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East Lansing (MSUHort) Alfalfa Weevil Development Assist Chart (Report issued 8/1/2014 20:22)

Start scouting for adults when temperatures are greater than 48°F

Life Stage Predicted Date Observed Date
Light feeding starts 5/21/2014
(Temperatures from 3/1 - 5/21 used)
 
Major feeding starts 5/29/2014
(Temperatures from 5/21 - 5/29 used)
 
Pupation starts (major feeding continues) 6/6/2014
(Temperatures from 5/29 - 6/6 used)
 
End of pupation and feeding 6/18/2014
(Temperatures from 6/6 - 6/18 used)
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