to the NGA adenium forum
what is your geographic location ?
I believe part of the problem is nutritional - and part is watering
lack of sufficient water sometimes causes "wrinkled" leaves at emergence - leaves may appear like a "cluster", or a better analogy, like an "accordion", with folds stacked on each other .... sometimes the leaves unfold, and sometimes remain in a "folded / accordion" state -
this may cause cracks in the leaves & stems releasing a clear sap ...turning to amber, eventually to black
this actually pretty common for plants exiting dormancy
with regular watering that should clear up
nutritional -
Check your fertilzer -
other than the 3 primary nutrients: nitrogen (N), phosphorus (P), and potassium (K) ...
also having the 7 micronutrients: boron (B), copper (Cu), iron (Fe), chloride (Cl), manganese (Mn), molybdenum (Mo) and zinc (Zn)
all fertilizers contain NPK ...not all fertilizers contain the micronutrients ...
consider using a second fertilzer on a occasional basis
lack of the micronutrient: boron .... will cause bud drop ....
yellowing of leaves is often caused by the lack of iron
As for insect control ...consider using an insecticidal soap -
