8 pages, via Online journal, The use of tomato (Solanum lycopersicum) grafting is gaining traction across the United States, but small-scale growers face the challenge of creating optimum postgrafting healing conditions. The practice of blocking light for a period of 2 to 4 days while maintaining high humidity is commonly recommended for healing grafted tomato transplants; however, research is exploring alternatives to this practice. The present study investigated a low-input healing method for grafted tomato transplants with a specific focus on light and the use of propagation heat mats to regulate substrate and healing chamber air temperatures during the 7-day healing process. We hypothesized that 4 days of light exclusion and the use of propagation heat mats would improve grafted tomato transplant survival and growth. ‘Cherokee Purple’ was used as the scion and ‘RST-04-106-T’ was used as the rootstock. The whole plot factor was heat [propagation mats set at 80 °F (heat) or no propagation mat (no heat)] and the subplot factor was light exclusion (0, 4, or 6 days of dark). The highest survival rate among treatments was 97% in 0 days of dark with no heat treatment; survival decreased to 84% in 4 and 6 days of dark with no heat treatments. The plant survival rate was 96% with 0 days of dark and heat treatment; however, the survival rates were 63% and 45% for the 4- and 6-day dark treatments, respectively. The scion stem diameter was largest for transplants grown in 0 days of dark, but there was no difference in stem diameter due to heat treatments. There were no differences among scion or rootstock biomasses due to heat or light treatments. These results demonstrate that propagation mats set at 80 °F to regulate the substrate temperature were detrimental to grafted transplant survival under extended periods of light exclusion. However, this finding creates the basis to explore lower levels of substrate temperature modification. Our work also indicates that light exclusion may not be necessary for healing grafted tomato plants regardless of root-zone temperature treatments. Future work should examine the interactions of various substrate and air temperatures under full light conditions and their effects on grafted tomato transplant survival and growth. This work contributes to the ongoing research of how to optimize low-input healing methods that may be readily adopted by small-scale tomato growers.
Jiggins, Janice (author / Freelance Consultant, Andelst, The Netherlands) and Freelance Consultant, Andelst, The Netherlands
Format:
Report
Publication Date:
1989-02
Published:
Canada
Location:
Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 74 Document Number: C03705
Notes:
James F. Evans Collection, Guelph, Canada : University of Guelph, Department of Rural Extension Studies, 1989. 16 p. (Occasional Papers in Rural Extension, No. 5)
Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: C14396
Notes:
Chapter 2 in Gordon Prain, Sam Fujisaka and Michael D. Warren (eds.), Biological and cultural diversity: the role of indigenous agricultural experimentation in development. Intermediate Technology Publications, London. 1999. 218 pages
Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 163 Document Number: C27070
Notes:
Posted at http://www.scidev.net > indigenous knowledge, Via Science and Development Network. 3 pages., "More should be done to build bridges between formal scientific research and informal grassroots innovations."
Page 85 in Extension Circular 532, Review of Extension Research, January through December 1959, U.S. Department of Agriculture, Washington, D.C. Brief description of an update of a document of the same title, Journal Series 2047, Missouri Agricultural Experiment Station, University of Missouri, Columbia. 1959. 20 pages.
traditional knowledge, Evans, cited reference, Although inter-cropping (IC) is widely practiced in rank that practical small -- scale agricultural and agricultural research scientist have not systematically explored. The rationale for and have rarely attempted to improve it. Instead, they have concentrated on planting crops computer stands an extension advice has been to replace. IC with peer strands. This has reduced the impact of the research and extension activities. A review of East Africa experience from the 1930s, considers reasons for the research concentration on Pier stand planting and reveals two phases one formal experiments on IC were carried out. Despite generally favorable results, neither of these lead to, including IC an extension, advised to farmers. IC can contribute to one more of five, and objectives of small-scale farmers, but the standard design of agronomic experiments at best of takes account of only one of these, so that benefits are underestimated the erroneous policy conclusions drawn the paper advocates, enter alia, bolted disciplinary research for small-scale agriculture and active participation by farmers themselves.
Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: C17322
Notes:
Paper presented at a meeting about involving farmers in the development of agricultural technology, Ouagadougou, Upper Volta, September 20-25, 1983., Pages 139-150 in Peter Matlon, Ronald Cantrell, David King and Michel Benoit-Cattin (eds), Coming full circle: farmers' participation in the development of technology. IDRC-189e, International Development Research Centre, Canada. 176 pages.