Long-term pesticide water concentrations were investigated in four agricultural streams and their mixture toxicity on algae was assessed, based realistic (i.e. observed) laboratory tests using (i) natural weekly samples (ii) reconstituted pesticide-spiked representing mixtures with predicted high mixture. This approach both covered the full complexity of controlled samples. monitoring data (tim...

Fish and other organisms are affected by pesticides which pollute the natural water through agricultural runoff. Fishes are common bioindicators of water pollution. In the present study bioassay of synthetic pesticide, Dichlorvos and a plant origin natural pesticide, Neem-On was separately done on Labeo rohita. Data obtained from the toxicity tests were evaluated using the Probit Analysis Stati...

The toxicity of pesticides on human reproduction is largely unknown--particularly how mixtures of pesticide products might affect fetal toxicity. The Ontario Farm Family Health Study collected data by questionnaire on the identity and timing of pesticide use on the farm, lifestyle factors, and a complete reproductive history from the farm operator and eligible couples living on the farm. A tota...

Laboratory studies were carried out to compare the toxicity of seven foliar insecticides to four species of adult beneficial insects representing two families of Hymenoptera: Aphelinidae (Aphytis melinus Debach, Eretmocerus eremicus Rose & Zolnerowich, and Encarsiaformosa Gahan) and Mymaridae (Gonatocerus ashmeadi Girault) that attack California red scale, Aonidiella aurantii (Maskell); sweetpo...

Propanil (3',4'-dichloropropionanilide) is one of the world’s most widely used rice herbicides, and it is extensively used in Arkansas, the leading rice producer in the United States (Webster and Gunnel1 1992). On average, the United States has applied approximately five kg/ha/year to about 70-100% of rice hectareacreage for the past two decades (US EPA 1987; Schlenk and Moore 1993). Arkansas, ...

BACKGROUND Honey bees are exposed to phytochemicals through the nectar, pollen and propolis consumed to sustain the colony. They may also encounter mycotoxins produced by Aspergillus fungi infesting pollen in beebread. Moreover, bees are exposed to agricultural pesticides, particularly in-hive acaricides used against the parasite Varroa destructor. They cope with these and other xenobiotics pri...

Just as houses are made of stones, so is science made of facts. But a pile of stones is not a house, and a collection of facts is not necessarily science. Bugged by Automatic Sprayers Automatic insecticide dispensers are designed to keep restaurants, schools, and other public settings free from annoying and unsanitary flying insects. They may also do something else: sicken at least some of the ...

Nuvan (DDVP) is a member of organophosphorus compounds. It is extremely toxic to insects and is widely used as insecticides. Nuvan has been taken for the acute toxicity to a fresh water fish Channa punctatus LC50 value calculated for the acute toxicity, which were 0.024 ml/L. Histopathological study of kidney and liver after 24hr, 48hr, 72hr and 96hr exposure to acute toxicity of Nuvan. Treatme...

The exponentially growing population, with limited resources, has exerted an intense pressure on the agriculture sector. In order to achieve high productivity the use of pesticide has increased up to many folds. These pesticides contain organophosphorus (OP) toxic compounds which interfere with the proper functioning of enzyme acetylcholinesterase (AChE) and finally affect the central nervous s...