Skrining Resisten pada Gulma Jajagoan (Echinochloa crus-galli) terhadap Herbisida Glifosat dan Paraquat dari Beberapa Persawahan di Kabupaten Deli Serdang

Abstract

The Echinochloa crus-galli weed is one of the main weeds in rice fields that has great potential in reducing rice productivity due to competition for water, nutrients, and light. Intensive and repeated use of herbicides over a long period of time can cause resistance in these weeds. This study aims to detect the population of E. crus-galli weeds resistant to glyphosate and paraquat herbicides from several rice fields in Deli Serdang Regency. This study was conducted at the Biotechnology Laboratory of the Faculty of Agriculture, USU, Medan, in May to June 2024 by taking weed samples at rice field locations in Deli Serdang Regency. The study used the categorization of resistant, moderate resistant, and sensitive based on the dose of Glyphosate 1080 g a.i./ha and Paraquat 200 g a.i./ha with a spray volume of 400 L/ha. The treatments tested were Glyphosate: 2.7 g a.i./L and Paraquat: 0.5 g a.i./L. Each population was sown into a petri dish as many as 50 seeds in each petri dish with 4 replications for each dose. The results showed that E. crus-galli weeds sensitive to glyphosate based on the dose category of 2.7 g a.i./L were spread in 4 locations, moderate glyphosate resistant were spread in 16 locations, but no locations became resistant in rice fields in Deli Serdang Regency while the test results with paraquat dose of 0.5 g a.i./L showed that E. crus-galli weeds sensitive to paraquat were spread in 9 locations, moderate paraquat resistant were spread in 11 locations, but no locations became resistant in rice fields in Deli Serdang Regency.