Plant Growth Regulator – Apple

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)
Paclobutrazol 23% SC (W/W) / (25% W/V) (Indigenous manufacture)AppleTo induce flowering and enhance yield 2.3 grm .a.i./tree 10 ml/tree5L application) Treatment should be drenched in soil Recommended as soil drench (single in circular area 25 cm away from tree stem. (Dormant stage)155
Paclobutrazol 23% SC (W/W) / (25% W/V) (Indigenous manufacture)AppleTo induce flowering and enhance yield0.46 grm .a.i/L (460 ppm)2 ml/L (2000 ppm)3L application) with the help of high volume knap sack sprayer ( at green tip stage) Recommended as foliar spray (single134
Prohexadione-Ca 10% WGAppleTwo split applications: 1st application: at 3-5 leaves/ shoot12550 gm per 100 liter250094
Prohexadione-Ca 10% WGAppleTwo split applications: 2nd application 4 weeks after 1st application15060 gm per
100 liter
250094
1-Methylcyclopropene 3.3% VP (Vapour Releasing Product)Apple fruit (Under ambient and cold condition)Applied as soon as possible after harvest, within a maximum of 7 days after harvest on fruits kept at ambient and cold temperature away from source of external
ethylene.
2.24 mg68 mg
(1000
PPB)
1