What are some events about the Hawaiian sugar industry.

Here are what I would say are the most important events
that have to do with the Hawaiian sugar industry.

First of
all, there was the beginning of the industry.  Sugar was first planted on an industrial
scale in Koloa (Kauai) in the 1830s.  This was done by Ladd &
Company.

I would say that the American Civil War was
another big event.  This caused the exports of sugar from Hawaii to the United States to
skyrocket.  Of course, they also fell when the war ended, so it was not a permanent
thing.

I don't know if you would count this as having to do
with the sugar industry, but the importation of workers to work in the plantations had a
huge impact on Hawaii as a whole.  The huge Asian population of the islands (as well as
the Pidgin that so many locals speak) comes from all the importation of labor from
Japan, China, the Philippines and other places.

Perhaps the
most important event was the 1876 Reciprocity Treaty with the US.  This let Hawaiian
sugar into the US untaxed and led to a huge boom in trade.  You could argue that this
led pretty directly to the US annexation of the islands in the 1890s (I would say the
annexation was connected to the sugar industry too).