Orange tree has pest or blight

Question

A few leaves on my orange tree have this.

What is this? What can I do about it?

Answer 1

I agree with Ed that this is most likely to be a cottony mealybug.

• You can control this taking a paper towel soaked in dish soap and water and wiping the leaves down.
• Repeat for every leaf with the symptoms. Check the axils where the leaves join the stems too.
• After the treatment rinse or spray with water to prevent a soapy buildup
• repeat every five to seven days for at least three times
• continue to monitor as mealybug is hard to get rid of
• move the tree away from any other houseplants. Some adult mealybugs have wings and fly to spread the population.
• check for other plants that may have it too