i've been using Niagra starch for 50 years- and have never had a bug eat my fabric!
personally i can not stand the smell of the Mary ellen's stuff---so i don't use it. i will stick with the niagra which has been around for a long-long time and is much less expensive since it doesn't say (quilting) on it- which seems to add a few bucks- and it doesn't have perfume added to it...which i find horrible.