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Re: ragweed

Cicadas, as stated in the just arrived letter from Arkansas, do not 
chew, though they do suck sap. The females also cut small slits in 
stems (usually of woody plants) which may cause 8-12-inch lengths of 
twig tips  to brown and topple over. This is especially evident on 
ash, elm, shingle oak and rough-leaved dogwood around here right now, 
where we have the same brood of cicadas finishing up their 
every-13-year orgy. In Shaw Arboretum's planted prairie, the cicadas 
have heavily damaged saplings of these species which sprouted up in 
the unburned portions this year.

I don't know what's eating your ragweed, but in your murdering them,  
mowing is preferable to herbicide treatments which clear the ground 
for new weeds to sprout. You probably know this , but ...


James C. Trager
Shaw Arboretum
P.O. Box 38
Gray Summit MO 63039
PH# 314-451-3512
FAX 314-451-5583
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