had this problem last year and i've been vigilante ever since. i spray both BT and Spinosad over my back yard, not just my plants. the trees, grass, bushes, everything green.
another successful method that i'd easily recommend is turning your outdoors into a bird sanctuary. a few bird feeders, seeds and nectar, maybe a bird bath and bird house as well. they'll hunt any flying insect that dares trespass into your yard.
another successful method that i'd easily recommend is turning your outdoors into a bird sanctuary. a few bird feeders, seeds and nectar, maybe a bird bath and bird house as well. they'll hunt any flying insect that dares trespass into your yard.