Types Pesticide
1 types
1.1 neonicotinoid pesticides
1.2 organophosphate pesticides
1.3 carbamate pesticides
1.4 organochlorine insecticides
1.5 pyrethroid pesticides
1.6 sulfonylurea herbicides
1.7 biopesticides
1.8 classified type of pest
1.9 further types of pesticides
types
pesticides referred according type of pest control. pesticides can considered either biodegradable pesticides, broken down microbes , other living beings harmless compounds, or persistent pesticides, may take months or years before broken down: persistence of ddt, example, led accumulation in food chain , killing of birds of prey @ top of food chain. way think pesticides consider chemical pesticides derived common source or production method.
some examples of chemically-related pesticides are:
neonicotinoid pesticides
neonicotinoids class of neuro-active insecticides chemically similar nicotine. imidacloprid, of neonicotanoid family, used insecticide in world. in late 1990s neonicotinoids came under increasing scrutiny on environmental impact , linked in range of studies adverse ecological effects, including honey-bee colony collapse disorder (ccd) , loss of birds due reduction in insect populations. in 2013, european union , few non eu countries restricted use of neonicotinoids.
organophosphate pesticides
organophosphates affect nervous system disrupting acetylcholinesterase activity, enzyme regulates acetylcholine, neurotransmitter. organophosphates insecticides. developed during 19th century, effects on insects, similar effects on humans, discovered in 1932. poisonous. however, not persistent in environment.
carbamate pesticides
carbamate pesticides affect nervous system disrupting enzyme regulates acetylcholine, neurotransmitter. enzyme effects reversible. there several subgroups within carbamates.
organochlorine insecticides
they commonly used in past, many have been removed market due health , environmental effects , persistence (e.g., ddt, chlordane, , toxaphene).
pyrethroid pesticides
they developed synthetic version of naturally occurring pesticide pyrethrin, found in chrysanthemums. have been modified increase stability in environment. synthetic pyrethroids toxic nervous system.
sulfonylurea herbicides
the following sulfonylureas have been commercialized weed control: amidosulfuron, azimsulfuron, bensulfuron-methyl, chlorimuron-ethyl, ethoxysulfuron, flazasulfuron, flupyrsulfuron-methyl-sodium, halosulfuron-methyl, imazosulfuron, nicosulfuron, oxasulfuron, primisulfuron-methyl, pyrazosulfuron-ethyl, rimsulfuron, sulfometuron-methyl sulfosulfuron, terbacil, bispyribac-sodium, cyclosulfamuron, , pyrithiobac-sodium. nicosulfuron, triflusulfuron methyl, , chlorsulfuron broad-spectrum herbicides kill plants weeds or pests inhibiting enzyme acetolactate synthase. in 1960s, more 1 kg/ha (0.89 lb/acre) crop protection chemical typically applied, while sulfonylureates allow little 1% material achieve same effect.
biopesticides
biopesticides types of pesticides derived such natural materials animals, plants, bacteria, , minerals. example, canola oil , baking soda have pesticidal applications , considered biopesticides. biopesticides fall 3 major classes:
microbial pesticides consist of bacteria, entomopathogenic fungi or viruses (and includes metabolites bacteria or fungi produce). entomopathogenic nematodes classed microbial pesticides, though multi-cellular.
biochemical pesticides or herbal pesticides naturally occurring substances control (or monitor in case of pheromones) pests , microbial diseases.
plant-incorporated protectants (pips) have genetic material other species incorporated genetic material (i.e. gm crops). use controversial, in many european countries.
classified type of pest
pesticides related type of pests are:
further types of pesticides
the term pesticide include these substances:
defoliants : cause leaves or other foliage drop plant, facilitate harvest.
desiccants : promote drying of living tissues, such unwanted plant tops.
insect growth regulators : disrupt molting, maturity pupal stage adult, or other life processes of insects.
plant growth regulators : substances (excluding fertilizers or other plant nutrients) alter expected growth, flowering, or reproduction rate of plants.
wood preservatives : used make wood resistant insects, fungus, , other pests.
Comments
Post a Comment