The effect of weed management that targets the seed stage on subsequent life stages is largely unknown. Post-dispersal predation reduces number seeds from soil surface before contribute to seedbank. Density-dependent processes can mitigate in stages. In this study, we tested if (i) targeting affects seedling stage; (ii) density-dependent mortality partly compensates abundance; and (iii) magnitu...

Aplikasi herbisida dengan cara kerja menghambat Acetolactate synthase (ALS) telah dilakukan secara intensif untuk mengendalikan gulma jajagoan [Echinochloa crus-galli (L.) P. Beauv.] pada areal pertanaman padi di Sulawesi Selatan, Indonesia. Hal ini diduga menimbulkan E. yang tahan dan diperkirakan resisten terhadap natrium bispiribak. Penelitian bertujuan mengetahui resistensi tingkat Percobaa...

We compared photosynthesis and growth of Zea mays L (corn) and four weed species, Setaria viridis (L) Beauv (green foxtail), Echinochloa crus-galli (L) Beauv (barnyardgrass), Abutilon theophrasti Medic (velvetleaf), and Amaranthus retroflexus L (redroot pigweed), following foliar applications with atrazine, mesotrione, or a combination of atrazine and mesotrione in two greenhouse experiments. P...

Bioassay-directed fractionation of a CH(2)Cl(2)-MeOH (1:1) extract of the aerial parts of Flourensia cernua led to the isolation of three phytotoxic compounds, namely, dehydroflourensic acid (1), flourensadiol (2) and methyl orsellinate (3). Dehydroflourensic acid is a new natural product whose structure was established by spectral means. In addition, the known flavonoid ermanin and seven hithe...

Implications of increasing labour costs and the development of herbicide resistance for profitable weed management in Philippine rice farming systems are investigated. The study employs RIMPhil (Resistance and Integrated Management in the Philippines), a bioeconomic simulation model developed to provide a comprehensive assessment of integrated weed management programmes for the control of annua...

Aqueous leachates and a CHCl3-MeOH (1:1) extract of roots of Stauranthus perforatus showed a significant phytotoxic effect on Amaranthus hypochondriacus and Echinochloa crus-galli. Bioassay-directed fractionation of the active organic extract led to the isolation and characterization of ten secondary metabolites, which included two pyranocoumarins [xanthyletin (1) and 3-(1',1'-dimethylallyl)-xa...