نتایج جستجو برای: pesticide toxicity
تعداد نتایج: 130111 فیلتر نتایج به سال:
This study was designed in such a way to assess the toxicity effect of 2,4D (Dichlorophenoxyacetic acid) pesticide in fish physiology and its antioxidant stress. Channa striatus fish were administered with two different doses compensation of 2,4-D pesticide of 100 and 200 mg/kg. After a matter of time interval the effect of 2,4-D on fish behavior and its toxic level was determined by assessing ...
Pesticides need to be applied accurately and uniformly. Too little pesticide results in poor pest control and reduced yields, while too much injures the crop, wastes chemicals and money, and increases the risk of polluting the environment. Achieving satisfactory results from pesticides depends heavily on five major factors: 1. Positive identification of the pest. 2. Choosing the least persisten...
This fact sheet describes what the Material Safety Data Sheet is, how it is to be used, and covers the sections of the MSDS. The Material Safety Data Sheet (MSDS) is a technical bulletin that provides workers and emergency personnel with the proper procedures for handling or working with that substance. The MSDS includes information such as physical data (melting point, boiling point, flash poi...
Risks to non-target species from pesticides have been a concern since the 1960s, but arthropods never received attention as vertebrate species. Pesticide exposure could be contributing factor in decline of endangered Cicindela nevadica lincolniana, well declines predaceous and pollinating insects. Consequently, we examined susceptibility three common (glyphosate, bifenthrin, imidacloprid) larva...
Rice (Oryza sativa L.) is one of the most important food crops worldwide. However, it is also a valuable tool in assessing toxicity of organic and inorganic compounds. For more than 20 years, it has been an approved species for standardized phytotoxicity experiments. The objective of this study is to determine germination and radicle (root) and coleoptile (shoot) growth of rice seeds exposed to...
BACKGROUND Exposure to organophosphate (OP) pesticides is an occupational hazard for farmworkers and affects their children through the take-home pathway. OBJECTIVES We examined the effectiveness of a randomized community intervention to reduce pesticide exposure among farmworkers and their children. METHODS We conducted a baseline survey of a cross-sectional sample of farmworkers (year 1) ...
The effect of residual concentrations of organophosphate pesticide chlorpyrifos (Lorsban 4E) on the activity of the acetylcholinesterase enzyme and oxygen : nitrogen ratio in the mussel Aulacomya ater was analyzed. Toxicity tests show a sensitivity to the pesticide in the bivalve estimated at 16 μg L(-1) (LC(50-96 hours)). Concentrations between 0.2 and 1.61 μg L(-1) were able to inhibit signif...
Pesticides are designed to control pests. They all are toxic to some level; otherwise they would not kill pests. They can also be toxic to non-target organisms such as plants, animals or humans. Exposure to a sufficient amount of almost any pesticide can affect a person—either through illness, eye exposure or skin sensitivity. Excess of any compound will be harmful to life and consider leader t...
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