If you do have further problems later, then you can selectively reapply to the problem areas. Use a spray applicator, estimating quantities works for us. Usually three times the amount of powder in the spray bottle that you would normally use as a direct application, is a good and safe concentration when diluted by the water from the hose. Be sure to hit all leaves and stems, not just the ground. Benomyl, in addition to the spray bottle.
Every garden gets bugs.
The best solution we've found is Schultz's pyrethrium spray. We tried other stuff with mixed results, but this seems to be the best broad strategy for most bugs you will see. And as a bonus, it's 'green,' the active ingredient is made from chrysanthemums. Of course, once in a while you might get something unusual. In this case, we found any local hardware store usually has adequate supplies and effective advice to fight particular problems.