What's on my jasmine leaves?

I can't be 100 percent sure that I'm seeing this correctly in the picture but it is possible your jasmine has a fungus called leaf spot- which is not too serious and might mean your jasmine just needs some proper fertilizer. If it's more powdery, then it could be powdery mildew which can be treated with a baking powder-water spray.

Looks like mealy bug. Repot the plant and spray with down with horticultural oil making sure you cover all sides of the leaves.

Dab the mealybugs with a cotton ball swab soaked in rubbing alcohol to dry the insects out. Wash the plant with a gentle detergent and water to help control mealybugs. Spray the indoor plant with an oil spray or soap spray. These sprays will suffocate or dry out the mealybugs and kill them.

How to Control Mealybugs on Indoor Plants: 7 Steps (with Pictures)

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Yes I think it is mealybug, spray with white oil available from plant supplier. It will smother the bugs, dig around the base of trunk of plant as they often go under the soil there so spray there too. If it were my plant I would spray to kill the bugs then repot getting rid of most of the existing soil and use a good potting mix. Feed with sea sol fertilizer so plant can recover from the shock of all the treatment. Hope this helps.

IN HIGH SCHOOL, 41? YEARS AGO. WE HAD AN ASSIGNED GREEN HOUSE FOR HORTICULTURE. WE HAD TO USE NATURAL THINGS TO REMEDY PROBLEMS. WE MADE STRONG TEA AND SPRAYED THEN WIPED THE PLANTS. THEN TORE OPEN THE TEABAGS AND MIXED THE OLD TEA INTO THE SOIL. WORKED GOOD. (SORRY FOR LARGE TYPE. VISUALLY IMPAIRED)

I can't see anything clearly enough in your photo's to offer assistance, but I can say the plant doesn't look happy. My suggestion is that you cut off a section. Seal it in a plastic bag and take it to your local garden centre and they will be able to help.

I just spray mine with dawn dishwashing liq. and water. Clears them right up

Thanks everyone, sorry for delayed replies, I was bit busy .

I am just wondering average for baking soda and water ? I am planning for re-poting too. I have another question to ask all of you to how can I grow more plant from this one? Thanks,