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  • Author or Editor: L. A. Rupp x
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Growth of 2-year-old tart cherry (Prunus cerasus L.) trees as measured by trunk circumference increase or total shoot elongation was significantly greater in plots receiving chemical or mechanical weed control within the tree row than in plots receiving between-row cultivation only. Shoot growth of one-year-old apple (Malus domestica Borkh. ‘Delicious’) trees responded similarly to weed control. Tart cherry trees in hand weeded and dinoseb or glyphosate treated plots had greater growth than those in paraquat treated plots. Tart cherry trees in plots receiving chemical or mechanical weed control out-yielded trees in unweeded plots during the first year of production. ‘Delicious’ apple trees in plots treated with dinoseb (6.7 and 10.1 kg/ha), the high rate of glyphosate (1.7 kg/ha), or mechanical weed control also outyielded trees in unweeded plots during the first year of production. Effects of weed control on growth and yield were less distinct during the 2nd year of production. Trees from treated plots came into production one year earlier than trees in the unweeded plots. Chemical names used: 2-(1-methylpropyl)-4,6-dinitrophenol (dinoseb); N-(phosphonomethyl)glycine (glyphosate); 1,1′-dimethyl-4,4′-bipyridinium ion (paraquat).

Open Access

In response to a perceived need for the development and introduction of superior plant accessions for use in sustainable, low-water landscaping, land-grant universities in Colorado, Idaho, and Utah, have supported plant development programs. Each of these programs has unique characteristics and protocols for releasing plant materials and obtaining royalties to further support research and development. Colorado State University (CSU) is part of the Plant Select program, which evaluates and promotes native and non-native plants for use in low-water landscapes. Selected plants are released to commercial members who pay a membership fee and royalties for access to the selected plants. The University of Idaho focuses on selecting and evaluating native herbaceous perennials, which are then released through a contract and royalty program with a local nursery. Utah State University uses the Sego Supreme program to select, propagate, and evaluate native plants. Selected plants are released to interested growers who pay a royalty for production rights.

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The AG*SAT network is designed to allow sharing of instructional resources by broadcasting courses among peer institutions. In the fall of 1992 we taught the course “Landscape Management in the Interior West” by satellite over AG*SAT to students in Utah, Nevada, Nebraska, and Idaho, and on the Utah State University campus. Impetus for the course was to address the unique landscape needs of a region with few formal horticultural programs. The broadcast originated from an on-campus studio without students present, but with a two-way audio link. We encountered several unforeseen challenges during course preparation. It required a substantial time investment of approximately four hours for every hour of instruction. Marketing among peer institutions required a three-tiered consensus among faculty, deans of instruction, and telecommunication services. The initiative of peer faculty was very helpful in achieving this consensus. We were more successful in bringing the course to extension offices than to campuses. Student response varied with location and degree of involvement. On-campus students were critical of a perceived lack of face-to-face contact with faculty. Positive responses came from viewers in remote locations where access to college-level courses is otherwise limited. In lieu of personal interaction, videos and very detailed written support materials were critical in eliciting student involvement.

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