Hello all! A bit desperate here... So I moved in to a place 5 years ago, and over that time have spent a lot of time and money transforming a very poorly landscaped lot into something quite special. A large perennial component in my beds are various Heucheras and Heucherellas that I've planted over that time. A couple of years ago I noticed how some depleted and even died for no explainable reason. One day I was out with the leaf blower and one of my Heucheras actually blew right off of the crown, and that's when I figured it all out and saw that larvae (which I later found to be that of Black Vine Weevils) had completely girdled the plant. I was in shock, and quickly looked for a solution online. Thinking a solution would be easy, you can imagine my dismay when I realized just the opposite was true. So I carried on, and came up with what I thought was a viable solution. That was to do a soil drench with a product containing Imidacloprid in the fall after the risk of bee exposure. Over the last year or so, I thought I had a handle on things by doing this until this Spring when I noticed a Heuchera doing very poorly. I dug the plant up and found many larvae present in the interior root cluster. There were very few roots left at this point (yet somehow that plant is still limping along and not totally dead). I read about how to kill the larvae and it's not looking like there's very many solid methods out there. I've read about nematodes and biological control measures, but those seem rather expensive and far-reaching in terms of level of control effectiveness. So about a week ago I noticed many of my Heucheras and Heucherellas with the classic notched leaf edges that the adult weevils leave behind. I went out to observe my plants that night and found the adults, in significant quantity, on the majority of the plants all throughout my landscape. Great, I thought... a Black Vine Weevil infestation... just what I needed. But I then figured that the adult weevils must be far easier to control than the larvae, and it had been a couple of years since I last researched chemical control options and there must be options available by now. So I set out on Google to solve my problems and... nothing. It seems there is NOTHING in the chemical world that kills these awful things. Just to prove it to myself, I mixed up a combination concentrate dose of Sevin (Carbary) and Dominion 2L (Imidacloprid) and gave those suckers a good dousing. I even collected a few of the sprayed weevils in a jar to observe the effects. Well, it's been 2 days and none of the weevils in the jar have died. Sevin kills just about any insect in a matter of minutes, yet it nor Imidacloprid had no effect on these mutant creatures. What do I do? There's no chemical control for these things? Really? Our greatest chemist minds out there haven't found a physiological crack in the armor of these things? People say not to spray chemicals because you'll also kill the insect predators that feed on these things. Well, these so-called predators aren't doing much of anything because the predominant insect I'm seeing is the Black Vine Weevil, not predatory beetles that would be feeding on them. I know it's difficult to control the larvae, but is it really this impossible to have an effective control technique to control the adult or the insect at any stage in its lifecycle? With as many adults that I'm seeing this year, the larvae are going to be decimating the roots of my plants in mass quantity come Fall through next Spring when the new adults emerge to notch up the leaves again before laying thousands more eggs. If I had only a few plants, I'd go out there and pick them off my hand even, but I have so many plants and not nearly enough time on my hands to be spending hours outside at night with a flashlight and a bucket picking weevils off of the many plants I have all around my landscape. I'm at a loss. Last year it was the slugs destroying my hostas, but I've since found Deadline to effectively control that pest. This year it's the Black Vine Weevil destroying my Heucheras and Heucherellas, but have no idea how to solve them. Anybody out there with a good solution to solving these things? Please let me know!