pesticide_classification including herbicides

PPTX

1. PESTICIDE CASSIFICATION
Marcus L Richards

2. According to pest they control: (include photos of
insects, nematodes weeds etc and explain what
each define each category)
Herbicidesusedforkillingweedsorherbs.e.g,
Gramoxone
Insecticides-usedforkillinginsects.e.g.Sevin
Fungicides-usedforkillingfungi.e.g.mankocide
Nematicides-usedforkillingnematodee.g.Furadan
Rodenticides-useforkillingrodents(rat,mice)e.g.
Klerat
Acaricides-usedforkillingaracnids(mites)e.gnew
mectin
Molluscocides-usedforkillingMolluscs(snails,slugs)
e.g.Slugit
CLASSIFICATION OF PESTICIDES

3. According to mode of action:
Contact–killonlyinsectstheyaresprayedordusted
onto.e.g.………
Stomachacting-killonlyinsectsthateatplantparts
sprayedwithinsecticidee.g.Dipel
Systemic–Thistypeofinsecticideistransported
withintheplantandkillinsectswhenthey
sucksaporeatpartsoftheplante.g…..
•Fumigant-kill insects that inhale toxic vapours of the
chemical e.g. phostoxin
For Insecticides

4. According to mode of action
Contact(Protectant)-killonlyfungisprayedor
dustedwiththefungicide,orfungalspores,
whichcomeintocontactwiththefungicide.e.g.
Kocide
Systemic(Eradicant)-Thistypeoffungicidesis
transportedwithintheplantandkillsfungi
growingwithintissueoftheplant.
For Fungicides

5. According to mode of action
For Herbicides
Pre-emergence–aherbicideappliedtothesoil
duringtheperiodafterplantingandbefore
germination(usually1-5daysafterland
preparation).e.gGesaprim
Selective–aherbicidethatkillssmallweedsand
seedsbutleavethecropunharmede.gGesagard.
N.Bselectiveherbicidesarespecificforcertain
crops.
Post-emergence–aherbicideappliedtogrowing
weedsaftercropemergenceortransplantinge.g
Fusilade,Gramoxone,Round-up.

6. Contact-aherbicidethatkillonlysoftgreenpartsof
weedssprayedwiththeherbicidee.gGramoxone.
Systemic-aherbicidethatisabsorbedintotheplant
afterspraying,andistransportedtootherplantparts
whereitcausesdeathe.gRound-up.
Non-selective-aherbicidethatkillsallplantssprayed.
e.gRound-up.

7. According to formulation
Dust-pesticidepreparedasdryfineparticlese.gSevin
85WP
Granules(G)-Pesticidespreparedaslargedryparticles
e.gFuradan.
WettablePowders(WP)-consistoffinelydivided
particleswithothersubstancesthatenablethepowderto
bemixedwithwatertoformastablesuspensione.g.
kocide.
Emulsifiableconcentrate(EC)-apesticidedissolvedin
anorganicsolventtowhichanemulsifierisaddedto
enablepropermixing.

8. Dry Bait-pesticidemixed with edible products to
form dry pellets, which are attractive to pests.
e.g Klerat.
 Smokes-the pesticide is mixed with an oxidant
and combustible material, which generates hot
gas e.g, mosquito coil.
•Others

9. According to active compound (active ingredient)
Chlorinatedhydrocarbone.gKelthane
Organphosphatese.gBasudin
Carbamatee.gSevin
Pyrethroidse.gDecis
Others

10. According to persistency
•Persistent–apesticidethatremainsinthe
environmentforalongtimee.gHyvar-x
•Non-persistent-apesticidethatremainsin
theenvironmentforaveryshorttime.e.g
Dipel