"Die Spammer !!!" wrote in message ...
http://whatcom.wsu.edu/cranefly/CF%20Calendar.htm
click this and then click on winter...






Grubs don't feed on roots during the winter. As temperatures
decrease, they go deeper into the soil and become inactive until
spring. As Peter pointed out, a general purpose insecticide like
diazinon can still be used now and is worthwhile, as the grubs are
still small and hence easier to kill.


While I'm not an entomologist, I'm not sure a cranefly qualifies as a
grub. The term grub is generally used to describe the larvae of
beetles, eg june bugs, japanese beetles, not flies. These are the
larvae that are causing the majority of the problems in lawns in most
of the US.

Here's a good link to an agricultural article describing grubs, their
lifecycle and affect on turf:

http://www.gov.on.ca/OMAFRA/english/...cts/97-023.htm

Note that the larvae description of being C shaped, 6 legs, etc. also
does not fit the cranefly larvae. They indicate that all the grubs
they describe go deep in the soil as the temps drop, then return to
feed as temps rise again in spring.