Isoxaflutole·S-metolachlor 48% OD Against Annual Weeds in Maize Field: Control Effect and Safety Evaluation

doi:10.11924/j.issn.1000-6850.casb20191201011

Abstract

Abstract:

The purpose is to evaluate the control effect of isoxaflutole·S-metolachlor 48% OD against annual weeds in maize field and its safety. Field experiments were carried out with randomized-block design. The results showed that isoxaflutole·S-metolachlor 48% OD had excellent control effect on Digitaria sanguinalis, Eleusine indica, Porbulaea oleracea and Amaranthus refroflexus in maize field. 40 days after the treatment, the fresh weight of annual weeds reduced by 91.5%, 94.9% and 99.1% under 576, 720 and 1152 g a.i./hm², respectively, which were all above 90%. The maize yield increased by 16.2%, 19.0% and 21.2%, respectively. Thus, isoxaflutole·S-metolachlor 48% OD can be used in maize field by soil spraying. It is safe for maize and has good effects on annual weeds’ control and yield increase. The recommended dose is 576-720 g a.i./hm².

Key words: isoxaflutole·S-metolachlor 48% OD, maize, annual weed, control effect, safety

CLC Number:

S451.2

Li Qi, Yu Jinping, Liu Yixue, Zhang Wei. Isoxaflutole·S-metolachlor 48% OD Against Annual Weeds in Maize Field: Control Effect and Safety Evaluation[J]. Chinese Agricultural Science Bulletin, 2020, 36(34): 129-133.

Figures/Tables 4

References 21

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处理	马唐		牛筋草		马齿苋		反枝苋		合计
处理	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%
A	1.50	87.1 d	1.00	88.0 d	0.92	89.5 d	0.92	88.7 d	4.34	88.2 d
B	1.00	91.4 c	0.67	92.0 c	0.67	92.3 c	0.50	93.9 c	2.84	92.3 c
C	0.42	96.4 b	0.17	98.0 b	0.33	96.2 b	0.17	97.9 b	1.09	97.0 b
D	0.00	100.0 a	0.00	100.0 a	0.00	100.0 a	0.00	100.0 a	0.00	100.0 a
E	1.33	88.6 d	0.83	90.0 c	0.83	90.5 cd	0.75	90.8 cd	3.74	89.9 d
F	1.25	89.3 cd	0.75	91.0 c	0.75	91.4 cd	0.67	91.8 c	3.42	90.7 d
H	11.67	-	8.33	-	8.75	-	8.17	-	36.92	-

处理	马唐		牛筋草		马齿苋		反枝苋		合计
处理	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%
A	1.50	87.1 d	1.00	88.0 d	0.92	89.5 d	0.92	88.7 d	4.34	88.2 d
B	1.00	91.4 c	0.67	92.0 c	0.67	92.3 c	0.50	93.9 c	2.84	92.3 c
C	0.42	96.4 b	0.17	98.0 b	0.33	96.2 b	0.17	97.9 b	1.09	97.0 b
D	0.00	100.0 a	0.00	100.0 a	0.00	100.0 a	0.00	100.0 a	0.00	100.0 a
E	1.33	88.6 d	0.83	90.0 c	0.83	90.5 cd	0.75	90.8 cd	3.74	89.9 d
F	1.25	89.3 cd	0.75	91.0 c	0.75	91.4 cd	0.67	91.8 c	3.42	90.7 d
H	11.67	-	8.33	-	8.75	-	8.17	-	36.92	-

处理	马唐		牛筋草		马齿苋		反枝苋		合计
处理	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%
A	2.17	84.8 d	1.83	83.7 d	1.83	85.1 d	1.42	85.8 d	7.25	84.8 d
B	1.58	88.9 c	1.42	87.4 c	1.42	88.4 c	1.17	88.3 c	5.59	88.3 c
C	0.92	93.5 b	0.75	93.3 b	0.58	95.3 b	0.50	95.0 b	2.75	94.2 b
D	0.17	98.8 a	0.17	98.5 a	0.17	98.6 a	0.08	99.2 a	0.59	98.8 a
E	1.83	87.2 c	1.42	87.4 c	1.42	88.4 c	1.08	89.2 c	5.75	88.0 c
F	1.67	88.3 c	1.25	88.9 c	1.25	89.8 c	0.92	90.8 c	5.09	89.3 c
H	14.25	-	11.25	-	12.25	-	10.00	-	47.75	-

处理	马唐		牛筋草		马齿苋		反枝苋		合计
处理	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%	株数/(株/m²)	防效/%
A	2.17	84.8 d	1.83	83.7 d	1.83	85.1 d	1.42	85.8 d	7.25	84.8 d
B	1.58	88.9 c	1.42	87.4 c	1.42	88.4 c	1.17	88.3 c	5.59	88.3 c
C	0.92	93.5 b	0.75	93.3 b	0.58	95.3 b	0.50	95.0 b	2.75	94.2 b
D	0.17	98.8 a	0.17	98.5 a	0.17	98.6 a	0.08	99.2 a	0.59	98.8 a
E	1.83	87.2 c	1.42	87.4 c	1.42	88.4 c	1.08	89.2 c	5.75	88.0 c
F	1.67	88.3 c	1.25	88.9 c	1.25	89.8 c	0.92	90.8 c	5.09	89.3 c
H	14.25	-	11.25	-	12.25	-	10.00	-	47.75	-

处理	马唐		牛筋草		马齿苋		反枝苋		合计
处理	鲜重/(g/m²)	防效/%	鲜重/(g/m²)	防效/%	鲜重/(g/m²)	防效/%	鲜重/(g/m²)	防效/%	鲜重/(g/m²)	防效/%
A	20.57	87.8 c	17.45	86.9 d	16.74	88.2 d	12.10	89.4 d	66.86	88.0 d
B	16.41	90.3 b	12.09	90.9 c	12.67	91.1 c	6.08	94.7 c	47.25	91.5 c
C	11.92	92.9 b	8.55	93.6 b	4.96	96.5 b	3.06	97.3 b	28.49	94.9 b
D	1.73	99.0 a	1.21	99.1 a	0.75	99.5 a	1.14	99.0 a	4.83	99.1 a
E	19.50	88.5 c	14.82	88.9 c	17.07	88.0 d	12.21	89.3 d	63.60	88.6 d
F	18.47	89.1 bc	14.48	89.1 c	14.08	90.1 c	9.55	91.6 d	56.58	89.9 d
H	168.93	-	133.37	-	142.05	-	114.17	-	558.52	-