We started some okra plants this spring. They germinated under the grow light system we have in the backroom. After the plants were about 3 weeks old, I noticed tiny clear balls collecting on the stems and leaf veins of the okra.
Never-the=less, I separated the plants and moved them to the covered porch so if something did hatch it wouldn't be loose in our house or effect other seedlings.
After a Google search I was having a hard time identifying any insect that specifically targeted okra. Then someone in a gardening forum mentioned that she had something similar going on with her okra plants and that it turned out to be dried sap balls that the plant naturally excretes.
I changed my search to "okra sap" and found many examples and photographs of the same thing I was experiencing.