My lemon tree have sticky leaves I spayed bug be gone but it is still sticky and the leaves are falling past its sell-by date? ...
Answers: What you have is probably aphids or size. These are insects with mouth parts competent of sucking the juices out of the plant. All plants produce sugar and to be exact what is being dropped on your leaves. They are in reality pooping. The stickiness is the sugar and the sugar causes the leaves to turn black do to fungus, Some insects own a protective film and this prevents the insecticide from bloodbath them. Scale are similar to turtles and have a soft shell that they cover the fern with and trademark themselves so nothing can get hold of into their shell. The best defence for these sucking insects is a systemic insecticide. This is taken into the plant and as they suck the juice they also get a blast of the insecticide. This form of insecticide is imprudent for fruit or nut trees as the insecticide gets into the fruit also. They enjoy an oil to be precise sprayed on them and they suffocate. Clean the sticky and black leaves with a mild detergent and rinse resourcefully
Could be a fungus, go to your local plant store and bring some of the leaves beside you. THey should be able to minister to.