Search Results

You are looking at 1 - 10 of 157 items for :

  • Refine by Access: All x
Clear All
Full access

Melody Reed Richards, Larry A. Rupp, Roger Kjelgren, and V. Philip Rasmussen

known parameters. Also, with the exception of budding, vegetative propagation has been so difficult as to be commercially unfeasible ( Donnelly and Yawney, 1972 ; Tankersley, 1981 ). Successful introduction of any high desert native plant into the

Full access

Michael W. Smith and William D. Goff

for propagation. Suitable budwood used for patch budding can be collected while dormant for propagation in the spring or collected during the growing season ( Carroll, 2014 ; Wells, 2014 ). Dormant wood must be refrigerated and protected from

Free access

G.E. Boyhan, B.R. Abrahams, J.D. Norton, and Hongwen Huang

Detection of Xylella fastidiosa Wells et al. by enzyme-linked immunosorbent assay indicated that plums (Prunus hybrids) had higher absorbance values than peaches [Prunus persica (L.) Batsch]. The slip-budded trees had lower readings than those that were chip budded; however, the scion × method interaction was significant. Further comparison of slip vs. chip budding indicated that the lower absorbance value of slip budding occurred in plums only; there was no difference between budding methods in peach.

Free access

Simon Willacey, Gordon Patterson, and Mir Khan

The percentage of bud burst, survival and growth was influenced by the budding site and post-budding treatment. Cacao (Theobroma cacao L.) seedlings budded at the cotyledonary node performed better than those budded at the eighth node above the cotyledon. Scions patch budded at the cotyledonary node performed best if four to eight leaves were left above the bud patch and the rest of the stem excised. Poor treatments were total leaf removal and decapitation two to three inches above the bud, bending the stock plant stem and removal of the apical bud.

Free access

Bruce R. Abrahams and Joseph D. Norton

The transmission of plum leaf scald or phony peach, Xylella fartidiosa, Wells is compared by the slip and chip budding with peach and plum scions on two peach rootstocks, `Lovell' and `Nemaguard'. ELISA was used to determine mean concentrations of the bacteria in scion leaf petioles. There was a greater level of transmission of the pathogen using chip budding over slip budding in plums but not in peach. Further analysis of slip budding showed no difference to unbudded rootstocks wheras chip budding caused a significantly higher incidence of transmission.

Full access

Nadilia Gómez

Teaching grafting techniques like T-budding is challenging because learners must pay close attention to detail, observing closeups of plant structures and following specific sequences, and such attention to detail is difficult to achieve in large enrollment classes. The objective of this study was to compare the effectiveness of an instructional video vs. traditional face-to-face demonstrations to teach T-budding. A 10-minute instructional video demonstrating the steps necessary for T-budding was developed in 2001. For three consecutive years (2001, 2002, and 2003) the two methods were compared by having students see a video or receive a face-to-face demonstration, asking them to graft three buds to a root-stock and then complete a survey. Ninety students were taught T-budding with the aid of the video, and 80 students received traditional, face-to-face demos. In the survey, students were asked to evaluate the clarity of the T-budding instructions, rate the amount of help they needed from the instructor, assess the level of difficulty of T-budding, and answer two questions that tested their conceptual knowledge of T-budding. There was no difference between the two groups in the amount of time it took for students to complete the assignment and in terms of the perceived level of difficulty of the assignment. Students reported that the clarity of the face-to-face demonstrations was better than that of the video presentation, but students who saw the video obtained higher scores in the quiz than those who received a face-to-face demonstration.

Free access

Hiroshi Hamamoto and Keisuke Yamazaki

(400 to 500 nm). In our previous study ( Hamamoto et al., 2003 ), budding and flowering of perilla (Lamiaceae), Japanese morning glory (Convolvulaceae), and zinnia, cosmos, and yellow cosmos (Asteraceae) were delayed more strongly by red-light than by

Full access

Patrick Conner

than on bare ground (unpublished data). Root caliper of dormant seedlings averaged ≈2.0 cm across treatments (data not presented), and this is sufficiently large enough for whip grafting. Patch budding, however, would take place in the summer and stem

Full access

Kenneth W. Mudge, Kelly Hennigan, and Peter Podaras

An instructional system involving tropical hibiscus (Hibiscus rosa-sinensis) was developed for teaching hands-on grafting skills as part of a traditional comprehensive course in plant propagation and also as part of an online grafting course. The advantages of using tropical hibiscus include the following: the absence of phenological constraints associated with seasonal changes in temperate woody species; the comparative ease of grafting hibiscus, assuring positive reinforcement of the student's learning experience; and the ease of propagating and growing hibiscus in the greenhouse for use at any time of year. The three methods included in these laboratory exercises are top wedge grafting—selected for its ease and high rate of success—T-budding, and chip budding. In addition to development of hands-on skills, the exercises are designed to teach students three of the most important requirements for successful grafting of any species, regardless of method. These requirements include cambial alignment, application of pressure between stock and scion, and avoidance of desiccation. An online rating tutorial and lab report form was developed for students to self-evaluate their grafted plants.

Full access

Robert L. Geneve, Sharon T. Kester, Kirk W. Pomper, Jonathan N. Egilla, Cynthia L.H. Finneseth, Sheri B. Crabtree, and Desmond R. Layne

Pawpaw (Asimina triloba) is an under-exploited small tree with commercial potential as a fruit crop, ornamental tree, and source of secondary products with insecticidal and medicinal properties. It is most often propagated from seeds that are recalcitrant and must be stored moist at a chilling temperature. Seeds display combinational (morphophysiological) dormancy. Endogenous, physiological dormancy is broken by about 100 days of chilling stratification followed by a period of warm moist conditions where the small embryo develops prior to seedling emergence about 45 days after the warm period begins. Pawpaw cultivars with superior fruit characteristics are propagated by grafting onto seedling understocks. The most common practice is chip budding. Other methods of clonal propagation have proven problematic. Pawpaw can be propagated from cuttings, but only in very young seedling stock plants. Micropropagation from mature sources is not yet possible, but shoot proliferation has been accomplished from seedling explants and explants rejuvenated by induction of shoots from root cuttings of mature plants. However, rooting of microcuttings and subsequent acclimatization has not been successful.