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Full-Text Articles in Life Sciences
Rediscovery Of Halesia Diptera Ellis (Styracaceae) In Arkansas, Raymond G. Erickson
Rediscovery Of Halesia Diptera Ellis (Styracaceae) In Arkansas, Raymond G. Erickson
Journal of the Arkansas Academy of Science
No abstract provided.
Allelopathic Observations In Rice (Oryza Sativa L.) To Ducksalad (Heteranthera Limosa), R. H. Dilday, Paolo Nastasi, Roy J. Smith Jr.
Allelopathic Observations In Rice (Oryza Sativa L.) To Ducksalad (Heteranthera Limosa), R. H. Dilday, Paolo Nastasi, Roy J. Smith Jr.
Journal of the Arkansas Academy of Science
More than 50 weed species infest drill-seeded rice in the U.S. and one of the most prevalent aquatic weeks is ducksalad (Heteranthera limosa). During the summer of 1988, a field experiment was conducted to identify rice accessions from the USDA/ARS rice germplasm collection for allelopathic effects to ducksalad. In this field experiment, 5,000 accessions were evaluated for allelopathic activity. Five to seven seeds of each rice accession were planted in hills about 75cm apart in two replications. Allelopathic activity was recorded as 1) radius of the area affected by allelochemical from the base of the rice plant and 2) percentage …
Floristic Notes On The Arkansas Cruciferae (Brassicaceae), Edwin B. Smith
Floristic Notes On The Arkansas Cruciferae (Brassicaceae), Edwin B. Smith
Journal of the Arkansas Academy of Science
No abstract provided.
Preliminary Evaluation Of A Dodder Anthracnose Fungus From China As A Mycoherbicide For Dodder Control In The Us, D. K. Cartwright, George E. Templeton
Preliminary Evaluation Of A Dodder Anthracnose Fungus From China As A Mycoherbicide For Dodder Control In The Us, D. K. Cartwright, George E. Templeton
Journal of the Arkansas Academy of Science
Dodder (Cuscuta spp.) is a noxious, parasitic, annual weed throughout most of the United States. A fungus used to control it in China was imported under permit for studies with U.S. dodder species in containment. The fungus, Colletotrichum gloeosporioides, sporulated on liquid and solid media at room temperature. Conidia from 7-12 day old cultures were diluted to 3.5 to 7 X 16⁶ spores ml^-1 for host range inoculations. Germination on water agar at 24 hrs was higher at 28 than 30 or 24 C. Inoculated plants were exposed to dew periods of 12-1 4 hrs at 24 or 28 C, …
Reproduction Of Lindera Melissafolia In Arkansas, Robert D. Wright
Reproduction Of Lindera Melissafolia In Arkansas, Robert D. Wright
Journal of the Arkansas Academy of Science
Field reproduction was investigated in several populations of the endangered dioecious species Lindera melissifolia. Fruit set was light and erratic, and even where fruiting was heavy no effective seed bank was found. Field transplantation of greenhouse-grown seedlings was successful for one growing season. Rhizome sprouting was widespread, and produced rapid recovery from fire. Without enhancement of natural reproduction, the species will probably decline.