Weevils are out of control - getting ridiculous

[savemejebus]

I've pretty much given up on the 'squish them in my fingers' approach. The lil bastards are in at least 10 trees in the yard, doing varying degrees of damage from pretty much nothing to, well, the below pics of our sweetheart lychee tree tell the story. I'm at a loss for what to do. Even if I wanted to go the pesticide route on non-fruiting trees, they are in other trees that I would not spray and thus that would be a losing battle.

Is there any natural predator for these a-holes? I'm willing to introduce venomous snakes if that takes care of the problem (yes - I have a plan for when the snakes get out of control. Silverback gorillas.). Or should I just stop worrying because every little thing gonna be alright?

[Cookie Monster]

I've been told that soil application of bifenthrin does the trick.

I went the "organic" route and mulched over all the grass, which drastically reduced the population of both sri lankan weevils and their evil cousin, the cuban may beetle.

[Carbo]

I feel your pain.  My Cogshall is full of notched leaves, courtesy of these buggers.  I walk around the tree several times a day and hit the ones I see with some insecticidal soap.  It kills 'em quickly, but there are always more that I don't see and newcomers every day.

[goosteen]

I've heard diatomaceous earth will kill bugs... You put it in water and spray the trees... it's really non toxic to us... Actually I only bring it up, because a geologist came to my house and pointed out all the white dirt I have when I dig down a foot, is diatomaceous earth.

[murahilin]

Try beneficial nematodes. http://www.arbico-organics.com/category/beneficial-nematodes

[savemejebus]

Try beneficial nematodes. http://www.arbico-organics.com/category/beneficial-nematodes

Been there. Done that. Didn't make any difference whatsoever (and yes, ordered the ones from Arbico).

[fisherking73]

I see them once in a while but they don't seem to hang out for long. Not complaining but wonder why

[murahilin]

Try beneficial nematodes. http://www.arbico-organics.com/category/beneficial-nematodes

Been there. Done that. Didn't make any difference whatsoever (and yes, ordered the ones from Arbico).

Is your lawn treated with any pesticides? You applied the nematodes to the ground and watered well for a few days following treatment?

[savemejebus]

Try beneficial nematodes. http://www.arbico-organics.com/category/beneficial-nematodes

Been there. Done that. Didn't make any difference whatsoever (and yes, ordered the ones from Arbico).

Is your lawn treated with any pesticides? You applied the nematodes to the ground and watered well for a few days following treatment?

No. Just threw the box in the air, tried my best to hit it with the hose, and then just let it sit wherever it landed.

Yes. Followed the directions. No. Lawn not treated with anything. They don't work on sir lankan weevils. At least not in my yard.

[zands]

Go out at night with a flashlight and you will see five times more of them. If you gave your lychee super nutrition via foliars they just might stop eating those leaves. I have  a Kent mango tree they used to attack but now they don't. The tree got stronger as it got older so that the leaves had natural defenses and repelled them. (my opinion)

If you are dedicated go out at night. Put tarp on the ground. Shake the branches. Stomp on them. Squishing one at a time is too slow. Or gather up the tarp so the bugs get bunched up and drown them in a five gallon bucket of water. A little kerosene aka diesel fuel on the water will really do them in

http://charlotte.ifas.ufl.edu/horticulture/newsarticles/SriLankaWeevil.pdf
One additional mechanical control method
involves (believe it or not) the use of an open,
up-side down umbrella! Shake a branch
infested with weevils while holding the
umbrella under the branch. The weevils will
fall into the umbrella for easy disposal.
Natural enemies to control these beetles seem
absent other than one identified fungal
disease.
One final note involves the Sri Lanka Weevil
larvae. Although the larvae feed on plant.........

[zands]

The good news is that there are several
insecticides that can be used on ornamental
(non-edible) trees that will effectively control
the Sri Lanka Weevil. Making sure to always
read and follow the label instructions - it is
the law - you can try carbaryl, acephate or an
insecticide that contains a pyrethroid labeled
for leaf-feeding insects. Always make sure
that both the pest and the host plant are listed
on the label.
http://charlotte.ifas.ufl.edu/horticulture/newsarticles/SriLankaWeevil.pdf

[Treees]

They are winning the war in my yard.  Wish lizards developed taste for them.

[From the sea]

No. Just threw the box in the air, tried my best to hit it with the hose, and then just let it sit wherever it landed.

Yes. Followed the directions. No. Lawn not treated with anything. They don't work on sir lankan weevils. At least not in my yard.

that made my morning

[Vernmented]

Did you check the nematodes with a microscope when you got them? I had to get them shipped to me 4 times before I got a live package. My diaprepes have been drastically reduced. I also found out it is easier to pinch the heads off then squish the abdomen.