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Any of the scarab beetles do better in wet years, as would the nematodes, but biological controls such as nematodes have proven only marginally effective. You are correct, the lures do more harm than good if placed in the immediate area you want to protect. We used to joke that it would be better to put them in the neighbor's yard.lol There is an isomer of the lure attractant that is a very effective repellent, but it is easier to sell the lure to homeowners if they can see a bag of beetles.