New Film Increases California Strawberry Yields

University of California scientists have found that use of totally impermeable film in strawberry fields can improve the effectiveness of a widely-used methyl bromide alternative known as 1,3-D (1,3, dichloropropene). Use of the film reduces the amount of 1,3-D needed to maintain yields, while lowering field emissions overall.

Producing 85% of the nation’s strawberries, California growers urgently need alternatives to methyl bromide fumigation if they are to maintain yields. Methyl bromide has been phased out for all but critical uses because it depletes ozone in the upper atmosphere.

The strawberry industry is highly dependent on soil fumigation to control pests and maintain high yields. The methyl bromide alternative, 1,3-D, can be used only in certain quantities, due to air quality concerns.

In a recent trial, totally impermeable film (TIF) was laid out over Salinas fields to prevent the fumigant from leaking. The new film was compared with the standard film used by growers. Fumigant concentrations under TIF were 46% to 54% higher than under standard film, and the higher concentrations were correlated with higher strawberry yields and better weed control. Scientists report these findings in detail in the October–December 2011 electronic edition of the University of California’s California Agriculture.

Impermeable films have three benefits, according to lead author Steven Fennimore, UC Cooperative Extension specialist and weed scientist in the UC Davis Department of Plant Sciences. The films trap the fumigant in the soil for a longer time and thereby increase its effectiveness; they reduce fumigant emissions, which after reacting with nitrogen oxides can convert to ground-level ozone; and they reduce the amount of fumigant needed for effective pest control.

Emissions are a huge concern. Methyl bromide, a widely used fumigant in combination with chloropicrin, has been phased out since 2005 because it is an ozone-depleting substance targeted by the Montreal Protocol (a global treaty to control ozone depletion) and the U.S. Clean Air Act. However, it is still being used in some California strawberry fields under a critical-use exemption. Restrictions on the use of 1,3-D to 90,250 pounds per 36-square-mile township (called the township cap) leave few other options for growers in key strawberry production areas near densely populated areas.

Comparing TIF with standard film, and methyl bromide plus chloropicrin with varying amounts of 1,3-D plus chloropicrin, the scientists rated the effectiveness of TIF. The results, states Fennimore, suggest that to achieve fruit yield and weed control similar to methyl bromide and chloropicrin, 33% less 1,3-D plus chloropicrin is needed under TIF than standard films.

TIF may ease some of the burdens of fumigant regulations on end-users, as well as ease concerns of the general public about exposure to fumigants, he concludes.

Source: California Agriculture.

