Weed Science (2019) 67, 214-220

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Jeffrey L. Atkinson, Lambert B. McCarty, Fred Yelverton, Scott McElroy and William C. Bridges (2019)
Doveweed (Murdannia nudiflora) response to environmental resource availability and cultural practices
Weed Science 67 (2), 214-220
Abstract: Susceptibility of a system to colonization by a weed is in part a function of environmental resource availability. Doveweed [Murdannia nudiflora (L.) Brenan] can establish in a variety of environments; however, it is found mostly in wet or low-lying areas with reduced interspecies competition. Four studies evaluated the effect of mowing height, interspecies competition, and nitrogen, light, and soil moisture availability on M. nudiflora establishment and growth. A field study evaluated the effect of mowing height on M. nudiflora establishment. In comparison with unmowed plots, mowing at 2 and 4 cm reduced spread 46% and 30%, respectively, at 9 wk after planting. Effect of mowing height and nitrogen fertilization on 'Tifway' bermudagrass (Cynodon dactylon Burtt-Davy × C. transvaalensis L. Pers.) and M. nudiflora interspecies competition was evaluated in a greenhouse trial. Murdannia nudiflora coverage was 62% greater in flats maintained at 2.6 cm than flats maintained at 1.3 cm. Supplemental application of 49 kg N ha -1 mo -1 increased M. nudiflora coverage 75% in comparison with 24.5 kg N ha -1 mo -1. A difference in M. nudiflora coverage could not be detected between flats receiving 0 and 24.5 kg N ha -1 mo -1, suggesting moderate nitrogen fertilization does not encourage M. nudiflora colonization. Effect of light availability on M. nudiflora growth and development was evaluated in a greenhouse study. Growth in a 30%, 50%, or 70% reduced light environment (RLE) did not affect shoot growth on a dry weight basis in comparison with plants grown under full irradiance; however, internode length was 28% longer in a 30% RLE and 39% longer in a 50% and 70% RLE. Effect of soil moisture on M. nudiflora growth and development was evaluated in a greenhouse study. Plants maintained at 50%, 75%, and 100% field capacity (FC) increased biomass > 200% compared with plants maintained at 12.5% or 25% FC.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Lambert B. McCarty, Fred H. Yelverton

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
control - general

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Murdannia nudiflora (weed) Cynodon (crop)