Annual meadow-grass is the most common grass weed throughout the UK and although not highly yield robbing, it can cause inconvenience.
Due to its size the effect of annual meadow-grass on yield is limited, in excess of 50 plants per m² would be needed to reduce yield by 5%, but it does compete for nitrogen.
It can be annual or a short-lived perennial.
Annual Meadow-grass profile
|Resistance risk||Resistance to paraquat and simazine was recorded in hops and orchards in the UK in 198 but no known resistance has been found in arable crops|
|Leaves||Light green with a distinctive boat shaped tip, folded in the shoot|
|Ligules||Roundly pointed and serrated, 2-5mm.|
|Number of seeds produced per plant||Up to 500|
|Seed shed||April to November|
|Germination period||February to November|
|Germination depth||Up to 5cm|
|Does it have a secondary dormancy?||Some|
|Seed longevity||>5 years|
|Rate of seed decline with cultivations||45%|
|Geographical location||Annual meadow-grass is the most common grass weed throughout most of the UK|
|Soil type||The weed thrives on fertile soils which are disturbed frequently but it will grow in most conditions and withstands waterlogging or drought|
|Impact||Due to its size the effect of annual meadow-grass on yield is limited, in excess of 50 plants per m² would be needed to reduce yield by 5%, but it does compete for nitrogen. Its presence in the base of the crop at harvest can maintain moisture levels and slow the progress of combining.|