Different POST-em Herbicide Programs for Weed Management in Lowland Flooded Rice System in North Macedonia
Journal
Yuzuncu Yil University Journal of Agricultural Sciences
Date Issued
2023-03-31
Author(s)
Zvonko PACANOSKI & Arben Mehmeti
DOI
https://doi.org/10.29133/yyutbd.1041068
Abstract
he 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-(EPOST-em),
mid-(MPOST-em) and late-(LPOST-em) rice growth stages (BBCH 26; 29 and
32-34, respectively). Weed control varied among herbicide treatments, herbicide
programs, and weeks after treatments (WAT). All herbicides applied EPOST-
em controlled Echinochloa crus-galli (ECHCG) and Scirpus maritumus
(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 (BBCH 40). Control level of Cyperus
rotundus (CYPRO) and Heteranthera reniformis (HETRE) was high in all
POST-em treatments (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.
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-(EPOST-em),
mid-(MPOST-em) and late-(LPOST-em) rice growth stages (BBCH 26; 29 and
32-34, respectively). Weed control varied among herbicide treatments, herbicide
programs, and weeks after treatments (WAT). All herbicides applied EPOST-
em controlled Echinochloa crus-galli (ECHCG) and Scirpus maritumus
(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 (BBCH 40). Control level of Cyperus
rotundus (CYPRO) and Heteranthera reniformis (HETRE) was high in all
POST-em treatments (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.
Subjects
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