I would like to air my lawn in the next few weeks, because I haven't done it for two years, but it has a lot of pests, how can I proceed?
practicing aeration with regularity, and therefore twice a year, allows to intelligently contain even the spread of weeds, given that many of them are cut and often even removed by this operation. If you intend to practice aeration in late winter or early spring, better yet; at this time of the year weeds are in full growth (as well as the small plants that make up the turf), the fact of cutting them and being able to eradicate a large part of them allows us to better control them, since the operations of aeration they remove most of the flowers and seeds of weeds, automatically controlling their population as well.
So I advise you to practice aeration, and maybe even intervene with a re-seeding of the lawn, in the areas where it is slightly emptied; in this way, in addition to removing flowers and seeds from weeds, you will be able to give an advantage to the grasses of the lawn in the race for survival: a healthy and dense lawn is more difficult to undermine by weeds.
If instead the quantity of weeds is massive, then before airing the lawn, it uses a selective herbicide on all the turf, and allow the weeds to desiccate: the operation of ariue rounding will allow to remove also the weeds or any dying weeds .
And a ventilated lawn is certainly healthier; with the aeration we are going to remove moss and weeds with shallow roots; in addition to this we remove the felt, which consists of the material that falls between the grass seedlings of the lawn, where it remains and compacts, producing a dense compact layer, which often does not allow water and fertilizers to reach the ground. The felt is formed over the months, and is composed of a little of the resulting material that we can not remove after cutting the grass, from the leaves of grasses that dry up, from the remains of dry leaves.
By raising the felt we give more air and breath to the lawn, and also to the ground on which it rests.
Proceed by cutting the lawn with the lawn mower, at the lowest possible level, so that the felt is as close as possible to the air; therefore you pass the special scarifier rake, or even an electric or petrol scarifier, it depends on how much ground we have to treat, but also on how long we don't practice the aeration: surely the rake is the instrument that more difficultly affects the felt in depth, as this operation depends on how much effort we are able to use in the operation; with the appropriate machinery instead, the work is performed more in depth and with greater regularity. Passing on the lawn we will see dry grass, straw, moss and weeds emerging, which must then be removed. After airing, the moment is propitious to spread some soil for turf, soft and rich in fertilizer, and to re-seed the lawn.
Afterwards, let the lawn develop to check if weeds are still present, in this case proceed with a suitable herbicide.