The Influence of Herbicide Underdosage on the Composition and Diversity of Weeds in Oilseed Rape (Brassica napus L. var. oleifera D.C.) Mediterranean Fields

Deligios, Paola A.; Carboni, Gianluca; Farci, Roberta; Solinas, Stefania; Ledda, Luigi

doi:10.3390/su11061653

Cited by 8 publications

(4 citation statements)

References 82 publications

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“…Compounds containing nitro groups have been studied as photosynthesis inhibitors, for example, compound 5, which is an inhibitor of carbon dioxide fixation (21) as well as compound 6, which blocks electron transport at the quinone B level by interacting at the D1 protein (22). In addition, the commercial herbicides pendimethalin (7) and trifluralin (8) inhibit root and shoot growth (23,24). Furthermore, herbicidal activity has been reported for a number of amide derivatives as photosynthetic electron transport inhibitors (9-11) (25)(26)(27) as well as for naptalam (12) which inhibits both basipetal auxin transport and root elongation ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Rational Design, Synthesis and Evaluation of Indole Nitrogen Hybrids as Photosystem II Inhibitors

Souza

Fazolo

Lacerda

et al. 2020

Photochem & Photobiology

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We report the synthesis of twelve indole derivatives bearing nitro or amide groups via Fischer indole methodology followed by reduction/acetylation and amidation reactions. After thorough characterization, these indoles were subjected to a number of studies in order to evaluate their bioactive potential as photosynthesis and plant growth inhibitors. Firstly, these molecular hybrids were evaluated as photosystem II (PSII) inhibitors through chlorophyll a (Chl a) fluorescence measurement. In this study, 6‐chloro‐8‐nitro‐2,3,4,9‐tetrahydro‐1H‐carbazole (15a) and 5‐chloro‐2,3‐dimethyl‐7‐nitro‐1H‐indole (15b) showed the best results by reducing the phenomenological parameters of reaction centers ABS/RC, TR0/RC and ET0/RC of PSII. Electron chain blockage by these compounds may lead to diminished ATP synthesis and CO2 fixation which interrupt the plant development. The compounds 15a and 15b both act as postemergent herbicides, reducing the dry biomass of Ipomoea grandifolia and Senna alata weeds by an average of 40% and 37%, respectively, corroborating the fluorescence results. Additionally, the molecular docking study revealed that the presence of strong electron‐withdrawing groups at the indole phenyl ring is important for the ligand’s interaction with the binding pocket of protein D1 on PSII. The optimization of these molecular features is the goal of our research group in further understanding and development of new potent herbicides.

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Section: Introductionmentioning

confidence: 99%

Rational Design, Synthesis and Evaluation of Indole Nitrogen Hybrids as Photosystem II Inhibitors

Souza

Fazolo

Lacerda

et al. 2020

Photochem & Photobiology

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“…Kelimpahan biji gulma di dalam tanah juga menjadi salah satu faktor penting dan penentu eksistensi suatu spesies gulma, keberlangsungan hidup, dan dominansi gulma pada suatu ekosistem. Kelimpahan biji gulma tersebut dipengaruhi berbagai faktor seperti pengelolaan lahan (Cabrera-Pérez et al, 2022;Pinke et al, 2022;Rahman et al, 2012) dan aplikasi herbisida dalam praksis budidaya tanaman (Comeau & Fraser, 2018;Deligios et al, 2019;Gazola et al, 2022;Idziak & Woznica, 2020). Perubahan komposisi gulma yang tumbuh juga dipengaruhi oleh cara olah tanah (Chaniago et al, 2023).…”

Section: Dominansi Gulmaunclassified

Efikasi herbisida Thiencarbazone-methyl+isoxaflutole terhadap pengendalian gulma dan hasil tanaman (Zea mays L.)

