Plant Growth Regulator – Cotton

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)CottonTo prevent shedding of flower squares & bolls
(3 sprays at 15 days interval from square formation stage
10-20 ppm.222-444
ml
1000 ltr.
Gibberellic Acid 0.001%LCottona) First spray 40-45 DAP
b) Second spray: At the time of ball formation
0.018gm180 ml450-500
Gibberellic Acid 0.186% SPCottonto improve  fiber  quality one spray at square formation or
early flowering stage
142ppm.71 gm450-500
Mepiquat chloride 5% ASCottonsingle spray at flowering stage to Control of  excessive vegetative growth and to increase crop yield in cotton50-62.5
gm
1.0-1.25
ltr
500-60057
Sodium Para –Nitrophenolate 0.3% SLCottonFlower bud initiated stage and fruit set stage0.5%5ml80016
Triacontanol 0.05% ECCottonTo increase the yield
Three sprays at 45, 65 and 85 days after planting
0.125 gm0.25ltr400-500
Triacontanol 0.05%w/w min. GRCottonTo increase the yield
Broadcast & mix the desired quantity of granules in soil 2-3 days before sowing.
12.5 gm25 kg.
Triacontanol 0.1% EWCottonTo increase the yield
Three sprays at 45, 65 and 85 days after planting
0.25 gm0.25 ltr.400-500
Cyclanilide 2.10% w/w +Mepiquat Chloride 8.40% w/w SCCottonFirst spray should be applied at square formation stage or after 45-55 days of sowing. 2nd and 3rd spray should be applied at an interval of 15 days.4.40 +17.60
to
4.95 +19.80
gm
200 – 22550021
Chlormequat Chloride 50% SLCotton (American)Square formation of early flowering (one spray)20-40 gm
a.i/ha
40-80
ml/ha
High Volume 375-600
Low volume
125-187
Chlormequat Chloride 50% SLCotton (Deshi)Square formation of early flowering (one spray)75 a.i. gm/ha150 ml/haHigh volume
375-600