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Effects of plant growth regulators and other compounds on flow of latex in Hevea brasiliensis
Author(s) -
ABRAHAM P. D.,
BOATMAN S. G.,
BLACKMAN G. E.,
POWELL R. G.
Publication year - 1968
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1968.tb03859.x
Subject(s) - hevea brasiliensis , paraquat , biology , yield (engineering) , benzoic acid , chloride , horticulture , botany , food science , organic chemistry , biochemistry , chemistry , natural rubber , materials science , metallurgy
SUMMARY Eighty‐nine compounds have been tested for their ability to promote the flow of latex from Hevea brasiliensis after tapping. The twenty‐four substances which showed significant activity were: twelve chloro‐ and fluoro‐phenoxy alkylcarboxylic acids substituted in the 4‐, 2, 4‐ and 2, 4, 5‐ positions, two chlorinated benzoic acids, α‐ and β‐naphthaleneacetic acid, 3‐indolylacetic acid, 2‐methoxy‐4‐diethylamino‐6‐isopropylamino‐1, 3, 5‐ triazine (methoxy‐ipazine), N,N ‐diallyl‐α‐chloroacetamide (CDAA), 1,1′‐dimethyl‐4,4′‐bi‐pyridilium‐2A (paraquat), neomycin, dichloro‐ m ‐xyienol, and phenyl mercury acetate and chloride. Despite the many replications the high variability of the yield data does not allow of a precise classification of the relative activities. The most active compounds were 2, 4‐dichloro‐5‐fluorophenoxyacetic acid and 2, 4, 5‐trichlorophenoxyacetic acid (2, 4, 5‐T), although 2, 4‐dichlorophen‐oxyacetic acid (2, 4‐D) gave increases in yield comparable to those of 2, 4, 5‐T in some of the trials.