Plant Growth Regulator – Mango

Approved Plant Growth RegulatorCropTime of application / purposea.i. (ppm/gm/%) (Dosage per ha)Formulation (ml/gm/L tr/kg/%)Dilution In Water (Litres) / Preparation of solutionWaiting period / PHI
between last applicatio n             &
harvest (days)
Alpha Naphthyl Acetic Acid 4.5% SL (Na salt)MangoIst spray when tender fruits one of pea size. 2nd spray when fruits one of marble size(about 2 cm diameter)
To control Mango malformulation- Before fruit bud differentiations approx.3 months before flowering
20 ppm
200ppm

2 ml in 4.5litre.
20 ml in 4.5 ltrs.

Ethephon 39 % SLMangoa)For breaking alternate bearing tendencies200 ppm770-10251500-200026 ml in 10 lit of
water
Ethephon 39 % SLMangob)For Flower induction in juvenile mango1000 ppm3846-
5128
1500-20005ml in 10 lit of
water
Ethephon 39 % SLMangoc)Post-harvest treatment (For Uniform Ripening)500 ppm1923-
2564
1500-200026 ml in 10 lit of
water
Paclobutrazol 23% SC (W/W) / (25% W/V)
(Import Source:-  ZENECA Agrochemicals, Fernhurst, Haslemere, Surrey, UK)
MangoTo reduce the inter node length of new shoots and earlier formation of terminal bud. Favourably, influence the fruit bud production, fruit colour and harvest yield 7-15yrs old 16-25 yrs.old >25 yrs old Application after the harvest of fruits (Any time from July to Oct) 

15 ml. Per tree 20 ml. Per tree. 25-40 ml. Per tree (Note:     If the soil is sandy the rate of application may  be reduced  to 75 % of the recommen ded. For repeat use the  rate of application can  be  50 to 75 % of the rate used in the 1st year)Recommended quantity diluted in clean water of 5-10 lit. and applied in furrow 5 to 10 cm deep about 30 cm away from the  trunk. Fill up with soil after applicatio n or apply as soil – collar drench.
Paclobutrazol 23% SC (W/W) / (25% W/V)
(Import Source:-  PGR International Pty. Ltd.,  4 Dairy road, Werribee  Vic. 3030 Australia)
MangoTo reduce the inter node length of new shoots and earlier formation of terminal bud. increase fruit bud production, and improve fruit yield texture 16-25 yrs old Application after the harvest of fruits (Any time from July to Oct)4.0 gm per tree
16 ml. Per tree (Note:  If the soil is sandy the rate of application be reduced  to 75   %   of the recommen ded.  For repeat  use the  rate  of application can be 50  to  75 %  of  the rate  used in 1st year)Make a round furrow  about 5 to 10 cms deep at least 30 cm away from the trunk.  Mix the recommended dose with about  5-10 litres of clean water and apply to  the furrow.     Fill up   with   soil after application and     irrigate once or twice a          month subsequentlyWaiting Period-NIL as the chemical is applied 8 months before harvest of fruits
Paclobutrazol 23% SC (W/W) / (25% W/V) (Indigenous manufacture)MangoTo reduce the inter node length of new shoots and earlier formation of terminal bud. Favourably, influence the fruit bud production, fruit colour and harvest yield 7-15 yrs old 16-25 yrs old >25 yrs old Application after the harvest of fruits (Any time from July to Oct)15 ml. Per tree 20 ml. Per tree. 30 ml. Per tree (Note: If the soil is sandy the rate of application may be reduced to 75 % of the recommended. For repeat use the rate of application can be 50 to 75 % of the rate used in the 1st year)Recommended quantity diluted in clean water of 5 lit. and applied in furrow 5 to 10 cm deep about 30 cm away from the trunk. Fill up with soil after application or apply as soil – collar drench.