated and uninoculated), and two soil textures (loamy sand and silt loam). Pots were laid out in a completely randomized design and treatment combinations were replicated seven times. The main effects of cultivar and soil texture significantly (P ≤ 0.05) affected mungbean seed weight and plant residue mass. Seed yield (13%), plant residue (22%), and protein content (6%) of OK2000 were significantly higher than Berken cultivar. A 31% seed yield and 40% plant residue increase were recorded on silt loam soil compared to loamy sand soil. Significant increase in plant height (18%) and number of pods per plant (21%) were also recorded when mungbean plants were grown on silt loam compared to loamy sand soil. Bradyrhizobium inoculation significantly increased the number of pods per plant, the number of seeds per plant, and seed yield. [Cultivar × inoculation] and [cultivar × soil texture] interactions had significant (P ≤ 0.05) effects on number of seeds per pods and plant height, respectively. Understanding the agronomic practices and soil physical properties that may limit mungbean production could help in optimizing its establishment and growth in non-traditional growing areas.

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