If you want to know how to easily and effectively protect your onion beds for the entire season, quickly put aside everything you are doing and read this article.
Birch sawdust is an effective means of combating onion flies: what is it if not waste left over from harvesting birch firewood?
By the way, you can also use pine sawdust, although before using it, you should process it by soaking it in urea water for a day. To prepare the latter, you need to mix 1 tablespoon in 5 liters of water.
Birch sawdust should be soaked in regular water. It doesn't matter which option you use - the first or the second - after 24 hours, add 50 ml of birch tar to the water.
All that remains is to distribute the resulting mixture over the onion beds.
In addition to the fact that this method is able to combat the pest, thanks to its use you will protect the plantings from weeds, and also prevent the soil from drying out.
However, for the method to work, it must be applied in a timely manner, namely, when buds appear on the lilac and they are about to bloom.
The fact is that it is during this period that the onion fly begins to fly, and because of the tar, it will not even come close to your garden.
