نتایج جستجو برای: metsulfuron

تعداد نتایج: 138  

Journal: :Pest management science 2008
Jaime Villaverde Melanie Kah Colin D Brown

BACKGROUND Pesticide degradation and adsorption in soils are key processes determining whether pesticide use will have any impact on environmental quality. Pesticide degradation in soil generally results in a reduction in toxicity, but some pesticides have breakdown products that are more toxic than the parent compound. Adsorption to soil particles ensures that herbicide is retained in the plac...

2015
Ismail B. S. Eng O. K. Tayeb M. A. Xinghui Qiu

Triazine-2-(14)C metsulfuron-methyl is a selective, systemic sulfonylurea herbicide. Degradation studies in soils are essential for the evaluation of the persistence of pesticides and their breakdown products. The purpose of the present study was to investigate the degradation of triazine-2-(14)C metsulfuron-methyl in soil under laboratory conditions. A High Performance Liquid Chromatograph (HP...

Journal: رستنیها 2012
A. Jalili A.A. Maassoumi M. Mahmoodi,

The geographic distribution of Astragalus L. (Fabaceae) was analyzed using a database of 12377 geo-referenced observations. In the old world (including Asia, Africa and Europe) there are ca. 2900 euploid species classified in 166 distinct sections. In this study using geographic information system (GIS) by means of DIVA-GIS (ver. 4) distribution map of some more important sections in the old wo...

Journal: :Proceedings of the New Zealand Weed and Pest Control Conference 1991

Journal: :Journal of environmental quality 2009
H Z Wang J Gan J B Zhang J M Xu S R Yates J J Wu Q F Ye

Rice paddy soils undergo several cycles of drying and wetting during a growing season. A laboratory study was conducted to determine the effect of soil moisture conditions on the distribution and kinetics of extractable and bound residues of 14C-metsulfuron-methyl in six Chinese paddy soils during 84 d of incubation at 15 degrees C with moisture contents varying from 20 to 50% of the field wate...

2003
Liping Wei Hongxia Yu Yue Sun Jianfang Fen Liansheng Wang

the only nitrogen source to stimulate their growth in the order , ~ ~ ~ =~ © 1998 Elsevier Science Ltd. All rights reserved INTRODUCTION Metsulfuron-methyl, cblorsulfttron, bensulfuron are sulfonyhirea herbicides. They display high herbicidal activity and very low mammalian toxicity and they are widely used in agriculture[I,2]. They exist, at neutral or basic pH values, almost exclusively in th...

Journal: :Journal of environmental management 2015
Kathleen E Hall Chittaranjan Ray Seo Jin Ki Kurt A Spokas William C Koskinen

On the Hawaiian Islands, groundwater is the principal source of potable water and contamination of this key resource by pesticides is of great concern. To evaluate the leaching potential of four weak acid herbicides [aminocyclopyrachlor, picloram, metsulfuron-methyl, biologically active diketonitrile degradate of isoxaflutole (DKN)] and two neutral non-ionizable herbicides [oxyfluorfen, alachlo...

2014
Daniel Clements Tony M. Dugdale Kym L. Butler Trevor D. Hunt Catherine de Rivera

Alligator weed Alternanthera philoxeroides (Mart.) Griseb. is an amphibious plant that aggressively invades aquatic and terrestrial environments. It has invaded at least 14 countries and is difficult to control. The present study investigates the effectiveness of herbicides and physical removal in eliminating patches of aquatic alligator weed in an early stage of invasion. This paper firstly de...

2012
Makhan Singh Bhullar Simerjit Kaur Tarundeep Kaur Tarlok Singh Megh Singh Amit J. Jhala

Limited information is available on control of broadleaf weeds in barley and response of barley cultivars to herbicides. Field experiments were conducted from 2007 to 2009 to evaluate post-emergence herbicides for control of broadleaf weeds in four barley cultivars. Herbicide treatments included 2,4-D sodium salt at 500 g ai ha 1, carfentrazone-ethyl at three rates (15, 20 and 25 g ai ha 1), an...

Journal: :Proceedings of the New Zealand Weed and Pest Control Conference 1985

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