Imazapyr herbicide efficacy on floating macrophyte control and ecotoxicology for non-target organisms

CRUZ, C.; SILVA, A.F.; SHIOGIRI, N.S.; GARLICH, N.; PITELLI, R.A.

doi:10.1590/S0100-83582015000100012

Acessibilidade / Reportar erro

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Articles • Planta daninha 33 (1) • Jan-Mar 2015 • https://doi.org/10.1590/S0100-83582015000100012 copy

Imazapyr herbicide efficacy on floating macrophyte control and ecotoxicology for non-target organisms¹ 1 Recebido para publicação em 3.10.2014 e aprovado em 19.11.2014.

Eficácia do herbicida imazapyr no controle de macrófitas flutuantes e ecotoxicologia para organismos não alvos

Authorship SCIMAGO INSTITUTIONS RANKINGS

the aims of this study were to determine imazapyr efficacy for floating macrophyte control and ecotoxicology for non-target organisms. For the floating macrophyte control efficacy tests were used the doses of 0,5; 1,0; 2,0; 2,5; 3,0; 3,5 and 4,0 L ha^-1 and a control with 10 replicates. The acute toxicology for non-target organisms was estimated by lethal concentration 50% (LC50 and EC50). The floating macrophyte control efficacy was over 90%. Imazapyr was classified as moderately toxic for the following biomarkers: L. minor, H. eques, B. rerio, P. caudimaculatus, P. canaliculata, and P. mesopotamicus and lightly toxic for A. caroliniana. Thus, imazapyr herbicide is a tool with great potential to be used on floating macrophyte control (E. crassipes, P. stratiotes e S. molesta) in Brazil and this practice can be evaluated by the use of application biomarkers.

acute toxicology; biomarkers; aquatic plants management

Dose	Days after application
(L ha^-1)	3	7	15	21	30	45	60
Mortality (%)
0.0	0	0	0	0	0	0	0
0.5	10	10	10	50	40	50	50
1.0	10	20	20	50	80	80	80
2.0	10	20	20	50	80	80	80
2.5	20	20	40	70	80	80	90
3.0	20	30	30	70	80	90	90
3.5	20	20	40	80	90	90	100
4.0	30	40	40	80	90	90	100

Dose	Days after application
(L ha^-1)	3	7	15	21	30	45	60
Mortality (%)
0.0	0	0	0	0	0	0	0
0.5	10	20	30	30	60	70	70
1.0	10	20	30	40	60	60	70
2.0	10	20	30	40	60	80	80
2.5	20	20	40	40	60	80	90
3.0	20	20	40	40	60	80	90
3.5	20	40	40	70	80	95	95
4.0	20	40	40	70	80	100	100

Dose	Days after application
(L ha^-1)	3	7	15	21	30	45	60
Mortality (%)
0.0	0	0	0	0	0	0	0
0.5	0	10	30	30	40	40	40
1.0	0	10	40	40	40	50	50
2.0	0	20	50	50	50	50	50
2.5	0	40	50	50	60	60	60
3.0	0	50	60	60	60	60	70
3.5	20	50	60	60	70	70	70
4.0	20	50	70	70	70	90	90

Biomarker	Upper Limit	CL50 and CE50	Lower limit	R²	Linear equation
L. minor	1,28	1,06	0,88	0,91	y=5,2176x + 6,0826
A. caroliniana	20,61	18,98	17,48	0,94	y=2,2333x + 0,5548
H. eques	4,23	3,93	3,68	0,92	y=53,338x – 144,46
B. rerio	5,10	4,35	3,72	0,99	y=14,295x – 3,5244
P. caudimaculatus	6,11	5,30	4,62	0,98	y=14,336x – 6,1995
P. mesopotamicus	8,34	8,19	8,06	0,93	y=88,068x – 656,38
P. canaliculata	7,14	5,89	4,86	0,91	y=7,2307x – 1,3988

Sociedade Brasileira da Ciência das Plantas Daninhas Departamento de Fitotecnia - DFT, Universidade Federal de Viçosa - UFV, 36570-000 - Viçosa-MG - Brasil, Tel./Fax::(+55 31) 3899-2611 - Viçosa - MG - Brazil
E-mail: rpdaninha@gmail.com

Acompanhe os números deste periódico no seu leitor de RSS

Brasil

Brasil

Imazapyr herbicide efficacy on floating macrophyte control and ecotoxicology for non-target organisms1 1 Recebido para publicação em 3.10.2014 e aprovado em 19.11.2014.

Eficácia do herbicida imazapyr no controle de macrófitas flutuantes e ecotoxicologia para organismos não alvos

Imazapyr herbicide efficacy on floating macrophyte control and ecotoxicology for non-target organisms¹ 1 Recebido para publicação em 3.10.2014 e aprovado em 19.11.2014.