Effect of Two Herbicides on Xenylla Welchi (Hexapoda:Collembola) Under Laboratory Conditions
Xenylla welchi was used to evaluate toxicity of two herbicide formulations, pretilachlor (50 EC) and pendimethalin (30 EC) under laboratory conditions. Twenty four hours LC 50 value of pretilachlor and pendimethalin formulations on Xenylla welchi were 72.7 and 190.0 g a.i/ha respectively which were...
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Published in | Bulletin of environmental contamination and toxicology Vol. 86; no. 6; pp. 583 - 586 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer-Verlag
01.06.2011
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Xenylla welchi
was used to evaluate toxicity of two herbicide formulations, pretilachlor (50 EC) and pendimethalin (30 EC) under laboratory conditions. Twenty four hours LC
50
value of pretilachlor and pendimethalin formulations on
Xenylla welchi
were 72.7 and 190.0 g a.i/ha respectively which were less than their corresponding recommended agricultural doses. Again pretilachlor attained fastest LT
50
(110 min) followed by pendimethalin (140 min). Significant reductions in hatching success were noted with the application of both the herbicide formulations at all doses excepting 1/
8
and
1
/
10
th of LC
50
(9.1, 7.3 and 23.8, 19.0 g a.i/ha for pretilachlor and pendimethalin, respectively). Hatching success of the test specimens recorded 44.1 and 63.3% reduction from control for the highest applied dose (½ of LC
50
) of pretilachlor and pendimethalin, respectively. Juveniles of
Xenylla welchi
exposed to
1
/
6
,
1
/
8
and
1
/
10
th LC
50
for pretilachlor (12.1, 9.1, 7.3 g a.i/ha) and
1
/
8
and
1
/
10
th LC
50
for pendimethalin (23.8, 19.0 g ai/ha) survived and exhibited increased moulting frequency (7 moultings in 28 days in both the herbicide treatments) in comparison to control (8 moulting in 42 days). Test specimens required 26.0 ± 1.2 and 28.1 ± 2.1 days to attain sexual maturity exposed to pretilachlor and pendamethalin respectively which was significantly less than control (42 ± 2.6 days). |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0007-4861 1432-0800 |
DOI: | 10.1007/s00128-011-0277-0 |