Herbicide-Resistant Invasive Plant Species Ludwigia decurrens Walter

Abstract

Ludwigia decurrens Walter is a dicotyledonous plant belonging to the family Onagraceae. It is native to Central Eastern USA but has been spreading quickly and has naturalized in aquatic and riparian ecosystems (including rice paddy fields) in many countries; therefore, it is now considered an invasive noxious weed. L. decurrens is highly competitive with rice and causes a significant reduction in rice production. The objective of the present study was to evaluate the efficacy of the herbicide penoxsulam for the control of L. decurrens in rice fields. The seeds of L. decurrens were collected from four villages in Indonesia, and penoxsulam was applied to L. decurrens in seven dosages (0, 2.5, 5, 10, 20, 40, and 80 g a.i. ha−1) 3 weeks after seed sowing. The plant populations from Hegarmanah, Jatisari, and Joho showed complete mortality at the recommended dosage of penoxsulam (10 g a.i. ha−1). However, the plants from Demakan grew, flowered, and produced seeds 56 days after treatment with 40 g a.i. ha−1 of penoxsulam. The resistance index value of the population was 36.06. This is the first report of a penoxsulam-resistant weed from a dicotyledonous plant species and also the first report of a herbicide-resistant population of L. decurrens. The appearance of herbicide-resistant L. decurrens is a serious issue from both an environmental and an economic perspective, especially since protected forest and freshwater ecosystems are located at a short distance from the study area. Further research is needed to evaluate herbicide mixtures and/or the rotation of herbicide action sites. The identification of the penoxsulam-resistance mechanism in L. decurrens is also necessary to develop a herbicide resistance management strategy.

Insecticidal Potentials and Identification of Bioactive Compounds from Extracts of Bacopa Floribunda and Ludwigia Decurrens Plants

“…Scholars have reported that L. decurrens reduces the development of rice plant tillers, panicles, leaves, and spikelets, according to Pessu and Umeozor [19]. As a result, there is a considerable likelihood of an economic impact due to poorer crop yields and quality [20]. The Scrophuliaceae family includes Bacopa floribunda.…”

Respon Pertumbuhan Dan Hasil Kentang Var. Cingkariang Dan Populasi Gulma Terhadap Isolat Rizobakteri Indigen

“…Aplikasi herbisida dapat menekan pengaruh negatif gulma pada tanaman kentang (Barbaś et al 2020;Jabran et al 2023;Kalkhoran et al 2021). Akan tetapi penggunaan herbisida terus menerus dan dalam jangka waktu yang panjang dapat menyebabkan timbulnya resistensi gulma terhadap herbisida (Kurniadie et al 2021;Piasecki et al 2020;Rahmadi, 2021;Vulchi et al 2022), gangguan kesehatan lingkungan (He et al 2019;Hong et al 2022;Kwonpongsagoon et al 2021), bahkan dapat membahayakan organisme non target seperti koloni lebah (Macri et al 2021) dan organisme laut (Matozzo et al 2020;Sylwestrzak et al, 2021).…”