questions: asking about the control measure of flower dropping in mango. 
 answers: details given(naa @ 20 ppm is sprayed at flowering to increase the fruit retention.  during february 0.5% urea (5 g/lit.) or 1% potassium nitrate (10g/lit.) may be sprayed to induce flowering, if trees do not flower by that time. spraying of 2% kno3 at mustard size will increase the fruit set and retention of fruits.)