Xref: kermit alt.home.lawn.garden:5934 rec.gardens:249342


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.