Chaniago,

Ardi,

Hariandi

et al. 2023

J. AGRO

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Maize is a second important food crop, its yield is the raw material for the feed industry. As for other crops, maize can not avoid weed association and interference. Weed may cause farmers’ economic loss. An experiment to determine the efficacy of thiencarbazone methyl+isoxaflutole herbicide and its effects to control weeds and maize yield was conducted from October 2022 to February 2023 at Ultisol of Universitas Andalas, Limau Manis, Padang. The experimental units were laid out according to a completely randomized block design (CRBD) with 10 treatments and three replications. The treatment was different types of weed control namely: no weeding, various doses of herbicide thiencarbazone-methyl 90 g L-1+isoxaflutole 225 g L-1 i.e 250 mL ha-1, 300 mL ha-1, 350 mL ha-1, and 400 mL ha-1 applied at 2 and 10 DAP, respectively, and manual weeding. Herbicide thiencarbazone-methyl 90 g L-1+isoxaflutole 225 g L-1 effectively controlled Erechtites valerianifolia, Oxalis barrelieri, and Asplenium rhizophyllum. Herbicide at 350 mL ha-1 applied dose at 2 DAP reduced weed dry weight per m-2 as much as 93% at 6 WAP. Weed control by herbicide application increased 72.20% of maize yield per ha compared to the no-weed-control treatment group without causing phytotoxicity on maize plants.ABSTRAK Tanaman jagung merupakan tanaman pangan penting kedua dan menjadi bahan baku industri pakan. Seperti tanaman lainnya, tanaman jagung juga tidak dapat terhindar dari interaksi dan asosiasi dengan gulma. Keberadaan gulma pada pertanaman jagung dapat menimbulkan kerugian ekonomis. Penelitian dilakukan untuk mengetahui pengaruh efikasi herbisida thiencarbazone-methyl+isoxaflutole yang diaplikasikan pada waktu berbeda terhadap pengendalian gulma dan hasil tanaman jagung telah dilaksanakan pada bulan Oktober 2022 sampai Februari 2023 pada tanah ultisol kampus Universitas Andalas Limau Manis, Padang. Penelitian dilaksanakan menggunakan rancangan acak kelompok (RAK) dengan 10 perlakuan dan 3 ulangan. Perlakuan adalah tanpa pengendalian gulma, berbagai dosis herbisida thiencarbazone-methyl 90 g L-1+isoxaflutole 225 g L-1 yaitu 250 mL ha-1 , 300 mL ha-1 , 350 mL ha-1 , dan 400 mL ha-1 yang masing-masing diaplikasikan pada 2 dan 10 HST, dan pengendalian gulma secara manual. Herbisida thiencarbazone-methyl 90 g L-1+isoxaflutole 225 g L-1 dosis 250 hingga 400 mL ha-1 efektif mengendalikan gulma Erechtites valerianifolia, Oxalis barrelieri, dan Asplenium rhizophyllum. Herbisida dosis 350 mL ha-1 diaplikasikan 2 HST menurunkan hingga 93% bobot kering gulma m-2 pada 6 MST. Pengendalian dengan herbisida dapat meningkatkan hasil jagung per ha sebesar 72,20% dibandingkan perlakuan tanpa pengendalian gulma tanpa menimbulkan gejala fitotoksisitas pada tanaman jagung.

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“…Agrichemicals may shift the vegetation whose presence are important for the existence of other species (Comeau and Fraser 2018;Deligios et al 2019), including soil macrofauna. Excessive use of herbicides affects plant and animal performance and may influence trophic interactions such as herbivory and pollination (Ruuskanen et al 2023).…”

Section: Soil Macrofaunamentioning

confidence: 99%

Soil macrofauna diversity and weed dynamics in response to different methods of weed control in smallholder rubber farming

CHANIAGO,

YULISTRIANI,

UMAMI

et al. 2023

Biodiversitas

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Abstract. Chaniago I, Yulistriani, Umami IM, Bukhari ZZ. 2023. Soil macrofauna diversity and weed dynamics in response to different methods of weed control in smallholder rubber farming. Biodiversitas 24: 3106-3113. Weeds interference in rubber farmland may reduce latex yield. Farmers apply herbicides to control weeds. However, the herbicide not only controls weed but also affects the presence of soil macrofauna. A study has been conducted to determine the effect of different method of weed control on soil macrofauna and weeds at smallholder rubber farming at Pulau Punjung, Dharmasraya District, West Sumatra, Indonesia. The experiment was conducted in a completely randomized block design with 6 treatments and 4 pseudo-replications. Treatment was mechanical control, without weed control, and 4 doses of herbicide glyphosate+metsulfuron-methyl (1.5 L ha-1 + 15 g ha-1, 2 L ha-1 + 15 g ha-1, 2.5 L ha-1 + 15 g ha-1, 3 L ha-1 + 15 g ha-1) with 400 L ha-1 of volume. Pitfall traps were used to collect the soil macrofauna. Data were analysis with ANOVA for weed and soil macrofauna in response to different methods of weed control. Results demonstrated that the application of glyphosate+metsulfuron-methyl herbicide significantly suppressed weeds higher than that of other methods of weed control (p<0.05). Para grass (Brachiaria mutica (Forssk.) Stapf) was the most dominant weed but has been affected most by 3 L ha-1 + 15 g ha-1 herbicide mixture. Soil macrofauna of the order Hemiptera was affected most by the application of herbicide with a total reduction of 71.58% of number of individuals at 12 weeks after application of herbicide. In general, different weed control methods resulted in varied numbers of orders and individuals of the soil macrofauna.

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The Influence of Herbicide Underdosage on the Composition and Diversity of Weeds in Oilseed Rape (Brassica napus L. var. oleifera D.C.) Mediterranean Fields

Cited by 8 publications

References 82 publications

Rational Design, Synthesis and Evaluation of Indole Nitrogen Hybrids as Photosystem II Inhibitors

Rational Design, Synthesis and Evaluation of Indole Nitrogen Hybrids as Photosystem II Inhibitors

Efikasi herbisida Thiencarbazone-methyl+isoxaflutole terhadap pengendalian gulma dan hasil tanaman (Zea mays L.)

Soil macrofauna diversity and weed dynamics in response to different methods of weed control in smallholder rubber farming

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