UPTAKE AND DISSIPATION OF TRIALLATE AND TRIFLURALIN VAPORS BY WHEAT UNDER FIELD CONDITIONS

1988 ◽  
Vol 68 (4) ◽  
pp. 1153-1157 ◽  
Author(s):  
A. J. CESSNA ◽  
R. GROVER ◽  
A. E. SMITH ◽  
J. H. HUNTER
Keyword(s):  
Triticum Aestivum ◽  
Growing Season ◽  
Triticum Aestivum L ◽  
Field Conditions ◽  
Treated Soil ◽  
Leaf Stage

The uptake and dissipation of triallate and trifluralin in the shoots of wheat (Triticum aestivum L.) grown in treated soil were monitored over a growing season. Maximum concentrations of both herbicides, detected at the four-leaf stage of the wheat, were 35.2 ± 5.8 and 10.5 ± 1.4 μg kg−1 for triallate and trifluralin, respectively. Residues had decreased by the six-leaf stage and then, because of continuous uptake of vapor by the crop, remained essentially constant through to heading. Maximum amounts of both herbicides, on a milligram per hectare basis, were detected in the aboveground portions of the crop at heading and were in the order of 0.01% of the amounts applied to the soil. No residues of either herbicide were detected in the mature grain.Key words: Triallate, trifluralin, vapor, uptake, wheat, residues

scholarly journals Physiological and Biochemical Response of Winter Wheat (Triticum Aestivum L.) to Ambient O3 and the Antiozonant Chemical Ethylenediurea (EDU) in Jeddah, Saudi Arabia

2018 ◽  
Vol 11 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Laila A. Baqasi ◽  
Huda A. Qari ◽  
Ibrahim A. Hassan
Keyword(s):  
Triticum Aestivum ◽  
Stomatal Conductance ◽  
Growth Yield ◽  
Growing Season ◽  
Triticum Aestivum L ◽  
Field Conditions ◽  
Growth And Yield ◽  
Photosynthetic Rates ◽  
Promising Tool ◽  
Physiological And Biochemical

This study was to conducted to investigate the use of ethylenediurea (EDU) as a possible tool to evaluate O3 effects on wheat (Triticum aestivum L.) plants under field conditions in Jeddah. Wheat plants were expsoed to ambient O3 (AA) and the antiozonant chemical ethylenediurea (EDU) in closed fumigation chambers for the full growing season. Growth, yield and physiology were determined in response to O3 and/or EDU. EDU-treated plants had higher photosynthetic rates (24%) and stomatal conductance (25%), which were reflected in higher growth and yield in terms of number of grains. The present study revealed that EDU could be used as a promising tool to mitigate damaging effects of O3 on under field conditions. EDU protected wheat plants leading to increases in photosynthetic rates, growth and yield.

scholarly journals SUNFLOWER COMPETITION IN WHEAT

1984 ◽  
Vol 64 (1) ◽  
pp. 105-111 ◽  
Author(s):  
GREG R. GILLESPIE ◽  
STEPHEN D. MILLER
Keyword(s):  
Triticum Aestivum ◽  
Helianthus Annuus ◽  
Flag Leaf ◽  
Wheat Yield ◽  
Triticum Aestivum L ◽  
Wheat Crop ◽  
Upper Midwest ◽  
Leaf Stage ◽  
Seeding Date ◽  
Field Season

Sunflower (Helianthus annuus L.) is grown in rotation with wheat (Triticum aestivum L.) in the upper midwest of the U.S.A. However, volunteer sunflower is often a problem in wheat planted the year following sunflower. Wheat yields as influenced by wheat seeding date and sunflower density, duration of sunflower competition and rate of sunflower control were determined in the field. Season-long sunflower competition at densities of 3, 9, and 23 plants per square metre reduced yield of the following wheat crop by an average of 11, 19, and 33%, respectively, averaged over seeding date and location. Sunflower was more competitive with wheat seeded in late than in early May, particularly at the lower sunflower densities. Wheat yield was reduced 22% when 24 sunflower plants/m2 were allowed to compete until the wheat flag-leaf stage. Wheat yields obtained were similar when volunteer sunflower was controlled by postemergence MCPA [[(4-chloro-o-tolyl)oxy] acetic acid], bromoxynil (3,5-dibromo-4-hydroxybenzonitrile), or bromoxynil plus MCPA despite the slower rate of control with MCPA compared to bromoxynil or bromoxynil plus MCPA. This research indicates that wheat following sunflower should be planted early and sunflower densities of nine plants per square metre or higher should be removed before the flag-leaf stage to prevent yield reductions.Key words: Density, duration, bromoxynil, MCPA, Helianthus annuus, Triticum aestivum

EFFECT OF SEA CROP 16 AND ERGOSTIM ON CROP YIELDS AND PLANT COMPOSITION

1982 ◽  
Vol 62 (3) ◽  
pp. 527-532 ◽  
Author(s):  
UMESH C. GUPTA ◽  
J. A. MacLEOD
Keyword(s):  
Triticum Aestivum ◽  
Pisum Sativum ◽  
Medicago Sativa ◽  
Crop Yields ◽  
Triticum Aestivum L ◽  
Field Conditions ◽  
Plant Composition ◽  
Greenhouse Study ◽  
Pisum Sativum L ◽  
Medicago Sativa L

Experiments were conducted to determine the effect of Sea Crop (SC 16) and Ergostim on the yield and nutrient composition of a few crops. Studies conducted under greenhouse and field conditions showed that the yields of wheat (Triticum aestivum L.) and peas (Pisum sativum L.) were not affected by the addition of SC16. The nitrogen (N) and sulfur (S) concentrations of the two crops were not affected by SC 16, except in the control and SC 16 treatment only where the increases were likely due to a concentration effect, since these two treatments had lower yields. Boron (B) and molybdenum (Mo) concentrations in the plants were significantly affected by B and Mo applications, but not by SC 16. A greenhouse study showed that the yields of alfalfa (Medicago sativa L.) and wheat were not affected by the addition of Ergostim. The addition of Ergostim did not affect the N or S concentration of wheat or three cuts of alfalfa.

scholarly journals Evaluation of bioavailability of light rare earth elements to wheat (Triticum aestivum L.) under field conditions

Geoderma ◽  
2007 ◽  
Vol 141 (1-2) ◽  
pp. 53-59 ◽  
Author(s):  
Jing Fang ◽  
Bei Wen ◽  
Xiao-Quan Shan ◽  
Huan-hua Wang ◽  
Jin-ming Lin ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Triticum Aestivum L ◽  
Field Conditions ◽  
Light Rare Earth ◽  
Light Rare Earth Elements
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