Effect of Rainfall Intensity on Glyphosate Herbicide Effectiveness in Controlling Ageratum conyzoides, Rottboellia exaltata, and Cyperus rotundus Weeds

Abstract

Glyphosate is one of herbicide active ingredient which is mostly used to control weeds in crops. However, in rain season herbicide effectiveness decreases as it is washed by rain. This research aimed to study effect of rainfall intensity on the effectiveness of herbicide (Round up 486 SL 2.5 l/ha.) with isopropilamina glyphosate as the active ingredient in controlling specific weeds Ageratum conyzoides, Rottboellia exaltata, and Cyperus rotundus. The experiment was consisted of six treatments and arranged in randomized block design with 8 replications. The treatments were level of rain intensity which were 5 mm/hour, 10 mm/hour, 20 mm/hour, 40 mm/hour, no rain and control (no herbicide no rain). Rainfall intensity was determined by conducting simulation trials prior to the treatments and applied 30 minutes after herbicide applications. The results showed that herbicide effectiveness decreased as the rainfall intensity incresed, even though with longer time the herbicide was still able to control the weeds. The effect of rainfall intensity on herbicide effectiveness was different for different weeds. Up to intensity 40 mm/hour herbicide was capable to control weeds but with level of weeds destruction 20-60%.

PENGARUH HERBISIDA OKSADIAZON 250 G/L TERHADAP PENGENDALIAN GULMA, PERTUMBUHAN DAN HASIL TANAMAN PADI SAWAH (Oryza sativa L.)

“…Curah hujan selama percobaan dari bulan Januari 2023 -April 2023 tergolong tinggi yaitu >200mm dengan rataratanya 411.305 mm Menurut Qudriyah, et.al. (2022) Curah hujan memberikan sumbangan efektif sebesar 66,8% terhadap hasil produktivitas padi karena dibutuhkan dalam memenuhi kebutuhan tanaman padi dalam menunjang pertumbuhan dan perkembangannya serta berpengaruh pada pemberian herbisida karena jika setelah pengaplikasian herbisida turun Nugraha et al,Pengaruh Herbisida Oksadiazon 250 G/L terhadap Pengendalian Gulma,Pertumbuhan dan Hasil Tanaman Padi Sawah (Oryza sativa L.) hujan, akan mengakibatkan hilangnya herbisida pada lahan percobaan yang nantinya berpengaruh terhadap hasil kefektifan herbisida pada penelitian (Saputra et al, 2020). Suhu berpengaruh dalam pertumbuhan tanaman padi namun tidak begitu berpengaruh terhadap pemberian herbisida (Jaisyurahman et al, 2020).…”

Pengaruh herbisida bentazon 400 g/l + mcpa 60 g/l terhadap gulma, pertumbuhan dan hasil tanaman padi (Oryza sativa L.)

“…Curah hujan selama percobaan berlangsung tergolong tinggi yaitu 411,3 mm. Curah hujan memiliki pengaruh yang sangat penting dalam efektivitas pemberian herbisida, jika setelah pengaplikasian turun hujan efektivitas herbisida akan turun karena terjadi pencucian oleh air hujan (Manik et al, 2020). Curah hujan juga sangat dibutuhkan untuk memenuhi kebutuhan tanaman padi dalam menunjang pertumbuhan dan perkembangannya.…”

Local Wisdom of West Timorese Farmers in Land Management

“…: Pennisetum polystachion), Rottboellia exaltata, and Bothriochloa pertusa. Cenchrus polystachion [98] and Rottboellia exaltata, especially, are annuals, which are usually cut and carried during the early wet season before they start to flower and are fed to cattle in the pen, playing an important role in fodder composition in West Timor for fattening cattle, though in many places these two annuals are considered weeds [99][100][101][102][103]. Other grasses are usually free grazed or fed to the animals by tethering them in communal native pastures.…”