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Prevention, Early Detection, and Eradication of Benghal Dayflower in Field Nurseries

Robert H. Stamps, professor of environmental horticulture and Extension cut foliage specialist, Mid-Florida Research and Education Center

Benghal dayflower (Commelina benghalensis L.), an increasingly problematic weed, is also known as jio, tropical spiderwort, hairy wandering jew, and Indian dayflower, among other names. It is an herbaceous monocot (flowering plant that produces one seed leaf and has fibrous roots, leaves with parallel veins, and flower parts occurring in multiples of three) that is native to Asia and tropical Africa. It was first collected in the continental United States in 1928, and in 1983, it was designated a “noxious weed” by the U.S. Department of Agriculture (Faden 1993). Benghal dayflower is also listed as a noxious weed by at least nine states, including Florida. This listing means that “it is unlawful to introduce, multiply, possess, move, or release any… noxious weed, or invasive plant regulated by the department [in Florida, the Department of Agriculture and Consumer Services] or the USDA …” (Florida Administrative Code Rule 5B-57.004).

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