My last field of wheat planted (in the last week of October) was heavily rained on before I could put on the pre emergent. How would you suggest I control the black grass now emerging - use something like Monolith, or try flufacinet type herbicides which claim that they are good even applied post emergent?
Post emergence black grass control after no pre emergent?
- Thread starter DanniAgro
- Start date
MNBVCXZ
Member
- Location
- Central Southern UK
Firstly know your Blackgrass and what it is if it is resistant to.
exactly. has it ever been sprayed with an SU (Lexus, Atlantis etc) if not, Atlantis should kill 99% (still doubt that). if it has and BG is less than 1 leaf, chuck 2 doses of 240g FFCT on 3 weeks apart.
- Location
- the brecks norfolk
I'd go with @Brisel idea, it's still dry and mild and weeds are still growing to take up chem. If you wait till the spring will you be able to travel early enough to do the job before the blackgrass gets too big?
I wouldn't waste an opportunity now give it another wack in the spring if you need or you need to.
I wouldn't waste an opportunity now give it another wack in the spring if you need or you need to.
- Location
- S E Glos
Brisel's suggestion is best though you need active growth in the weed for SUs to work and you may not see that for a while now that snowmageddon has arrived. If really small now the two doses of fft should be effective.
Snowmaggedon ?
Snowing your way is it?
- Location
- S E Glos
No but according to that august organ the Daily Express, everywhere is under six foot of snow.
Hindsight
Member
- Location
- Lincolnshire
As mentioned above, a flufenacet based application is probably best for application now. It will activity on the small emerged blackgrass, and any plants which have yet to emerge. I would not use FFT alone though, I would add in something else like DFF, pendimethalin, prosulfocarb, ethofumesate or SU chemistry.
If the blackgrass is still small and is likely to remain like that until spring, I would perhaps save SU chemistry until spring (if required), and use a product with and contact and residual activity as a partner to FFT now.
If the blackgrass is still small and is likely to remain like that until spring, I would perhaps save SU chemistry until spring (if required), and use a product with and contact and residual activity as a partner to FFT now.
Brisel, I followed your advice and sprayed it with Liberator and Atlantis a week after asking the question and cursed you roundly when it seemingly didn't work for several weeks. However, very suddenly at the start of February, all the BG died. Of course it will have to be checked carefully.
Funnily enough there were lots of spraying opportunities last December and during January.
Funnily enough there were lots of spraying opportunities last December and during January.
- Location
- Lincolnshire.
Pleased to hear this. Here we have had very good control too. From a sequence of pre and post emergence flufenacet. Combination of dry winter and good seedbeds provided ideal conditions for that chem IMO. We don’t use Atlantis ATM.