Navigation Links
April grafting optimal for Fraser fir
Date:12/30/2010

RALEIGH, NC Christmas trees provide a significant source of revenue in southern Appalachia, resulting in millions of dollars in sales during the holiday buying season. The most popular species in the region is fraser fir, appreciated for its fragrance and consumer-friendly traits such as soft needles, strong branches, exceptional needle retention, and natural Christmas tree shape. Frasers, indigenous to isolated high-elevation mountains in southwestern Virginia, western North Carolina, and eastern Tennessee, are under attack by a pathogen called Phytophthora cinnamom, an insidious adversary that causes root rot, kills seedlings, and threatens serious economic losses for the region's Christmas tree industry. "Once a growing site is infested, the pathogen is nearly impossible to eradicate. Fir seedlings often die within 2 or 3 weeks from infection", noted John Frampton, a professor in the Department of Forestry and Environmental Resources at North Carolina State University. To develop planting stock that is resistant to or tolerant of Phytophthora cinnamomi, some growers in the southern Appalachian Mountains are turning to grafting practices, predominantly grafting fraser fir scions onto rootstocks of resistant momi or turkish fir. To aid growers in the region seeking effective grafting techniques, Frampton and his team designed a study, implemented by graduate student Haley Hibbert-Frey, to compare success rates of the traditional April grafting time with eight summer/early fall grafting dates. The study, published in HortScience, contains important recommendations for tree growers.

Fraser fir is usually grafted in April when the rootstock and scion are dormant. But spring is a busy time for growers, who would welcome the flexibility of performing grafting at other times of the year (e.g., late summer or early fall). The NCSU study compared success and growth of grafting fresh fraser fir scions onto turkish fir rootstocks during the traditional April grafting window with eight biweekly grafting dates from mid-July through mid-October. The scientists also assessed the effect of shade and irrigation treatments on graft success and growth and evaluated grafting during the mid-July through mid-October season using dormant fraser fir scions collected during April and stored at 𔂿 C.

The team concluded that the effect of grafting date was significant for graft success. Grafting during April when scions were dormant and rootstocks were just becoming active yielded a noteworthy 95% success rate; graft success was significantly lower for the first three summer grafting dates and was unsuccessful from August 24October 20. "April graft success was 95% but when grafting fresh scions in summer/fall, graft success decreased from 52% in July to 0% in October. To ensure optimal grafting success, grafting should be performed in the late winter or early spring when scions are dormant and the rootstocks are becoming active", recommended Frampton.

The experiment results showed that shade improved summer graft success (52% with shade, 38% without), while irrigation did not significantly affect graft success or subsequent growth. In a supplemental storage study, grafting of stored scion material in summer/early fall was not successful (less than 1%). "Until more successful techniques can be developed, it is prudent to graft fraser fir in early spring with freshly collected dormant scion material", the researchers concluded.


'/>"/>

Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert  

Related biology news :

1. Pharma and food thought leaders set to converge in Amsterdam next April
2. Latino Theater Company Presents Dementia Starting April 29
3. Nobel laureates to speak at NAS Annual Meeting April 26
4. Science returns to Capitol Hill spotlight at April 14 exhibition
5. Story tips from the US Department of Energys Oak Ridge National Laboratory April 2010
6. CCNY symposium April 23 to explore future of physics
7. American Chemical Societys weekly PressPac -- April 29, 2009
8. American Chemical Societys Weekly PressPac -- April 22, 2009
9. American Chemical Society Weekly PressPac -- April 15, 2009
10. American Chemical Society Weekly PressPac -- April 8, 2009
11. Down to Earth carbon science: Briefing April 15 in DC
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
April grafting optimal for Fraser fir
(Date:2/1/2016)... YORK , Feb. 1, 2016  Today, the ... Association (AHA) announced plans to develop a first of ... computing power of IBM Watson. In the first application ... AHA, IBM (NYSE: IBM ), and Welltok will ... and health assessments with cognitive analytics, delivered on Welltok,s ...
(Date:1/27/2016)... CHESTER, Ohio , Jan. 27, 2016  Rite ... supplier based in West Chester, Ohio ... their award winning service staff, based in ... technical capacity and ability to provide modifications, installations and ... John Dovalina , CEO of PLUS, commented, "PLUS has ...
(Date:1/22/2016)... DUBLIN , January 22, 2016 ... has announced the addition of the  ... to their offering. --> ... of the  "Global Behavioral Biometric Market ... --> Research and Markets ( http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ...
Breaking Biology News(10 mins):
(Date:2/10/2016)... 2016  The Maryland House of Delegates and House ... University of Maryland School of Medicine Dean E. ... Maryland Medical System President and CEO Robert Chrencik ... highest honor given to the public by the leader ... Reece and Mr. Chrencik for their contributions to ...
(Date:2/10/2016)... Feb. 10, 2016  IsoRay, Inc. (NYSE MKT: ISR), ... and medical radioisotope applications for the treatment of prostate, ... announced its financial results for the second quarter and ... 2015. --> --> ... of fiscal 2016, which ended December 31, 2015, a ...
(Date:2/10/2016)... (PRWEB) , ... February 10, 2016 , ... ... attend the International Society of Pharmaceutical Engineering (ISPE) Rocky Mountain Chapter 21st Annual ... is expecting to fill more than 100 tables for its annual event, which ...
(Date:2/10/2016)... ... February 10, 2016 , ... Curoverse ... Azure. On Azure, Arvados provides capabilities for managing and processing genomic and health ... Azure from major institutions collecting and analyzing genomic data,” said Adam Berrey chief ...
Breaking Biology Technology: