Nematodes have also helped me with grubs, fleas, ticks, and mosquitoes. Great beneficial insect! They do need to be reapplied once or twice a year to be completely effective but anything to keep the villains of nature under control is worth my dimes and nickles. I have never tried the cucumber peels but I always keep an open mind, sounds like a good idea. Cucumbers contain a compound known as “trans-2-nonenal” that repels ants as well as cockroaches. Thank you Kiskin for the hot tip!