My Grammatophyllum Speciosum Is Sick. The Leafs Are Turning Yellow An Have So Kind Of Sticky Substance Under The Leaves.

Question

Is it a fungus or a bacteria? I hope you can help me.

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Answer 1

If there is a sticky substance under the leaves check for aphids or scale insects. Here is more:

https://www.gardeningknowhow.com/ornamental/flowers/orchids/treating-sticky-orchid-leaves.htm

https://www.gardeningknowhow.com/ornamental/flowers/orchids/common-orchid-problems.htm