The efficacy of maximum label rates of bifenthrin applications to dry tires to prevent Aedes mosquito breeding was investigated by field colonization and bioassay trials in shaded and unshaded locations. Aedes notoscriptus and Culex quinquefasciatus larvae were the most abundant species present in the field colonization trial. Colonization and survival of Ae. notoscriptus larvae to the late ins...

Trace organic compounds associated with human activity are now ubiquitous in the environment. As the population becomes more urbanized and the use of pesticides and person care products continues to increase, urban waterways are likely to receive higher loads of trace organic contaminants with unknown ecological consequences. To establish the extent of trace organic contamination in urban runof...

The American River flows for nearly 50 km through highly urbanized lands surrounding Sacramento, California, USA. Twenty-three streams, drainage canals, or pumping stations discharge urban runoff to the river, with the cumulative effect of nearly doubling the river's flow during rain events. During winter storms, the water column in the most downstream 13-km reach of the river exhibited toxicit...

Pyrethroid insecticides have been used to control larvae or adults of the westerncorn rootworm (WCR), Diabrotica virgifera virgifera LeConte, a key pest of field corn inthe United States. In response to reports of reduced efficacy of pyrethroids in WCRmanagement programs in southwestern areas of Nebraska and Kansas the presentresearch was designed to establish a baseline of ...

A 17-month-old male King Charles cavalier was presented with acute onset of generalized body tremors and facial twitching after being exposed to 2 different compounds of the pyrethrins/pyrethroids group and imidacloprid. Bifenthrin toxicity was confirmed by gas chromatography mass spectrometry. Initial therapy consisted of diazepam, metacarbamol and IV fluids, followed by general anesthesia wit...

Drainage ditches are indispensable components of the agricultural production landscape. A benefit of these ditches is contaminant mitigation of agricultural storm runoff. This study determined bifenthrin and lambda-cyhalothrin (two pyrethroid insecticides) partitioning and retention in ditch water, sediment, and plant material as well as estimated necessary ditch length required for effective m...

A resistance monitoring program conducted for the polyphagous whitefly, Bemisia tabaci (Gennadius), in Imperial Valley, CA, USA generated a large set of LC50s for adults collected from broccoli, cantaloupe and cotton crops over a four-year period. A vial bioassay and, subsequently, a yellow-sticky card bioassay produced similar temporal profiles of relative susceptibilities to the pyrethroid in...

Mealybugs (Phenacoccus solenopsis) is a diverstating insect pect of agriculture crops, vegetables, fruits and ornamental plants. In the current study, impact synthetic pesticides (malathion, profenophos, bifenthrin), organic plant extracts (neem, tobacco eucalyptus) natural enemies such as lady bird beetle (Coccinella septempunctata), brumus beetle, (Brumus suturalis), spider (Cheiracanthium me...