"Kay" wrote in message
...
In article , pied piper
writes

It deters the worm from surfacing thus leaving no casts and worms burrow
both vertically and horizontally.

The reason the worm surfaces is because it feeds on the surface. If you
deter it from surfacing you deprive it of its food source. Can you
therefore explain why the worm is going to remain burrowing in the area
where you have applied the substance?
--
Kay
"Do not insult the crocodile until you have crossed the river"

organic matter on which the worms feeds can be as deep as two feet . Casting
worms are a pest to lawns and sports turf surfaces therefore preventatives
need to be used to control casting worms . Years ago Sydane was used which
just killed everything in the ground which is rightly why it has now been
banned . Unfortunately the preventatives are more costly and have to be
applied every three to four months for casting worms and every year for
leatherjacket control.
Of course the other way is to add lime to your soil to change the PH which
will also deter the worms but this is not suitable for sand based fescue
grasses.
Hope this helps and doesnt confuse you further Kay