From my years of testing, even before I wrote my article 7 years ago, I found that the larger insects in general were not affected by the coffee. Some insects are repelled by the coffee material. As an example, I poured the coffee material ask over some ants and that just swam around in it. Even after keeping them for a few days, they were still alive. Doing the same thing with grasshoppers and they were fine. It seems as if it over loafs the nervous system of smaller insects and doesn't seem to harm larger insects. This means that use of the coffee IS limited, but luckily, almost all the insects I have to desk with is taken care of by the coffee. My one problem with my hit pepper plants is pumpkin bugs, which eat hills in my peppers. Still going the manual method with these.
