Weeds

Weeds

1. Weed Biology

2. Major Weeds of Crops

   • Broad leaved weeds (Dicotyledons)
     • Cleavers
       • common heavier soils
     • Charlock
       • WOSR
     • Polygonums
       • Black Bindweed
         • spring drilled crops such as beet and cereals
       • Knotgrass
     • Mayweed
     • Poppy
     • Chickweed
   • Grasses (Monocotyledons)
     • Blackgrass
     • Italian Rye Grass
     • Couch
     • Wildoats
     • Barren Brome

3. Integrated weed control

   • Cultural Control
   • Herbicides
     • ALS
       • grassweeds
     • ACCase

4. Problems caused by Weeds

   • compete with crop (water,nutrients,space & light)
     • Reduced Yield
   • Hamper Harvesting
     • Clog machinery
   • weed seed or trash in harvested crop
     • reduced crop quality
   • crop lodging
     • reduced yield
   • contaminated seed
     • reduction in quality of OSR content