Efektifitas Herbisida Daun Kirinyuh (Chromolaena odorata L.) Terhadap Keanekaragaman Gulma Pada Tanaman Jagung (Zea mays L.)

Rosenda, Lili Emiliya (2024) Efektifitas Herbisida Daun Kirinyuh (Chromolaena odorata L.) Terhadap Keanekaragaman Gulma Pada Tanaman Jagung (Zea mays L.). Undergraduate thesis, Politeknik Negeri Jember.

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Abstract

Various allelopathic compounds contained in the Kirinyuh plant aka Siam weed (Chromolaena odorata L.) make this plant a potential natural herbicide. However, the effectiveness of this plant as a bioherbicide needs to be studied further. This research aims to examine the effectiveness of the Kirinyuh leaves herbicide compared to synthetic herbicides containing atrazine in controlling weeds in corn plants (Zea mays L.). This field research was carried out in Jember State Polytechnic, Jember Regency, East Java in September-December 2023. Sampling used a random quadratic method at five sample points with three replications in a 1 m2 plot. Data were analyzed using SPSS, and the further data then be tested using the Mann-Whitney Test. Observations include weed species diversity (using the Shannon-Wiener index), weed species similarity index (using the Sorensen index), SDR (Summed Dominance Ratio), absolute dominance, absolute density, plant height, and fresh weight of unpeeled cobs. The results showed a moderate value of weed species diversity (1<H'<3) in both Kirinyuh herbicides (2,594) and synthetic herbicides (1,400) with a species similarity index between the two herbicides of 33%. In the SDR, the Kirinyuh herbicide area was dominated by puzzle grass while broadleaf weeds dominate the synthetic herbicide area. Meanwhile, the absolute density of weeds and the absolute dominance of weeds between Kirinyuh herbicides and synthetic herbicides did not show any significant differences. Likewise, for plant height and fresh weight of unpeeled cob, there was no significant difference between Kirinyuh and synthetic herbicides.

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