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
ProductionUSDA Forecast Predicts Normal Water Supply For Parts Of The West
January 27, 2015
The Southwest, Sierra Nevada region, and Pacific Northwest are starting the year drier than normal. Read More
Apples & PearsThe Story Of Honeycrisp Is One Of Challenges And Success
January 27, 2015
‘Everything’s different’ in this world of 150 million 40-pound box world of apple growing. Read More
BerriesWhy You Should Be Growing Black Raspberries
January 27, 2015
Amazing health benefits for consumers and production and marketing benefits for the grower make this berry a must-consider option for your operation. Read More
Apples & PearsExpanded Market Access For U.S. Grown Apples To China
January 26, 2015
Agreement expected to boost apple exports by $100 million per year. Read More
CitrusNominees Sought For Florida Agricultural Environmental Leadership Award
January 26, 2015
Honor recognizes those developing and adopting environmentally innovative farming practices. Read More
CitrusIncreased Global Trade Opportunity Equals New Threats For Crops [Opinion]
January 26, 2015
Despite expanding business abroad, Florida Agriculture Commissioner Adam Putnam says he's confident in the protocols in place to prevent entry of invasive pests and disease. Read More
GrapesEstimates Vs. Actual: The Cost Of Installing A Vineyard
January 26, 2015
The true costs of developing a vineyard depend on variables such as vine selection, trellising, and labor. Read More
CitrusShopping For UAVs? Here Are 2 To Consider
January 25, 2015
Check out a couple of high-flying options from Altavian. Read More
OrangesScientists Center On Sweet Spot For Processed Oranges
January 24, 2015
Unique approaches and techniques being employed to sustain and squeeze more out of critical research. Read More
The Latest
ProductionUSDA Forecast Predicts Normal Water Supply For Parts Of…
January 27, 2015
The Southwest, Sierra Nevada region, and Pacific Northwest are starting the year drier than normal. Read More
Apples & PearsThe Story Of Honeycrisp Is One Of Challenges And Succes…
January 27, 2015
‘Everything’s different’ in this world of 150 million 40-pound box world of apple growing. Read More
BerriesWhy You Should Be Growing Black Raspberries
January 27, 2015
Amazing health benefits for consumers and production and marketing benefits for the grower make this berry a must-consider option for your operation. Read More
Apples & PearsThe Dark side Of Honeycrisp
January 27, 2015
Growers say there’s a love-hate relationship with America’s darling apple. Read More
Apples & PearsExpanded Market Access For U.S. Grown Apples To China
January 26, 2015
Agreement expected to boost apple exports by $100 million per year. Read More
CitrusNominees Sought For Florida Agricultural Environmental …
January 26, 2015
Honor recognizes those developing and adopting environmentally innovative farming practices. Read More
CitrusIncreased Global Trade Opportunity Equals New Threats F…
January 26, 2015
Despite expanding business abroad, Florida Agriculture Commissioner Adam Putnam says he's confident in the protocols in place to prevent entry of invasive pests and disease. Read More
GrapesEstimates Vs. Actual: The Cost Of Installing A Vineyard
January 26, 2015
The true costs of developing a vineyard depend on variables such as vine selection, trellising, and labor. Read More
CitrusShopping For UAVs? Here Are 2 To Consider
January 25, 2015
Check out a couple of high-flying options from Altavian. Read More
OrangesScientists Center On Sweet Spot For Processed Oranges
January 24, 2015
Unique approaches and techniques being employed to sustain and squeeze more out of critical research. Read More
BerriesIf You Could Plant Any Type Of Fruit, Consider A Canebe…
January 23, 2015
Raspberries or a blackberries present some berry good options. Read More
NutsNew Nut Industry Equipment
January 23, 2015
These new products are designed to make a nut grower's life easier. Read More
FruitsJiffy Pumped To Introduce New Produce Propagation Syste…
January 23, 2015
PreGro concept to make its debut at Fruit Logistica. Read More
Apples & PearsSurvey: Positive Indicators For Biocontrols In U.S. Hor…
January 22, 2015
Preliminary results of a survey conducted in December 2014 of more than 850 readers across six Meister Media Worldwide titles Read More
CitrusAsian Citrus Psyllid Marches North In California Citrus…
January 22, 2015
Part of one of the richest agricultural areas in the U.S., Fresno County, has been quarantined. Read More
Apples & PearsReal-World Solutions Highlight First Biocontrols 2015 C…
January 22, 2015
Topping the inaugural event's marquee are presentations on “Driving Crop Quality and Productivity Using Biocontrols” by representatives from two of the largest produce growing organizations in the country. Read More
Food SafetyStill Plenty On The Plate Regarding Food Safety Moderni…
January 22, 2015
Almost two years after originally being proposed, four revised rules are still being picked over. Read More
MarketingFlorida Citrus Commission Probes Federal Marketing Orde…
January 21, 2015
Meeting to be scheduled for March to vet possibilities. Read More