Monitoring and removal of Wild Oats is a topical issue


<div>The wild oats form panicles at the beginning of July in Southern and Western Finland. Finding the first specimens is the best and lowest cost preventative control. The fields have to be checked even if control has been performed by chemical means. In this way you can ensure the success of the control especially if the beginning of the growth season has been exceptionally dry.</div>

There is to be no delay in the removal of the wild oats

When wild oats have formed the panicles, there is no longer time to spare. In a trial carried out in 2005-2006 seeds were taken weekly from the panicles of wild oats after the panicles had formed and the seeds were germinated. Two weeks after the panicles had formed the first seeds were able to germinate. If wild oats are allowed to ripen, some of the seeds will fall onto the field long before the oat harvest. This is why the blocks have to be traversed using a vehicle track for example, and all of the panicles have to be removed carefully. It is easiest to detect the wild oats against the light.

Removal and destruction of wild oats

The wild oats are pulled from the ground with the roots and the whole plant is put carefully into an intact bag. The bag is removed from the field and destroyed for example by burning. It is not permitted to leave the bags on the edge of the field, but they absolutely must be destroyed.

Chemical control

If chemical control has been performed, with grains at the latest at the first node stage, it is worth starting the control weeding of the blocks in week 28 at the latest. It has been found that it takes longer on direct sown blocks for wild oats to start to grow. As the start of the growth season has been exceptionally dry in places, the wild oats may have started to grow only after the spraying, which may give the grower a nasty surprise. It is also always possible, that small strips have been missed in the field. The plants left in the field drop their seeds and even a good control result on the rest of the block will be lost. A single lush wild oat plant can easily produce over 100 seeds.

Identification of wild oats

It is worth learning to identify wild oats. Sometimes there will occur so called fatuoids amongst cultivated oats that misleadingly look like wild oats. If you are unsure of whether it is normal oats or wild oats, send the plant to Evira’s Seed Certification Unit in Loimaa for identification (PL 111, 32201 Loimaa). The identification is free of charge and a certificate is issued.

Additional information on the identification of wild oats can be found on Evira's Internet pages at the address (in Finnish): > Kasvintuotanto ja rehut > Siemenet > Hukkakaura > Havaitseminen ja tunnistaminen

For additional information, please contact:
Inspector Jari Poikulainen, Evira, tel. +358 20 77 25325, +358 40 719 1075

Related Categories: