Cycad butterfly infestation

Question

We have a certain butterfly that lays eggs on the new cycad leaves and after that the leaves wither away. I have photos of the butterfly and eggs. How can I keep the butterflies away from the new leaves.

• 

Answer 1

If you actually see caterpillars eating the leaves, you can use Bacillus thuringiensis (Bt), which you can find in garden centers or big box stores.

https://www.gardeningknowhow.com/plant-problems/pests/insects/prevent-caterpillars.htm