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Brome Management
Until the advent of Monitor, this highly competitive weed was difficult to control in the growing crop. Strategies traditionally centred on ploughing to at least 15cm, to bury Brome seed to a depth from which it cannot emerge. But burying unripe seeds enforces dormancy, a latent state which can last up to ten years in some species. Ploughing can turn up dormant seed buried in previous seasons, which prolongs its survival.
For best results with Monitor, integrate with cultural control measures such as ploughing and the use of stale seedbeds before drilling. Sowing a broad-leaved or spring break crop elsewhere in the rotation can break the cycle of seed return.
Anisantha Species
Action: Stale seedbed followed by Roundup then Monitor
The commonest Brome species, Barren Brome, germinates most rapidly in the dark. Encourage rapid germination by cultivating early after harvest, particularly in a minimum tillage situation. Rotational use of the plough can be beneficial, provided seed is evenly buried to at least 13cm. Kill emerged weeds before drilling using Roundup.
Ideally, for Great Brome control, apply Monitor from the start of crop tillering (GS 21) to the end of tillering (GS 29), and for Barren Brome control, from the latter until second node detectable (GS 32) of the crop.
Serrafalcus Species
Action: Delay cultivations followed by Monitor
The seed of these species is usually under-ripe at harvest. Leave it on the soil surface to ripen for at least a month before cultivating. Spray emerged weeds with Roundup prior to drilling next crop.
All three species are highly susceptible to Monitor, so an application between ear at 1cm (GS 30) and third node detectable (GS 33) of the crop will provide near total control.
