pesticides Flashcards
Pesticide
Substances or mixture thereof intended for preventing, destroying, repelling or mitigating any pest.
ALSO any substance or mixture intended for use as a plant regulator, defoliant or desiccant.
Insecticide
pesticide used to kill insects
herbicide
a chemical pesticide designed to control or destroy plants, weeds or grasses
fungicide
a pesticide used to deter or destroy fungi
nematocide
a chemical agent that is destructive to nematodes (worms)
Rodenticide
a chemical or agent used to destroy rats or other rodent pests
Fumigant
a pesticide vaporized to kill pests
pesticide classes
Organophosphates
Carbamates
Organochlorines
Herbicides/Defoliants
Organophosphates
organic esters of phosphoric acid
Carbamates
salts or esters of carbamic acid
Organochlorines
chlorinated hydrocarbon-based
Herbicides/Defoliants
mixed structure; often hormone derived
Acetylcholinesterase
Normal Transmission: ACh is released at the axon terminal. ACh crosses the synaptic cleft. ACh binds with a receptor on the post-synaptic membrane. AChE (E) stops the action of ACh.
Inhibition:
ACh is released at the axon terminal.
ACh crosses the synaptic cleft.
ACh binds with a receptor on the postsynaptic membrane.
Nerve agents (NA) block the ability of AChE to stop the action of ACh.
ACh continues to work and more ACh builds up in the synapse.
Acetylcholinesterase: Insecticides: ChE-inhibitors Signs and symptoms
Nausea, vomiting, diarrhea Weakness, twitching, paralysis Visual blurriness, tearing Confusion, lightheadedness, coma Bronchial secretions, wheezing, edema Sweating, salivation, urination
classification of pesticides by mode of action
Plant Growth Regulators
Amino Acid Biosynthesis Inhibitors
Lipid Biosynthesis Inhibitors
Cell Division Inhibitors
Photosynthesis Inhibitors
Cell Membrane Disrupters
Pigment Inhibitors
Unknown?!!
