No it is not a BT (bacillus thuringiensis israelensis

it is our!) BT is usually used in protecting leafy plant, that when the insect eats the leaf, or the stem the crystal in the BT disintegrate the insect digestive tract.
With this Beatle that its larvae borrows in the growth center of the palm tree you cant go deep sufficiently.
I use a combined treatment that use 3 products, one that keels in touch, 2 that kill when eaten, one of them is systemic when is entered to the growth center. I have doing something good because my tree is the only Canarien palm in a radius of 3 km that is not infected! Here are trying to fined a treatment that use Nematodes, I am hopping!