Q.Angel Trumpets
I am seeing yellow coloration on Angel Trumpet plant. Also the leaves are getting eaten by something. I don’t find any bugs visually.

Downtoearthdigs
Answered on June 23, 2017
Pests are often small and difficult to see.
I would treat the plant with Neem Oil.
https://www.gardeningknowhow.com/ornamental/vines/trumpet-vine/bugs-on-trumpet-vines.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
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