Plant Sciences Commons^™

Eryngium Prostratum In Central Virginia, W. John Hayden

Biology Faculty Publications

While visiting Pocahontas State Park in Chesterfield County, Virginia during the fall of 1984, an unfamiliar blue-flowered plant was observed growing near the upper reaches of Swift Creek Lake. This proved to be Eryngium prostratum Nuttall ex DC., a species common near bodies of water in the southeast U.S. While several standard floras include Virginia in the distribution of this plant (Fernald 1950, Gleason 1952, Gleason & Cronquist 1963, Radford et al 1968, Godfrey & Wooten 1981), the only counties for which it is recorded in Harvill et al (1981) are along the extreme southern border of the state, i.e., …

Frontiers In Plant Science: Transcripts From A Symposium Sponsored By The Minnesota Academy Of Sciences, Gretchen Hagen, David D. Biesboer

Journal of the Minnesota Academy of Science

No abstract provided.

Fungicides For Control Of Pythium Ultimum On Greenhouse-Grown Geraniums, Nancy L. Olson, F. L. Phleger

Journal of the Minnesota Academy of Science

Subdue 2E applied by drench at 18.7 ppm to soil inoculated with Pythium ultimum and in which rooted cuttings of geranium had been planted, was found to be free of the fungus during the test period of 30 days and caused no injury to the plants. Banrot 40W at 240 ppm and Truban 25E at 145 ppm were only slightly fungistatic.

Ultrastructure Of Flagellated Chrysophytes. Iv. Chrysosphaerella, Daniel E. Wujek

Journal of the Minnesota Academy of Science

Information on the fine structure of naturally occurring cells of Chrysosphaerella brevispina and C. longispina is given and some new data are presented. The ultrastructure is generally typical for the Chrysophyceae although both perinuclear cisternae and cytoplasmic endobiotic bacteria occur. A paraflagella rod occurs in the photoreceptor area of the short, second flagellum. Siliceous scale and bristle origin are illustrated.

Spring 1985, Chris Beasley, James Beard, Robert N. Carrow, Chuck Wilson

Turf Bulletin

1. The New England Sod Industry (page 3)
2. New Trends and Research in Turfgrass Culture (5)
3. Fifty-Fourth Annual Turf Conference and Ninth Industrial Show
4. Irrigation Programming (13)
5. Landscape Development in Large Residential Communities (17)

Extrafloral Nectaries On Plants In Communities Without Ants: Hawaii, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

Since the Hawaiian Islands lack native ants, it was hypothesized that extrafloral nectaries, an ant-related mutualistic trait, should be lacking on native species. Presence of extrafloral nectaries (EFNs) on plants was determined by direct observation and related to vegetation structure and floral composition. Frequency of plants with EFNs was low by all possible comparisons. However, several endemic species had functional EFNs. The hypotheses to explain these anomalies are (1) phylogenetic inertia or (2) mutualism with some other organism than ants.

Blueberry Advisory Committee Research Report, H Y. Forsythe Jr, Jeffrey Holmes, F L. Caruso, M G. Zuck, John M. Smagula, Edward J. Mclaughlin, Jeff Risser, Mike Goltz, Dana Nelson, Sharon Roberts, Judy Gates, Moody F. Trevett, Tom Cs Yang, David E. Yarborough, Antonia L. Hoelper, D C. Emerson

Wild Blueberry Research Reports

The 1984 edition of the Blueberry Progress Reports was prepared for the Maine Blueberry Commission and the University of Maine Blueberry Advisory Committee by researchers with the Maine Agricultural Experiment Station and Maine Cooperative Extension Service at the University of Maine, Orono. Projects in this report include:

1. Control, biology, and ecology of insects affecting lowbush blueberries .

2. Chemical control of mummyberry disease (Monilinia vaccinii-corymbosi)

3. New Fungicides for control of Botrytis blossom blight

4. Nutritional survey of selected lowbush blueberry fields

5. Interaction of fertility and pruning practices on soil characteristics and lowbush blueberry growth and …

Beating The Blackberry, J H. Moore, E. B. Hoskins

Journal of the Department of Agriculture, Western Australia, Series 4

The blackberry is an aggressive, strongly-growing plant that has spread throughout parts of the south-west of Western Australia.

Although most blackberry infestations on agricultural land have been dramatically reduced since compulsory control measures were introduced 30 years ago, about 3,600 hectares are still infested today.

Recent research has shown that three new herbicides are highly effective against blackberry, and much safer to use than the older ones.

Effective biological control of blackberry may also be possible.

Some Effects Of Viterra 2 Hydrogel On Soil Physics And Plant Growth, Julia E. Maserang

Masters Theses

The effects of hydrogel on various aspects of plant growth and soil physics were determined for Tagetes patula (marigold) and Vinca rosea growing in 'PRO-MIX' soilless potting medium.

The addition of hydrogel at various concentrations to the potting medium increased the water-holding capacity of the medium, thus extending the hours-to-wilt of plants growing in this medium. While hydrogel had no effect on plant height, flowering time, plant color, soil pH or soil nitrate concentration, plant weight and flower number did appear to increase between the control and highest hydrogel treatment. As hydrogel concentration within the medium increased, percent total seed …