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Approaches to managing invasive plants is challenging, particularly in protected areas where conventional methods, such as chemical herbicide applications are limited. We studied the effects of varying densities of  Cynodon dactylon  on the growth and development of the invasive weeds  Tagetes minuta  and  Gutenbergia cordifolia  in northern Tanzania. We conducted pot and field plot experiments following a completely randomized block design that was replicated three times. Increasing densities of  C. dactylon  significantly reduced growth, leaf total chlorophyll, biomass and significantly increased leaf anthocyanin of both  T. minuta  and  G. cordifolia  invasives. Our results further showed that the critical density of  C. dactylon  to suppress the two invasive species is ≥ 8 plants/m 2 . We suggest that  C. dactylon  can successfully be used as an alternative eco-friendly and sustainable approach for managing invasive weeds, such as  T. minuta  and  G. cordifolia . This management technique can additionally improve forage production and biomass for wild and domestic herbivores in the affected areas.

Can Cynodon dactylon Suppress the Growth and Development of the Invasive Weeds Tagetes minuta and Gutenbergia cordifolia?