Leave a Reply

Featured Stories
FruitsQ&A With Penn State’s New Young Grower Alliance Coordinator
May 22, 2015
Erin Dugan recently joined Penn State University extension as a specialty crop innovations program manager and Young Grower Alliance coordinator. Read More
FruitsHow To Start A Young Grower Association
May 22, 2015
You have recently returned to your family’s business. You have friends and family you can tap for their knowledge and Read More
Tomato bug
Insect ControlStop Tomato Bugs From Sucking Your Crops Dry
May 21, 2015
Learn how to identify, the survival and spread, as well as management methods of this vegetable pest. Read More
UF/IFAS developmental biologist Dennis Gray looks at the progress of grapevines in a vineyard.
Crop ProtectionResearcher Using ‘Precision Breeding’ To Create Disease-Resistant Winegrapes
May 20, 2015
Breakthrough would mean significant savings on pesticide and fungicide sprays. Read More
Spraying indoor citrus
Protected AgricultureInterest Continues To Grow In Protected Citriculture
May 20, 2015
Inside move could put producers in prime scoring position. Read More
Expansion groundbreaking for Southwest Florida Research and Education Center
CitrusSouthwest Florida Research And Education Center Embracing New Expansion
May 20, 2015
A 7,000-square-foot addition to the UF/IFAS facility will house labs and offices for potential new faculty members. Read More
storm clouds
CitrusSouth Florida Rainy Season Could Wind Up On Drier Side
May 20, 2015
National Weather Service anticipating El Niño to play a hand in possible below-normal conditions. Read More
Food SafetyProduce Safety Alliance Offers Course To Become A Certified Trainer
May 20, 2015
The Produce Safety Alliance (PSA) has announced dates for their first two Train-the-Trainer courses this June. The first of the Read More
GrapesMatthew Fidelibus To Be Recognized For Extension Work
May 20, 2015
The American Society of Enology and Viticulture (ASEV) recently announced that Western Fruit Grower™ magazine contributor Matthew W. Fidelibus, of Read More
Apples & PearsGrants Available For Farmworker Education
May 19, 2015
Grants are available for farmworkers and their families interested in attending adult educational programs through the Washington Apple Educational Foundation Read More
The Latest
FruitsQ&A With Penn State’s New Young Grower Alliance Coo…
May 22, 2015
Erin Dugan recently joined Penn State University extension as a specialty crop innovations program manager and Young Grower Alliance coordinator. Read More
FruitsHow To Start A Young Grower Association
May 22, 2015
You have recently returned to your family’s business. You have friends and family you can tap for their knowledge and Read More
Tomato bug
Insect ControlStop Tomato Bugs From Sucking Your Crops Dry
May 21, 2015
Learn how to identify, the survival and spread, as well as management methods of this vegetable pest. Read More
UF/IFAS developmental biologist Dennis Gray looks at the progress of grapevines in a vineyard.
Crop ProtectionResearcher Using ‘Precision Breeding’ To Cr…
May 20, 2015
Breakthrough would mean significant savings on pesticide and fungicide sprays. Read More
Spraying indoor citrus
Protected AgricultureInterest Continues To Grow In Protected Citriculture
May 20, 2015
Inside move could put producers in prime scoring position. Read More
Expansion groundbreaking for Southwest Florida Research and Education Center
CitrusSouthwest Florida Research And Education Center Embraci…
May 20, 2015
A 7,000-square-foot addition to the UF/IFAS facility will house labs and offices for potential new faculty members. Read More
storm clouds
CitrusSouth Florida Rainy Season Could Wind Up On Drier Side
May 20, 2015
National Weather Service anticipating El Niño to play a hand in possible below-normal conditions. Read More
Food SafetyProduce Safety Alliance Offers Course To Become A Certi…
May 20, 2015
The Produce Safety Alliance (PSA) has announced dates for their first two Train-the-Trainer courses this June. The first of the Read More
GrapesMatthew Fidelibus To Be Recognized For Extension Work
May 20, 2015
The American Society of Enology and Viticulture (ASEV) recently announced that Western Fruit Grower™ magazine contributor Matthew W. Fidelibus, of Read More
Apples & PearsGrants Available For Farmworker Education
May 19, 2015
Grants are available for farmworkers and their families interested in attending adult educational programs through the Washington Apple Educational Foundation Read More
Fruits$10 Million Available For California Water Conservation…
May 19, 2015
Applications for the California Department of Food and Agriculture’s (CDFA) California State Water Efficiency and Enhancement Program (SWEEP) are now Read More
CitrusBad Weather Or Not, Preparation Always On Radar For Flo…
May 19, 2015
You cannot prevent a natural disaster from taking everything you have, but you can lessen the blow if and when it happens. Read More
Sweet CornGrower, Marketer Team Up To Launch Line Of Single-Serve…
May 19, 2015
Next Level Fresh, LLC announced the introduction of Fresh Life Harvest Whole Ear Gourmet Sweet Corn. The concept was developed Read More
CitrusSave Your Greenhouse Structures From Storms
May 19, 2015
Make sure your protected agriculture components are prepared for whatever may blow this way. Read More
FruitsGreen Fruitworm Numbers High In Pennsylvania
May 19, 2015
In their latest insect report, David Biddinger and Grzegorz Krawczyk, tree fruit entomologists discuss the timing of pest control applications Read More
Apples & PearsApple Scab Alert
May 18, 2015
Kari Peter of Penn State University Extension warned growers of possible apple scab and fire blight infections following the rainy Read More
FruitsUSDA To Invest $21M To Help Growers Cope With Drought
May 18, 2015
USDA’s National Resources Conservation Service (NRCS) will allocate $21 million for growers and ranchers to apply conservation practices in the Read More
BB Hobbs Inc. warehouse in Plant City, FL
CitrusBB Hobbs Bolsters Business In Central Florida
May 18, 2015
Irrigation specialists celebrate opening of new branch warehouse in Plant City. Read More