Navigation Links
Methyl bromide alternatives for California strawberry nurseries
Date:2/17/2009

SALINAS, CASince around 1960, methyl bromide (MB) has been the foundation for soilborne disease and weed control in California strawberries. MB, classified as a Class I stratospheric ozone-depleting chemical, has been phased out since 2005, but is still being used in strawberry production under a critical-use exemption.

Strawberry production is important to California's economy; the state leads the U.S. in strawberry production. In 2006, the fruit harvest yielded a value of $1.2 billion, and accounted for 79% of the total U.S. gross sales.

The diversity of climates in California along with the use of this fumigant, permits the production of high-quality runner plants, which are propagated in virus-free growing facilities called "screenhouses". Plants are reared first in a low-elevation facility during the warm early season, and then moved to higher-elevation facilities for cool, late-summer conditions. This process ensures that strawberry plants will be ready to transplant into fruit fields by early fall.

A research study published in the American Society for Horticultural Science journal HortScience evaluated the effectiveness and cost efficiency for weed control in lower- and higher-elevation nurseries with MB-alternative fumigants.

Researchers Steven A. Fennimore, Milton J. Haar, Rachael E. Goodhue, and Christopher Q.Winterbottom noted that weed control in strawberry nurseries is more difficult than in fruiting fields. "Because weed control methods such as mulches used in fruit fields can't be used in nurseries, fumigants are one of the most important weed control tools available for strawberry nursery fields", the team explained.

Assessing weed control in the study consisted of three methods: weed seed viability, weed density counts, and timing of hand-weeding inputs by crews. Strawberry and weed seed samples were treated with the alternative fumigants to determine the potential for strawberry and weed seed to survive in the nursery fields. Fumigant effectiveness was studied in fields treated with the combination of MB plus Pic, iodomethane (IM) plus Pic, and control fields. Additional treatments tested were 1,3-dicloropropane (1,3-D) plus Pic followed by dazomet, and Pic followed by dazomet. Overall, there were few to no differences in weed control between IMPic, 1,3-D Pic followed by dazomet, Pic followed by dazomet, and MBPic. Relative to the control fields, hand-weeding times were reduced in all fields that had been fumigated.

The main difference between fumigating with the different methods was material cost. The researchers explained that, because current prices were used to calculate hand weeding and treatment costs, these prices will change over time and may become more equitable given different circumstances.

The study results showed that that fumigating with MB is currently much cheaper than using IM. On the basis of weed control, all of the alternative fumigant treatments were acceptable replacements for MB.


'/>"/>

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

Related biology news :

1. Methyl bromide alternatives indicated for North Carolina tomato production
2. Stowers Institutes Workman Lab discovers novel histone demethylase protein complex
3. Methylmercury warning
4. DNA methylation shown to promote development of colon tumors
5. Parasite-resistant peppers green alternatives to chemical pesticides
6. Alternatives to ozone-depleting pesticide studied
7. Government, Industry Leaders Come Together to Explore Technology Alternatives to Border Fence for Security, Surveillance
8. New version of Google Earth features Californias marine protected areas
9. Study shows Californias autism increase not due to better counting, diagnosis
10. California study shows shade trees reduce summertime electricity use
11. Forest inventories in California include more than trees
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Methyl bromide alternatives for California strawberry nurseries
(Date:4/28/2016)... Sweden , April 28, 2016 First ... M (139.9), up 966% compared with the first quarter of 2015 ... profit totaled SEK 589.1 M (loss: 18.8) and the operating margin ... 7.12 (loss: 0.32) Cash flow from operations was SEK ... The 2016 revenue guidance is unchanged, SEK 7,000-8,500 M. ...
(Date:4/15/2016)... CHICAGO , April 15, 2016  A ... companies make more accurate underwriting decisions in a ... offering timely, competitively priced and high-value life insurance ... health screenings. With Force Diagnostics, rapid ... and lifestyle data readings (blood pressure, weight, pulse, ...
(Date:3/31/2016)... 2016   LegacyXChange, ... "Company") LegacyXChange is excited to release its ... to be launched online site for trading 100% guaranteed ... will also provide potential shareholders a sense of the ... an industry that is notorious for fraud. The video ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... --  Ginkgo Bioworks , a leading organism design ... awarded as one of the World Economic Forum,s ... innovative companies. Ginkgo Bioworks is engineering biology to ... in the nutrition, health and consumer goods sectors. ... including Fortune 500 companies to design microbes for ...
(Date:6/24/2016)... ... ... While the majority of commercial spectrophotometers and fluorometers use the z-dimension of 8.5 ... end machines that use the more unconventional z-dimension of 20mm. Z-dimension or ... the cuvette holder. , FireflySci has developed several Agilent flow cell product lines ...
(Date:6/23/2016)... ... 2016 , ... UAS LifeSciences, one of the leading manufacturers ... Probiotics, into Target stores nationwide. The company, which has been manufacturing high quality ... list of well-respected retailers. This list includes such fine stores as Whole Foods, ...
(Date:6/23/2016)... , June 23, 2016 A person commits ... the crime scene to track the criminal down. ... U.S. Food and Drug Administration (FDA) uses DNA evidence to ... Sound far-fetched? It,s not. The FDA has ... to support investigations of foodborne illnesses. Put as simply as ...
Breaking Biology Technology: