Resin eating my yucca plant leaves??

Question

Hi, some of the leaves on my yucca plant are being consumed by something unknown – but it leaves behind a red “resin” which turns into a solid amber-like substance. The leaves are slowly dying off but I have no idea how / why / what it causing it!

Please see the images attached which should be useful.

Thanks for your help!

Joel

• 
• 
• 

Answer 1

Scales leave behind a sticky sap. Here is more information:
https://www.gardeningknowhow.com/plant-problems/pests/insects/control-plant-scale.htm

https://www.gardeningknowhow.com/ornamental/foliage/yucca/yucca-plant-bugs.htm