Life Sciences Commons^™

Nutritive Evaluation Of Warm-Season Grasses In Connecticut, R.W. Taylor, D.W. Allinson

Storrs Agricultural Experiment Station

No abstract provided.

Function Of Mentzelia Nuda (Loasaceae) Postfloral Nectaries In Seed Defense, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

Mentzelia nuda is a coarse, short-lived perennial of the High Plains of North America. The flowers secrete nectar which serves as an attractant for pollinating bees. Postfloral nectar secretion attracts ants whose presence significantly enhances seed set. This is the first demonstration of advantage to postflowering activity of a floral nectary.

Comparative Water Relations And Photosynthesis Of Mycorrhizal And Non-Mycorrhizal Bouteloua Gracilis H.B.K. Lag Ex Steud., Michael F. Allen, William K. Smith, Thomas S. Moore Jr., Martha Christensen

Department of Plant Pathology: Faculty Publications

The rangeland grass, Bouteloua gracilis was inoculated with its mycorrhizal symbiont, Glomus fasciculatus, to determine the influence of vesicular-arhuscular mycorrhizae on water status, stomatal behaviour and photosynthesis as well as gross plant morphology, biomass and phosphorus content. Mycorrhizal infection increased transpiration rates by over 100% with 50 to 70% lower leaf resistances to water vapour diffusion. Leaf xylem pressure was not different between mycorrhizal and non-mycorrhizal plants indicating that whole-plant resistance to water transport was reduced by more than 50%. Photosynthetic rates under saturating light conditions increased 68% with infection as a consequence of a 33% reduction in stomatal …

Influence Of Phosphate Source On Vesicular-Arbuscular Mycorrhizae Of Bouteloua Gracilis, Michael F. Allen, James C. Sexton, Thomas S. Moore Jr., Martha Christensen

Department of Plant Pathology: Faculty Publications

Non-mycorrhizal and vesicular-arbuscular mycorrhizal Bouteloua gracilis infected with Glomus fasciculatus were grown in defined media containing different phosphate sources and compared with respect to phosphate content and form, biomass, chlorophyll concentration, and root phosphatase activity. The phosphate sources were sodium monobasic phosphate, a mixture of sodium monobasic phosphate and calcium phytate, and calcium phytate. Inositol and inositol plus calcium were added to the sodium phosphate medium as additional treatments. Mycorrhizal infection was highest in roots of plants grown in the presence of phytate (75%). Lower root infection levels were noted in plants from the sodium phosphate (19%) and mixed phosphate …

Effects Of Reduced Tillage And Multiple Cropping On Plant Diseases, Donald R. Sumner, Ben Doupnik Jr., M. G. Boosalis

Department of Plant Pathology: Faculty Publications

In the past, tillage research on plant diseases was concerned primarily with practices that buried plant residues in single-crop production systems. The burial of plant debris to destroy pathogens is an ancient agricultural prac­ tice (34). Each crop was tested as a single entity, and most crop rotations were based on one crop per year. Interest in notill and conservation tillage systems and mUltiple cropping has increased in the past two decades be­ cause of the scarcity and increased cost of fossil fuels, periodic world food shortages, and the concern over soil erosion (73,110). These concerns are of such paramount …

Spring 1981 Conference Issue, Ruth S. Zak, Daniel Hillel, Joseph Troll

Turf Bulletin

1. Fifty Years of Turf Management Education at the University of Massachusetts (page 3)
2. Commentary: A Case for Conditional Optimism (7)
3. Fiftieth Annual Turf Conference and Fifth Industrial Show (10)
4. Dollar Spot Fungicide Trials --1980 (12)
5. Tree News (14)
6. Insurance Requirements (16)
7. UMass Turfgrass Research Fund (18)
8. Exams (19)

Summer 1981, Ellery L. Knake, T. L. Larry, J. F. Wilkinson, R. H. Miller, Carol A. Lembi, Ted Horton, Horace Ames

Turf Bulletin

1. Editorial (page 3)
2. Results of Field Test to Study Human Exposure to 2,4,5,-T Application (4)
3. Investigation and Treatment of Localized Dry Spots on Sand Golf Greens (6)
4. Aquatic Weed Control- In Review (11)
5. Golf Course Superintendent - A Perspective (14)
6. Four Seasons Ground Maintenance (16)

Fall 1981, Patricia J. Vittum, Dan Paulson Jr., Bob Early, Elmer R. Fleck

Turf Bulletin

1. Turf Clippings (page 3)
2. Registration of Oftanol^R (Isofenphos) (4)
3. Effect of pH Organic Matter and Solid Texture on Herbicides (6)
4. Lawn Care: Big Potential for Fluids

Cover Of Plants With Extrafloral Nectaries At Four Northern California Sites, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

Percent cover of plants with extrafloral nectaries was investigated in three California habitats with the same physiognomy as habitats previously studied in Nebraska (perennial native grassland, riparian forest, deciduous forest). In contrast to Nebraska where cover of plants with extrafloral nectaries reached 14 percent, no plants with extrafloral nectaries were found in any California transect. Chaparral was also studied; no plants with extrafloral nectaries were found.

Field Maps 1981, Grace K. Attea, Ryan W. Mcewan, John L. Vankat

Data Files

Historical field map scans (1981) for the permanent 100m x 105m research plot in Hueston Woods State Nature Preserve.

Maps were digitized in 2022.