Common name gibberellic acid (BSI, draft E-ISO, accepted in lieu of a common name); acide gibbérellique (draft F-ISO)

Chemical Abstracts name: (1a,2b,4aa,4bb,*0b)*2,4a,*-trihydroxy**-methyl**-methylenegibb**-ene*1,**-dicarboxylic acid 1,4a-lactone 
Other names gibberellin A3; GA3 (ambiguous) 
CAS RN ******5

Mode of action Acts as a plant growth regulator on account of its physiological and morphological effects in extremely low concentrations. Translocated. Generally affects only the plant parts above the soil surface. 

Uses Has a variety of applications, e.g. to improve fruit setting of clementines and pears (especially William pears); to loosen and elongate clusters and increase berry size in grapes; to control fruit maturity by delaying development of the yellow colour in lemons; to reduce rind stain and retard rind ageing in navel oranges; to counteract the effects of cherry yellows virus diseases in sour cherries; to produce uniform seedling growth in rice; to promote elongation of winter celery crop; to induce uniform bolting and increase seed production in lettuce for seed; to break dormancy and stimulate sprouting in seed potatoes; to extend the picking season by hastening maturity in artichokes; to increase the yield in forced rhubarb; to increase the malting quality of barley; to produce brighter-coloured, firmer fruit, and to increase the size of sweet cherries; to increase yields and aid harvesting of hops; to reduce internal browning and increase yields of Italian prunes; to increase fruit set and yields of tangelos and tangerines; to improve fruit setting in blueberries; to advance flowering and increase the yield of strawberries; and also a variety of applications on ornamentals. Application rates up to *0 g/a per application, depending on desired effect.