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Growth of Crops in Soils after Herbicidal Treatments for Brush Control in the Tropics 1
Author(s) -
Bovey R. W.,
Miller F. R.,
DiazColon J.
Publication year - 1968
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1968.00021962006000060029x
Subject(s) - picloram , sorghum , agronomy , crop , psidium , biology , phytopharmacology , mulch , soil water , chemistry , horticulture , pesticide , ecology
Herbicides 4‐amino‐3,5,6‐trichloropicolinic acid (picloram), a 1:1 mixture of the butyl esters of 2,4‐dichlorophenoxyacetic acid and 2,4,5‐trichlorophenoxyacetic acid (2,4‐D:2,4,5‐T), and a 2:2:1 mixture of the isooctyl esters of 2,4‐D:2,4,5.T:picloram at 6.7, 26.9, and 16.8 kg/ha (6, 24, and 15 1b/A) respectively, were applied as foliar sprays to control guava ( Psidium guajava L.). Six crop species were planted in soil collected from each plot, 1, 2, 3, 6½, 9½, and 13½ months after treatment, to detect herbicide residues and to determine crop tolerance. Corn, sorghum, wheat, rice and cotton could be grown without reduction in fresh weight as early as 3 months after application. Soybeans were the most susceptible crop to herbicide residues.