Efficacy of Atrazine based Post-Emergence Herbicide Mixtures on  Weed Dynamics and Maize (Zea mays L.) Productivity in Sub-Humid  Southern Plain of Rajasthan

Sari. Pengendalian gulma dengan menggunakan herbisida tunggal bila dilakukan terus menerus akan menimbulkan gulma resisten. Pencampuran herbisida perlu dilakukan untuk menanggulanginya. Campuran herbisida dengan dua atau lebih jenis bahan aktif dapat bersifat sinergis, aditif, atau antagonis. Tujuan dari penelitian adalah untuk mengetahui sifat campuran herbisida Atrazin 500 g/L + Mesutrion 50 g/L terhadap beberapa jenis gulma dominan pada tanaman jagung. Percobaan dilaksanakan pada bulan November 2018 sampai Januari 2019, di Rumah Kaca Fakultas Pertanian Unpad, Jatinangor. Perlakuan terdiri dari tiga jenis herbisida dengan enam tingkat dosis, yaitu herbisida tunggal Atrazin (1200, 600, 300, 150, 75, 0 g/ha), Mesotrion (120, 60, 30, 15, 7,5, 0 g/ha) dan campuran herbisida dari Atrazin 500g/L dan Mesotrion 50 g/L (1056, 528, 264, 132, 66, 0 g/ha) dengan empat ulangan. Gulma target adalah gulma A. conyzoides, S. nodiflora, C. rotundus, dan E. indica. Analisis data menggunakan analisis regresi linear dan metode MSM untuk menentukan LD50 perlakuan dan LD50 harapan. Hasil percobaan menunjukkan bahwa pencampuran herbisida berbahan aktif Atrazin 500 g/L dan Mesotrion 50 g/L memiliki nilai LD50 perlakuan (85,11 g/ha) lebih kecil dari nilai LD50 harapan (86,9 g/ha) sehingga dapat disimpulkan sifat campuran herbisida tersebut bersifat sinergis.Kata kunci : Atrazin, Mesotrion, Herbisida campuran, Gulma dominan tanaman jagung Abstract. Weed control by using a single herbicide continuously will cause weeds resistant, so it is necessary to mix herbicides. Mixture of herbicide with two or more types of active ingredient can be synergistic, additive, or antagonistic. The objective of this research is to know the effect of herbicide mixture of Atrazin 500 g/L and Mesotrion 50 g/L to several types of dominant weeds. The research was conducted from November 2018 until January 2019, at the Green house of Faculty of Agriculture, Padjadjaran University, Jatinangor. The treatment was consisted of three types of herbicide with six level of doses. There were herbicide Atrazine 500 g/L (1200, 600, 300, 150, 75,0 g /ha), Mesotrion 50 g/L (120, 60, 30, 15, 7.5, 0 g/ha) and herbicide mixtures Atrazine 500 g/L and Mesotrion 50 g/L (1056, 528, 264, 132, 66, 0 g/ha) with four replications. The target weeds were A. conyzoides, S. nodiflora, C. rotundus and E. indica. Data was analyzed by linear regression and MSM method to determine the value of LD50 treatment and LD50 expectation. The results showed that herbicides mixture of Atrazine 500 g/L and Mesotrion 50 g/L had a value of LD50 treatment 85.11 g/ha which is smaller than the value of LD50 expectation (86.9 g/ha), this indicating that the herbicide mixtures was synergistic.Keywords: Atrazine, Mesotrion, Mixed herbicides, dominant weeds of corn

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Short-term impacts of soil nutrient management on maize (Zea mays L.) productivity and weed dynamics along a toposequence in Eastern Zimbabwe

Heliyon ◽

10.1016/j.heliyon.2020.e05223 ◽

2020 ◽

Vol 6 (10) ◽

pp. e05223

Author(s):

Justin Chipomho ◽

Joyful T. Rugare ◽

Stanford Mabasa ◽

Shamie Zingore ◽

Arnold Bray Mashingaidze ◽

...

Keyword(s):

Zea Mays ◽

Nutrient Management ◽

Zea Mays L ◽

Soil Nutrient ◽

Short Term ◽

Weed Dynamics

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Weed Dynamics in Maize (Zea mays L.) as Influenced by Pre and Post-emergence Herbicides under Temperate Conditions of Western Himalayan Region

Asian Journal of Agricultural Extension Economics & Sociology ◽

10.9734/ajaees/2020/v38i1030438 ◽

2020 ◽

pp. 123-131

Author(s):

Faisul-ur- Rasool ◽

M. I. Bhat ◽

Z. A. Dar ◽

S. A. Hakeem ◽

S. Nasseer ◽

...

Keyword(s):

Zea Mays ◽

Sodium Salt ◽

Field Experiments ◽

Zea Mays L ◽

Block Design ◽

Research Station ◽

Randomized Block Design ◽

Significant Difference ◽

Weed Dynamics ◽

Hand Weeding

Field experiments were conducted in 2017-18 during main cropping seasons of the year 2017 and 2018 at Dryland (Karewa) Agriculture Research Station, SKUAST-K to determine the effect of different post and pre emergence herbicides application on weed dynamics in maize (Zea mays L.). The experiment was laid out in randomized block design with four replications and variety used was Bio-605. Five treatments Five treatments viz, Atrazine 50% WP @ 1.0 kg ha-1 as pre-emergence and Paraquat dichloride 24% SL @ 0.5 kg ha-1, 2,4-D sodium salt 58% WSC @ 1.0 kg ha-1 as post-emergence herbicides (application at 2-3 leaf stage of weeds), hand weeding as standard check and weedy check as control were used. Effect of different herbicides on weed density was found significant. in plots managed with hand weeding, no weed was recorded. The Atrazine treated plots @ 1.0 kg ai ha-1 as pre-emergence had the weed population of 5.51, 5.4, 3.73, 5.12, 4.28 and 41.4m-2 , respectively in Echinochloa spp., Eleusine indica, Digitaria sanguinalis, Amaranthus viridis, Sorghum halepense and Cyperus spp. However, the maximum population of weeds was recorded in weedy check with 21.54 m-2, 20.87 m-2, 19.16 m-2, 21.5 m-2, 16.7 m-2 and 60.7 m-2. No significant difference was observed between Paraquat dichloride 24% SL @ 0.5 kg ai ha-1 and 2,4- D Sodium salt 58% WSC @ 1.0 kg ai ha-1 except for Cyperus spp. with density of 51.37 m-2 and 43.04 m-2 respectively. The potential of the atrazine in controlling weeds thereby enhancing yield of maize was found in this study.

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