Browsing by Author "Mtenga, Neema"

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Carrot-Weed: A Noxious Plant That Threatens Biodiversity in Africa
(Scientific Research Publishing, 2019-03-20) Mtenga, Neema; Tarimo, Thadeo; Ndakidemi, Patrick; Mbega, Ernest
Carrot-weed ( Parthenium hysterophorous L.) is a flowering plant of the As- teraceae family (tribe: Heliantheae). The weed became famous due to its no- torious invasive role in the environment and agricultural fields. The plant has arisen as the seventh most disturbing weed globally. In Africa, the weed is spreading very fast and information on its biology, impact, and management is scarce. Therefore, this review provides general information about the carrot weed’s current distribution status and its impact on agricultural crops, ani- mals and human health in Africa . The review also highlights areas for re- search in managing this noxious weed in the African habitats.
Developing an eco-friendly and bio-managment stratergy against parthenium hysterophorus (l.) in Arusha, Tanzania
(NM-AIST, 2019-03) Mtenga, Neema
This study aimed at studying the suppressive effects of Sorghum bicolor, Tagetes erictus Amaranthus spinous and Sorghum arundinaceum and Cassia tora on germination and development of Parthenium hysteroporus L. under controlled experiments from March 2018 to November 2018 in Arusha Tanzania. Two experiments involving seed-seed interaction and effects of plant extract on carrot-weed were established. Results showed that seeds of S. bicolor, T. erictus A. spinous and S. arundinaceum showed strong inhibition effects (p<0.001) on Parthenium hysteroporus L. seed germination, biomass, plant height and root length. Similarly, the results from the plant extracts at 25% to 100% (v/v) concentration of A. Indica, T. erictus, A. spinous and S. bicolor inhibited germination rate, shoot and root length elongation, fresh and dry biomass of Parthenium weed. These findings provides basis towards developing an effective alternative eco-friendly approach and bio-herbicide for managing Parthenium weed in Tanzania.
Potential Suppression Effects of Aqueous Extracts of Selected Plants on Growth of Carrot Weed (Parthenium hysterophorus L.) in Arusha, Tanzania
(2023) Mtenga, Neema; Mokiti, Thadeo; Mbega, Ernest; Ndakidemi, Patrick
This study investigates the potential suppression effects of aqueous extracts derived from selected plants on the growth of carrot weed (Parthenium hysterophorus L.) in Arusha, Tanzania. The research aimed to explore natural and sustainable methods for managing the proliferation of this invasive weed species. Through a series of laboratory experiments, aqueous extracts were prepared from specific plants namely amaranth (Amaranthus spinous L.), neem (Azadiratchta indica L.) wheat millet (Sorghum bicolor), and marigold flower (Tagetes erictus L.). The extracts were tested against carrot weed in the laboratory and pot experiment for their effectiveness in inhibiting the germination and growth of carrot weed seeds under controlled conditions. Lea