Different POST-em Herbicide Programs for Weed Management in Lowland Flooded Rice System in North Macedonia

Authors : Zvonko PACANOSKİ, Arben MEHMETİ

Pages : 150-162

Doi:10.29133/yyutbd.1041068

View : 18 | Download : 8

Publication Date : 2023-03-31

Article Type : Research Paper

Abstract :The field experiments were carried out during 2017 and 2018 on commercial rice field in Kochani region to assess different POST-em herbicide programs for weed management in lowland flooded rice system in North Macedonia. In addition, herbicide selectivity and impact on rice grain yield were estimated. POST-em herbicide treatments were used in early-insert ignore into journalissuearticles values(EPOST-em);, mid-insert ignore into journalissuearticles values(MPOST-em); and late-insert ignore into journalissuearticles values(LPOST-em); rice growth stages insert ignore into journalissuearticles values(BBCH 26; 29 and 32-34, respectively);. Weed control varied among herbicide treatments, herbicide programs, and weeks after treatments insert ignore into journalissuearticles values(WAT);. All herbicides applied EPOST-em controlled Echinochloa crus-galli insert ignore into journalissuearticles values(ECHCG); and Scirpus maritumus insert ignore into journalissuearticles values(SCMA); 91-100%. At MPOST-em treatment, herbicides showed control of ECHCG between 93 and 97%. However, all herbicides applied LPOST-em controlled ECHCG 79-88%. SCMA control was less than 88 and 85% with MPOST-em and LPOST-em treatments, respectively, perhaps as a consequence of progressive growth stage of SCMA insert ignore into journalissuearticles values(BBCH 40);. Control level of Cyperus rotundus insert ignore into journalissuearticles values(CYPRO); and Heteranthera reniformis insert ignore into journalissuearticles values(HETRE); was high in all POST-em treatments insert ignore into journalissuearticles values(between 90-100%, and 95-100%, respectively);. EPOST-em and MPOST-em application of any herbicide resulted no phytotoxicity to rice plants. LPOST-em treatments caused rice phytotoxicity by cyhalofop-butyl + penoxsulam, cyhalofop-buthyl + bentazon, and profoxidim + bentazon which were ranged from 8-20%. Unlike rice yield at LPOST-em treatments was 6235 kg ha-1, all EPOST-em and MPOST-em used herbicides has impact in rice yield 6685 and 6610 kg ha-1, respectively which, but there were no statistically significant differences with the weed free control 6710 kg ha-1.
Keywords : Herbicide, Weeds, Efficacy, Yield