Bitten rain lily

A new blooming rain lily bulb is bitten by the worm. Is this worm knowing prevention is better than cure, or is suiciding, or is falling in the sweet, is a question.

Reference: 

http://www.stuartxchange.org/RainLily

https://poisonousplants.cvmbs.colostate.edu/plant/80

https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:67293-1/general-information

* Four rose buds were found in the evening.