the silica gel waste (sgw), after its collection from a local factory (kolkata, india) was modified with cationic surfactant and was utilized as an adsorbing media for the removal of 2,4- dichlorophenoxyacetic acid (2,4-d) from agricultural runoff of a tea garden. characterization of base adsorbent and modified adsorbent was carried out. the efficacy of the adsorbent was evaluated through both ...

The objective of this paper is to outline the current use of herbicide-resistant soybean and corn in the United States and describe the ramifications of utilizing these crops derived from biotechnology. The popular press and news articles detail the positions of consumers, environmental advocates, and the agriculture industry. Recent concerns expressed by consumers throughout the world have aff...

Oxyfluorfen is a selective pre and post emergent herbicide used to control certain annual broadleaf and grassy weeds in vegetables, fruits, cotton, ornamentals and on non-crop areas. It is a contact herbicide and light is required for it to affect target plants (USDA 1990). Oxyfluorfen has a strong tendency to adsorb to soil particles. It is therefore, unlikely to leach downward or to, contamin...

Alopecurus myosuroides Huds. (black-grass) has always been a major concern for cereal growers, and the development of herbicide resistance does not improve the situation. This review article summarizes the different traits involved in the dispersal pattern of herbicide resistant black-grass individuals within a susceptible field population. Therefore, the whole life cycle of black-grass is depi...

A comparison was made of the effect of glyphosate (Roundup®Plus), a post-emergency applied herbicide, and of Harness®GTZ, a pre-emergency applied herbicide, on the rhizobacterial communities of genetically modified NK603 glyphosate-tolerant maize. The potential effect was monitored by direct amplification, cloning and sequencing of soil DNA encoding 16S rRNA, rhizobacterial DNA hybridization to...

ln Bumilleriopsis filiformis, the thylakoid-membrane protein showing the highest turnover in the light has an apparent molecular weight o f 35 kDa. Loss o f this protein after chlor­ amphenicol treatment leads to a corresponding reduction o f herbicide-binding sites as well as photosystem-II activity (measured by e.g. H20 -» silicom olybdate) and cellular photosynthesis. This correlation is qua...

The acetyl-CoA carboxylase (ACCase)-inhibiting cyclohexanedione herbicide clethodim is used to control grass weeds infesting dicot crops. In Australia clethodim is widely used to control the weed Lolium rigidum. However, clethodim resistant Lolium populations have appeared over the last five years and now are present in many populations across the Western Australian wheat belt (Owen et al. 2007...