VAPOR OF THE FREE ACID OF THE HERBICIDE 2,4-D IS TOXIC TO TOMATO AND LETTUCE PLANTS

被引:9
作者
BREEZE, VG
VANRENSBURG, E
机构
[1] Department of Agricultural Sciences, University of Bristol, AFRC Institute of Arable Crops Research, Bristol
关键词
D O I
10.1016/0269-7491(91)90001-D
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Tomato and lettuce plants were exposed to vapour of the free acid of [C-14-phenyl] 2,4-D at concentrations in the range 1-600 pg litre-1 for periods of 6, 24 or 72 h. The rate of uptake of radiolabel by tomato was about twice that by lettuce at the same vapour concentration. Uptake rates were linearly related to external vapour concentration. The relationship between uptake and vapour concentration of 2,4-D for the two species was similar to published values for the butyl and iso-octyl esters. The distribution of herbicide residue in the plant immediately after exposure indicated that the apical leaves of lettuce are particularly active in assimilating vapour, whereas for tomato, leaf position had no influence. Forty days after exposure, both species showed symptoms of toxicity and reduction in shoot dry weight typical of similar doses of 2,4-D esters. It is concluded that the vapour of 2,4-D represents a potential hazard to susceptible plants, and that further work is needed to determine the conditions likely to lead to the production of vapour of the free acids of phenoxyalkanoic herbicides following spraying.
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收藏
页码:259 / 267
页数:9
相关论文
共 8 条
[1]  
BENNET R J, 1990, South African Journal of Plant and Soil, V7, P96
[2]  
BESTE CE, 1983, HERBICIDE HDB WEED S
[3]   UPTAKE BY TOMATO PLANTS OF THE HERBICIDE [C-14] 2,4-D-BUTYL IN THE VAPOR-PHASE [J].
BREEZE, VG .
PESTICIDE SCIENCE, 1990, 29 (01) :9-18
[4]   LONG-TERM AND SHORT-TERM EFFECTS OF VAPOR OF THE HERBICIDE 2,4-D BUTYL ON THE GROWTH OF TOMATO PLANTS [J].
BREEZE, VG ;
WEST, CJ .
WEED RESEARCH, 1987, 27 (01) :13-21
[5]  
BREEZE VG, IN PRESS UPTAKE HERB
[6]  
CAMPBELL M, 1985, 1985 P BRIT CROP PRO, P289
[7]  
Que Hee S.S., 1981, PHENOXYALKANOIC HERB, VI
[8]   UPTAKE AND DEVELOPMENT OF PHYTOTOXICITY FOLLOWING EXPOSURE TO VAPOR OF THE HERBICIDE C-14 2,4-D BUTYL BY TOMATO AND LETTUCE PLANTS [J].
VANRENSBURG, E ;
BREEZE, VG .
ENVIRONMENTAL AND EXPERIMENTAL BOTANY, 1990, 30 (04) :405-414