killing lily beetles
I read somewhere on the web last year that a solution of 1 part ammonia in 10 parts of water can be used to kill the lily beetle larva. You soak the soil around the plant. Having tried Bayer's Rose & Flower systemic and Sevin at different times with little success, I'd like to give this a shot before giving up entirely on lilies. The foliage is now so disfigured, I almost avoid looking at them. My question is: when would be the best time to use this solution? In early spring just as the lilies are emerging? Or after the blooms have gone by? Which gives a better chance of killing the larvae?