Pesticides

Pesticides

Any chemical or substance used to kill or inhibit the growth of pests that damage or interfere with the growth of crops, shrubs, tress, timber and other vegetation useful to humans.

Industry: Agricultural chemicals

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Pesticides

laser induced fluorescence

Agricultural chemicals; Pesticides

A method for measuring the relative amount of soil and/or groundwater with an in-situ sensor.

lateral sewers

Agricultural chemicals; Pesticides

Pipes that run under city streets and receive the sewage from homes and businesses, as opposed to domestic feeders and main trunk lines.

laundering weir

Agricultural chemicals; Pesticides

Sedimention basin overflow weir.

lc 50/lethal concentration

Agricultural chemicals; Pesticides

Median level concentration, a standard measure of toxicity. It tells how much of a substance is needed to kill half of a group of experimental organisms in a given time. (See: LD 50.)

ld 50/ lethal dose

Agricultural chemicals; Pesticides

The dose of a toxicant or microbe that will kill 50 percent of the test organisms within a designated period. The lower the LD 50, the more toxic the compound.

ldlo

Agricultural chemicals; Pesticides

Lethal dose low; the lowest dose in an animal study at which lethality occurs.

leachate

Agricultural chemicals; Pesticides

Liquid (mainly water) that percolates through a landfill and has picked up dissolved, suspended, and/or microbial contaminants from the waste. Leachate can be compared to coffee: water that has ...