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korovii
ZAGORCIC MILANA V1
 Korov je biljka koja samoniklo raste tamo gde je čovek ne
želi, odnosno u agroekosistemima. Ove vrste biljaka se
još nazivaju i segetalnim (lat. seges - usev, njiva).
Zivotna forma korova
 Korovi su pretežno zeljaste biljke, u čijem rasprostranjenju i dinamičnom razvoju
presudan uticaj ima antropogeni faktor. To mogu biti autohtone vrste ili sa drugih
podneblja, a koje je opet čovek doneo. Njihov uspešan razvoj na obradivim
površinama se objašnjava ne samo time što im čovek obezbeđuje sve uslove,
mada su oni namenjeni kulturnim biljkama, već i time što su u takvim staništima
oslobođene kompeticije kakvu imaju u svojim prirodnim staništima. Ove biljke su
bioindikatori zemljišta koje sadrži organski otpad, ali su i akumulatori teških
metala i drugih toksičnih jedinjenja koja stvara čovek
Znacaj korova
 Korov je nepoželjan jer gajenim, odnosno kulturnim biljkama oduzima prostor,
vodu, minerale iz đubriva, pa i svetlost. Ipak, neke korovske biljke mogu biti veoma
dekorativne, neretko lekovite, pa čak i jestive. Bez obzira na to, čovek se trudi da ih
odstrani iz agroekosistema
razmnozavanje
 Vegetativno razmnožavanje je karakteristika
 višegodišnjih biljaka i zastupljeno je kod
 korovskih vrsta, pre svega onih koje imaju
 relativno dobro razvijene podzemne organe
 (podzemne izdanke ili korenove sa adventivnim
 pupoljcíma).
 Značajno je da ove biljke imaju i normalno polno
 razmnožavanje, dakle pomoću semena. Prema
 tome, ovo je grupa korova koja ima i polno i
 bespolno (vegetativno) razmnožavanje, te
 predstavlja najteže iskorenljive korove, koji
 zadaju najviše problema biljnoj proizvodnj
Suzbijanje korova
 Uglavnom se protiv korova primenjuju takozvane agrotehničke mere, ali i
hemijske. Ove prve podrazumevaju mehaničko uklanjanje korova, čupanjem ili
okopavanjem između useva kako bi se onemogućio rast korova. Hemijske mere se
sprovode brže i sa manje napora, ali njihovim primenjivanjem postoji rizik od
zagađivanja prirode i po ljudsko zdravlje. Hemijska sredstva koja se koriste protiv
korova nazivaju se herbicidi
PALLAS 75 WG – herbicid
Maslačak se teško iskorenjuje jer njegovo seme raznosi i najmanji vetar.
Lisac ili vodeni biber se teško iskorenjuje
sa obradivog zemljišta.
Kukolj koji je ušao i u poslovicu kako bi dočarao loše ljude među dobrima,
zapravo je biljka lepog cveta iz porodice karanfila.
Mala vodnjača, parazitska biljka koja živi na korenu
biljke-domaćina, čest je korov na poljima lucerke
Vilina kosica, još jedna parazitska biljka, parazitira na izbojcima mnogih
povrtarskih vrsta, a može potpuno uništiti lucerku

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Korovi prezentacija

  • 2.
  • 3.
  • 4.  Korov je biljka koja samoniklo raste tamo gde je čovek ne želi, odnosno u agroekosistemima. Ove vrste biljaka se još nazivaju i segetalnim (lat. seges - usev, njiva).
  • 5.
  • 6. Zivotna forma korova  Korovi su pretežno zeljaste biljke, u čijem rasprostranjenju i dinamičnom razvoju presudan uticaj ima antropogeni faktor. To mogu biti autohtone vrste ili sa drugih podneblja, a koje je opet čovek doneo. Njihov uspešan razvoj na obradivim površinama se objašnjava ne samo time što im čovek obezbeđuje sve uslove, mada su oni namenjeni kulturnim biljkama, već i time što su u takvim staništima oslobođene kompeticije kakvu imaju u svojim prirodnim staništima. Ove biljke su bioindikatori zemljišta koje sadrži organski otpad, ali su i akumulatori teških metala i drugih toksičnih jedinjenja koja stvara čovek
  • 7. Znacaj korova  Korov je nepoželjan jer gajenim, odnosno kulturnim biljkama oduzima prostor, vodu, minerale iz đubriva, pa i svetlost. Ipak, neke korovske biljke mogu biti veoma dekorativne, neretko lekovite, pa čak i jestive. Bez obzira na to, čovek se trudi da ih odstrani iz agroekosistema
  • 8. razmnozavanje  Vegetativno razmnožavanje je karakteristika  višegodišnjih biljaka i zastupljeno je kod  korovskih vrsta, pre svega onih koje imaju  relativno dobro razvijene podzemne organe  (podzemne izdanke ili korenove sa adventivnim  pupoljcíma).
  • 9.  Značajno je da ove biljke imaju i normalno polno  razmnožavanje, dakle pomoću semena. Prema  tome, ovo je grupa korova koja ima i polno i  bespolno (vegetativno) razmnožavanje, te  predstavlja najteže iskorenljive korove, koji  zadaju najviše problema biljnoj proizvodnj
  • 10. Suzbijanje korova  Uglavnom se protiv korova primenjuju takozvane agrotehničke mere, ali i hemijske. Ove prve podrazumevaju mehaničko uklanjanje korova, čupanjem ili okopavanjem između useva kako bi se onemogućio rast korova. Hemijske mere se sprovode brže i sa manje napora, ali njihovim primenjivanjem postoji rizik od zagađivanja prirode i po ljudsko zdravlje. Hemijska sredstva koja se koriste protiv korova nazivaju se herbicidi
  • 11. PALLAS 75 WG – herbicid
  • 12.
  • 13. Maslačak se teško iskorenjuje jer njegovo seme raznosi i najmanji vetar.
  • 14. Lisac ili vodeni biber se teško iskorenjuje sa obradivog zemljišta.
  • 15. Kukolj koji je ušao i u poslovicu kako bi dočarao loše ljude među dobrima, zapravo je biljka lepog cveta iz porodice karanfila.
  • 16. Mala vodnjača, parazitska biljka koja živi na korenu biljke-domaćina, čest je korov na poljima lucerke
  • 17. Vilina kosica, još jedna parazitska biljka, parazitira na izbojcima mnogih povrtarskih vrsta, a može potpuno uništiti lucerku