WEED MANAGEMENT IN RICE UNDER SPRINKLER AND FLOOD IRRIGATION SYSTEMS

被引：0
|
作者：
Helgueira, D. B. [1 ]
Rosa, D'Avila T. [1 ]
Galon, L. [2 ]
Moura, D. S. [1 ]
Martini, A. T. [1 ]
Pinto, J. J. O. [1 ]
机构：
[1] Univ Fed Pelotas UFPel, Capao Do Leao, RS, Brazil
[2] Univ Fed Fronteira Sul, Erechim, RS, Brazil
来源：
PLANTA DANINHA | 2018年 / 36卷
关键词：
Clearfield system; Oryza sativa; persistence; IMAZETHAPYR; SOIL; DEGRADATION; PERSISTENCE; CARRYOVER;
D O I：
10.1590/S0100-83582018360100141
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
This study aimed to assess the efficiency and selectivity of herbicides in rice submitted to sprinkler and flood irrigation systems. The experimental design was a randomized block design arranged in a 2 x 9 factorial scheme. Factor A consisted of irrigation systems (sprinkler and flood) and Factor B consisted of herbicide treatments (T1 - control; T2 - imazethapyr + imazapic, 75 + 25 g a.i. ha(-1); T3 - imazethapyr + imazapic, 150 + 50 g a.i. ha(-1); T4 - imazapic + imazapyr, 73.5 + 24.5 g a.i. ha(-1); T5 - imazapic + imazapyr, 147 + 49 g a.i. ha(-1); T6 - imazethapyr, 106 g a.i. ha(-1); T7 - imazethapyr, 212 g a.i. ha(-1); T8 - sequential application of imazethapyr + imazapic, 75 + 25 g a.i. ha(-1); and T9 - sequential application of imazapic + imazapyr, 73.5 + 24.5 g a.i. ha(-1)). The application of imazethapyr and formulated mixtures of imazethapyr + imazapic and imazapyr + imazapic provided a control higher than 97% in flood and sprinkler irrigation systems. Herbicide selectivity is not altered in the sprinkler irrigation system when compared to the flood irrigation system.
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页数：9
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