A wolf in sheep's clothing........!!

Visited my Mum after I finished my night shift this morning.......At 8:30am I was sitting out in her garden with a large pot of tea and a plate of hot buttered toast...❤️❤️ my Mum.
Lots of beautiful flowers, different heights and colours surround us......Well on closer inspection........Argh....!! Very pretty but friend or foe......!! Mum doesn't do internet....So out comes her book of garden pests........it's not a friend, cabbage white....Huge numbers and massive, they have stripped the plant bare......!! Plant is now only an inch tall....!!