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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1996_vol50.pdf#page=117
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Kim, T. J.;
Neal, J. C.;
DiTomaso, J. M. |
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| Author Affiliation: | Grad. Res. Asst. and Assoc. Professor, Dept. Orn. Hort., Cornell Univ., Ithaca, NY; Asst. Professor, Dept. Vegetable Crops, University of California, Davis, CA |
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| Title: | Distribution and Adaptation of Crabgrass species in the U. S. |
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| Meeting Info.: | Williamsburg, VA; January 2-5, 1996 |
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| Source: | Proceedings of the 50th Annual Meeting of the Northeastern Weed Science Society. Vol. 50, 1996, p. 117. |
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| Publishing Information: | College Park, MD: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Crabgrass control; Cultivar evaluation; Cultivar profile; Cultivar variation; Digitaria ciliaris; Digitaria ischaemum; Digitaria sanguinalis; Geographical distribution
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| Abstract/Contents: | "Among the 60 species in the genus, Digitaria, thirteen weedy species infest the United States, but large (Digitaria sanguinalis), smooth (Digitaria ischaemum) and southern crabgrass (Digitaria ciliaris) are the most common. Despite the avilability of effective herbicides and continued control efforts , these species continue to be troublesome in most crop areas, and especially in turf. In order to control crabgrass more efficiently, we need to understand the biological and psycological factors which contribute to its success as a weed. The first step in understanding crabgrass adaptation is to document itts distribution geographically and among cropping systems. We conducted a survey to investigate the geographical distribution and the adaptation in cropping systems of crabgrass species in the United States. In 1995, 117 survey forms were sent to 2 or 3 weed scientists in each state, except for Hawaii. The questions included: 1)which is the most important species in each cropping system of each state, 2) what factors limit the adaptation and distribution of the crabgrasses, and 3) is ther any substantial intraspecific variation in crabgrass such as different growth habits, flowering time or phenotypes, etc. We received 72 completed surveys, a 62% return rate. In the United States, crabgrasses are considered to be important in turf areas and less important in other crops. Generally both large and smooth crabgrass existed together in the most regions, with smooth crabgrass more abundant in northern than in southern regions. Southern crabgrass exsisted with large crabgrass in several southern areas including Mississippi, Texas, and Georgia, with a few reports of smooth crabgrass in these regions. In Maine, the far northern area, only smooth crabgrass was reported, whereas in Florida, the deep southern region, no large or smooth crabgrass are found, but southern blanket (D. serotina) and india crabgrass (D. longiflora) were reported. Most respondants believed that the temperature, light and moisture conditions were important in limiting the adaptation and distribution of the species. There were few respondants indicating intraspecific variations of smooth and large crabgrass, but both southern and blanket crabgrass were reported to have some intraspecific variation. These results suggest several questions: is smooth crabgrass more tolerant to low temperature than large, and vice versa to high temperature; is there any correlation between temperature and light conditions with survival and adaptation of these species; and why are crabgrasses more successful in turf than in other crops. In order to develop long-term and environmentally sound crabgrass management strategies, these questions must be addressed." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kim, T. J., J. C. Neal, and J. M. DiTomaso. 1996. Distribution and Adaptation of Crabgrass species in the U. S.. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 50:p. 117. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1996_vol50.pdf#page=117
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 610 .N62 v. 50 |
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