Practical recommendations
HOW TO FIGHT WEED
1.
Setup conservation tillage only in clean plots
In particular, perennial weeds should be controlled during the preceding crop.
2.
Plan fighting weed within the cropping cycle.
Alternate cereals with dicotyledon plants (peas, rape, beet…) as well as winter and spring crops.
Take advantage of dicotyledon crops to take effective action against graminaceous weed, and of
cereal crops to destroy dicotyledons.
3.
Perform blank sowing between crops to get rid of annual weeds and regrowth.
Upon combine passage, prepare a bed of homogenous seed with fine, superficial and pressed dirt to
obtain an even and as comprehensive emergence of weed seeds as possible. A week before
sowing, destroy the emerged plants mechanically or with a total non-remanent weed killer
4.
Do not sow too early to optimize blank seed effectiveness.
The longer the catch-crop, the more effective the weed killing. Sow the foulest plots last. Trust the
swiftness of UNIDRILL action and the quality of its emergences and sow on schedule without any
risks.
5.
Setup a clean and strong crop upon sowing
Use clean, weed-free seed with high germination potential. Lay the seed to obtain fast and grouped
emergence,
competing
with
weed.
6.
Use a seed drill that moves little soil, like UNIDRILL
UNIDRILL only works the seed row, thus reducing the risk of blank-seed-escaped seed emerging.
Wide intervals between rows are preferable, like those of the UNIDRILL (16.6cm). Only use the
seed drill near harrow when necessary.
7.
Closely monitor flora evolution during growth
With conservation tillage, usual weeds no longer occur in the same amounts and on the same dates;
furthermore, other species may occur. Be prepared for that evolution by updating your botanical
knowledge. Do a weekly tour of growing crops, progress through plots along large W-shaped
patterns, identify plants and their growing stage, take notes and keep a record for each plot.
8.
Vary the weed-killer chemical family from one year to another.
9. Trim borders, fallows and crops before seeding.
Mow, shred embankments, borders, ditches, fallows rather than applying total weed-killers; this could
lead to perennial weed selection and make them hard to eliminate. Some prefer growing Ray-grass
on borders; it smothers weeds and is easily controlled with a mower. In crops, destroy residual weed
patches by tropical treatment with a regular spraying equipment or manual atomizer.
10.
Avoid disseminating weed seed at harvest.
Start with cropping the cleanest plots. In weed-infested plots, crop the cleanest parts first.
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