The Effect of Alachlor and MON-097 on the Growth of Yellow Nutsedge and the Uptake of 14C Labeled Alachlor by Yellow Nutsedge and Soybeans PDF Download
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Author: James Price Worthington
Publisher:
ISBN:
Category : Herbicides
Languages : en
Pages : 124
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Book Description
Author: James Price Worthington
Publisher:
ISBN:
Category : Herbicides
Languages : en
Pages : 124
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Book Description
Author: Thomas Fred Armstrong
Publisher:
ISBN:
Category : Acetanilide
Languages : en
Pages : 196
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Book Description
Author:
Publisher:
ISBN:
Category : Herbicides
Languages : en
Pages : 480
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Book Description
Author: Ohio State University. Board of Trustees
Publisher:
ISBN:
Category : Universities and colleges
Languages : en
Pages : 752
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Book Description
Author:
Publisher:
ISBN:
Category : Pesticides
Languages : en
Pages : 1042
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Book Description
Author: Bareld Egge Groenwold
Publisher:
ISBN:
Category : Plant translocation
Languages : en
Pages : 240
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Book Description
A number of studies with 14C-labeled 2-chloro-2', 6'-diethyl- N-(methoxymethyl) acetanilide (alachlor) were conducted to obtain information about the mechanisms of uptake of this herbicide. In other studies, technical alachlor as well as the emulsifiable concentrate formulation of the chemical were used to investigate the effect of several factors on the toxicity of the herbicide. Corn and oats absorbed alachor primarily in a passive way. The uptake of the herbicide in both species was slightly reduced in the presence of metabolic inhibitors. The reduction was somewhat stronger in corn than in oats. A raise in temperature increased the uptake of alachlor only slightly. Q10 values of about 1.2 were found. The part of the total uptake affected by metabolic inhibitors followed Michaelis-Menten kinetics over the alachlor concentration range of 0.1 mM to 0.5 mM. Uptake of alachlor was measured in the presence of an analog, propachlor. Propachlor reduced the uptake of alachlor at a concentra- tion of 0.3 mM for both chemicals. At a concentration of 0.03 mM for each herbicide alachlor uptake was less reduced. Total uptake by corn and oats was nearly identical up to a concentration of 0.1 mM. At higher concentrations alachlor absorption by oats was about twice as high as by corn. This would suggest that selective uptake by the two species could at least partly account for the difference in tolerance towards alachlor. A study was conducted to determine if P, K and Ca levels in oat plants were affected by alachlor treatment. P and Ca content was not affected by the presence of alachlor, but a gradual decrease in K level with increasing herbicide concentrations was observed. Uptake of alachlor through the shoot region exceeded absorption by the roots in the two monocotyledonous species, corn and oats. Two dictos, soybean and cucumber, absorbed higher amounts of the herbicide through the roots. Shoot exposure of corn and cucumber was most damaging to the plant, while root exposure was more damaging to oats and soybean. The effect of alachlor on the growth of oats and cucumber at various levels of sub-irrigation and carrier volume could be explained on the basis of differences in effective absorption regions in the plants. Photoperiod had, in contrast with light intensity, no effect on the activity of the herbicide to corn, cucumber and oats. An increase in light intensity up to 1600 ft-c increased the toxicity of alachlor in corn and cucumber, but not in oats. The activity at 2000 ft-c was only slightly higher than at 60 ft-c, and less than at 660 ft-c. In the case of cucumber, an increase in alachlor concentration had very little effect at 2000 ft-c, in contrast with the other light intensities.
Author:
Publisher:
ISBN:
Category : Pesticides
Languages : en
Pages : 438
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Book Description
Author: Peter Böger
Publisher: Springer
ISBN: 9783642639722
Category : Science
Languages : en
Pages : 0
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Book Description
Chemical pest control is in use in practically every country in the world since agrochemicals play a decisive role in ensuring food supply and protection against damage by pests, insects and pathogenic fungi. Particularly in the half century since World War II, food production has risen dramatically in most parts of the world. In the last 20 years, the yield of major crops has roughly doubled in Western agriculture and there is still the potential for further achievements, particularly in the developing countries. The world's cereal and rice production, now more than 2 billion tons/year, has to increase by 2. 4% annually to cope with the rising food demand caused mainly by the growing population and improvement of living standards in most of the developing countries. Such a demand for food has to be achieved by higher yields from the restricted arable land already in use. Global farm land resources are about 1. 4 billion ha, of which 1. 2 billion ha is cultivated with major crops. Experts agree that a future substantial addition of new produc tive areas is unlikely. Those with a high yield potential are already in use; new fields with a lower output may possibly be obtained by cultivation of arid or cold areas. More recently, new areas of large-scale farmland have been devel oped in tropical regions of Latin America, primarily in Argentina and Brazil, at the cost of the destruction of tropical rain forest.
Author: Marcelo Larramendy
Publisher: BoD – Books on Demand
ISBN: 9533079754
Category : Technology & Engineering
Languages : en
Pages : 626
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Book Description
The content selected in Herbicides, Theory and Applications is intended to provide researchers, producers and consumers of herbicides an overview of the latest scientific achievements. Although we are dealing with many diverse and different topics, we have tried to compile this "raw material" into three major sections in search of clarity and order - Weed Control and Crop Management, Analytical Techniques of Herbicide Detection and Herbicide Toxicity and Further Applications. The editors hope that this book will continue to meet the expectations and needs of all interested in the methodology of use of herbicides, weed control as well as problems related to its use, abuse and misuse.
Author: Andrew Price
Publisher: BoD – Books on Demand
ISBN: 9535111124
Category : Technology & Engineering
Languages : en
Pages : 666
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Book Description
Herbicide use is a common component of many weed management strategies in both agricultural and non-crop settings. However, herbicide use practices and recommendations are continuously updated and revised to provide control of ever-changing weed compositions and to preserve efficacy of current weed control options. Herbicides - Current Research and Case Studies in Use provides information about current trends in herbicide use and weed control in different land and aquatic settings as well as case studies in particular weed control situations.
