Those interested in organic farming were dealt a good dose of tips in Tulare on topics ranging from use of cover crops, the future of bees, organic production of alfalfa and other subjects.

They also heard from a grower panel about the good and bad of growing organic, including the challenges of paperwork, finding labor and the scramble to meet market demand.

The program on Sustainable/Organic Production in the Southern San Joaquin Valley was presented by the Organic Fertilizer Association of California and the California Association of Pest Control Advisors for Tulare and Kings County.

Eric Mussen, an entomologist with the University of California at Davis, made it clear that “organic pesticides are not benign to honeybees” and that honey bees remain at peril of being compromised by even small doses of pesticides. “No pesticide is benign to bees or other living organisms,” he said.

At the same time, he said there are steps that can be taken to protect bees, including better communication with bee keepers so they can take steps to protect them.

“For example, hives can be covered temporarily to avoid pesticide exposure for a half or even a whole day” during pesticide applications, Mussen said.

The bees are vital for the pollination of many crops, most notably almonds, but their numbers have been diminishing over time – he said as many as 30 percent of colonies are lost each year.

“Sub-lethal effects can be subtle,” he said, leading to malformation of bees, shortening of the adult life span, interference with larval development and other hormonal effects on the brood.

Bee toxic pollens can be collected from flowers sprayed with pesticides or from systemic pesticides provided to the plant on the seeds, through the soil or in irrigation water. Leaky chemigation systems give bees the highest doses, Mussen said.

Diminished availability of some flowering plants is another problem, Mussen said. That can be countered in a measure with use of cover crops.

Tom Johnson, with Kamprath Seed, talked of the value and challenges of growing cover crops and how they can be used to attract beneficial insects, cut down on dust and mites and otherwise benefit crops.

Johnson defines cover crops as generally “non-economic” but having value, when planted within a permanent crop or in rotation with field crops. They can control erosion, add organic matter to the soil, add or conserve nitrogen and improve soil structure or water infiltration.

Challenges of cover cropping in Central California include determining whether that is the best use for the land, water availability, availability of equipment to manage the cover crop and the time spent doing so.

Cover crops can be plowed down, they may reseed themselves and they may be perennial, Johnson said. An advantage of a plow-down cover is that it is the easiest to plant, establish and manage and it offers flexibility for rotation and “fine tuning,” he said.

Cover crops can also provide something to drive on during the wet season, Johnson said, along with reducing dust in the summer, and they can be managed for frost protection.

One slide he showed depicted a cover crop growing on a road through an orchard. Johnson pointed out some irrigation may be needed to keep the cover alive during the searing Valley heat.

Covers can also be used to reduce water runoff and to act as buffers. And alfalfa can be used as a trap crop for lygus in cotton and strawberries.

Weed, pest pressures

Carol Frate, University of California farm adviser in Tulare County, talked of the best approached to growing sustainable or organic alfalfa. She acknowledged it can be particularly challenging because of weed and pest pressures.

In choosing a field for organic hay production, Frate said it is important to find one that is well drained and free of weeds and rodents and to not follow alfalfa with alfalfa.

For established alfalfa, she said, it is best to fertilize after the first or second cutting, not during the winter or it will encourage weed growth. Best would be August or September when alfalfa is growing vigorously.

Two recommended planting times for the Valley are September and October or late January and early February. Frate favors fall planting because of better root development and weeds that will go away after the first cutting.

Organically grown seeds must be used if available. Frate recommends using the most pest and disease resistant varieties and she favors non-dormant varieties with faster re-growth to inhibit weeds. She also favors seeding at higher rates to inhibit weeds.

Over-seeding with oats and other materials may cut down on weeds but will likely diminish economic value, she said.

Leaving uncut strips of alfalfa in the field helps maintain beneficial predators and parasites, Frate said.

As for gophers, she recommends keeping vegetation low, putting up owl or raptor boxes, shooting and trapping.

Frate cited a number of online sources that could be helpful to those interested in growing alfalfa. They include coststudies.ucdavis.edu for a link to a 2013 publication on the costs of establishing and producing organic alfalfa hay; ipm.ucdavis.edu for links to pests in alfalfa; and alfalfa.ucdavis.edu and alfalfa.org/varietyLeaflet.html for additional information.

A panel of organic growers was quizzed on what they see as the challenges and rewards of growing organically. All three agreed that sales of organics are rising year to year.

“The market is growing at double digits every year,” said Gerald Davis with Crystal Organic Farms, a division of Grimmway Farms in Kern County. “We’re huffing and puffing to keep up. The demand is there.”

Kyle Reynolds with KMK Farms in Kingsburg said, “My challenge is to figure out what people want; demand is growing.”

Mike Naylor with Naylor Organics in Dinuba said paperwork associated with growing organically is a major challenge.

“You realize I went into organic to get away from paperwork,” he said.

“When I started, it was spit and a handshake and they trusted you,” he said, referring to certification. “Now they only trust you if you give them $6,000, and a lot of small farmers are saying, ‘You know what; I’m done.’”

They’re burned out, he said, by having to “spend time at the desk rather than out on the tractor.”

 

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