If you use one covercrop there is NO diversity, so you migh add to a
problem.
I have seen results on (and use them myself) using plants to attrackt
as much insects as possible, the insects that eat your crops will be
outnumbered with there predators in no time, because there is a high
diversity the predators will survive and as soon as the 'bad'bugs
reproduce themselves they will be limited in amount by the predators.
In monocropping there is an abundant amout of food for bad insects
and no food for their predators, this is why it can get out of
hand before the predators arrive.
I have seen (on a nursery) plants to attract insects just before the
wanted crops attract them, predators will feed and reproduce on these
plants and are allready there when the unwanted insects start to feed on
the crops.
Frits v/d Laan
Certified Organic Horticulture
http://web.inter.nl.net/users/F.vd.Laan/
The Netherlands
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