Making a Deposit - Aulacophora hilaris

Adults feed on leaves, chewing large holes. Seedlings are particularly susceptible, and so are young plants after planting out. The damage to young plants can delay crop maturity. Damage also occurs to flowers and small fruit.
The larvae probably damage roots and stems, but evidence of this has not been reported from Pacific island countries. This type of damage may allow entry of other organisms, especially fungi.

https://www.pestnet.org/fact_sheets/pumpkin_beetle_040.htm