Potential Suppression Effects of Aqueous Extracts of Selected Plants on Growth of Carrot Weed (Parthenium hysterophorus L.) in Arusha, Tanzania

This study investigates the potential suppression effects of aqueous extracts derived from selected plants on growth carrot weed (Parthenium hysterophorus L.) in Arusha, Tanzania. The research aimed to explore natural and sustainable methods for managing proliferation this invasive species. Through a series laboratory experiments, were prepared specific namely amaranth (Amaranthus spinous L.), neem (Azadiratchta indica wheat millet (Sorghum bicolor), marigold flower (Tagetes erictus L.). tested against pot experiment their effectiveness inhibiting germination seeds under controlled conditions. Leaf at 25, 50, 100% concentrations sprayed four eight-week seedlings P. hysterophorus. Distilled water was used as control. highest percentages 95.5% 93.33% control treatment T. extract leaf respectively. Results showed that all plant indicated high inhibition rate Due increasing concentrations, 25 100%. However, concentration more effective used. Four weeks susceptible foliar sprays compared with eight seedlings. These findings highlight using locally available develop eco-friendly strategies infestations region. Further is warranted identify isolate active compounds responsible observed effects. contributes knowledge management practices underscores importance exploring nature-based solutions agricultural challenges Tanzania beyond.