IDENTIFICATION OF NUTRIENT DEFICIENCIES FROM LEAF SYMPTOMS

July 10th, 2017
IDENTIFICATION OF NUTRIENT DEFICIENCIES FROM LEAF SYMPTOMS

At the end of the growing season, grape leaves are changing color. They turn from green to shades of yellow (white varietals) or red (red varietals) – see the Magnesium deficiency symptoms below (Figures 1 & 2). This is the result of the leaf senescence process: Chlorophyll is broken down, and nitrogen and other mobile nutrients are being removed from the leaf to storage tissues in the woody part of…

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SOME COMMON VITICULTURAL BAND-AIDS

July 3rd, 2017
SOME COMMON VITICULTURAL BAND-AIDS

Solving vineyard problems can be a complex and time consuming task, as is deciding how to correct them.  The most obvious remedy is sometimes taken to be the most practical while, in reality, it treats the symptoms rather than the cause of the problem.  In this article, we will consider some of these instances. Multiple Hedging Passes Hedging, which is also sometimes called topping or tipping, increases the uniformity of…

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IRRIGATION PUMP EFFICIENCY & more

June 26th, 2017
IRRIGATION PUMP EFFICIENCY & more

Not only are irrigation pump inefficiencies just plain bad for the environment, they cost the grower money!  No bueno!  Each percent of pressure wasted is equal to the additional costs paid in energy. If you waste 30%, you pay an extra 30%. Irrigation Efficiency evaluations can locate problems with your system well before you would find them out the hard way. These evaluations may also reveal some practices that could…

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IRRIGATION DISTRIBUTION UNIFORMITY

June 21st, 2017
IRRIGATION DISTRIBUTION UNIFORMITY

Did you know that yields within a single grapevine row can vary up to 5x? One factor in this yield variation is irrigation. Poor Irrigation System Distribution Uniformity (DU) has been shown to negatively impact crop yields in numerous studies conducted over the past several decades.  By managing DU and utilizing other tools for identifying uneven application of water across a field, these yield losses can be reversed.  Performing DU…

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USDA NRCS EQIP Funding

June 12th, 2017
USDA NRCS EQIP Funding

The USDA‘s NRCS  Environmental Quality Incentives Program (EQIP) is a voluntary program that provides financial and technical assistance to agricultural producers to plan and implement conservation practices that improve soil, water, plant, animal, air and related natural resources on agricultural land and non-industrial private forestland. EQIP may also help producers meet Federal, State, Tribal, and local environmental regulations. Since 2009, USDA NRCS (Natural Resources Conservation Service) has helped California’s farmers…

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TO HEDGE OR NOT TO HEDGE?

June 6th, 2017
TO HEDGE OR NOT TO HEDGE?

Hedging is a summer pruning method involving the removal the distal or apical ends of shoots.  In some parts of the world hedging is called topping or tipping.  Like all pruning methods, hedging depresses vine growth vigor and capacity.   It does so by reducing the number of leaves and buds, which contain potential leaves.  Leaves, of course, function similar solar panels, converting solar energy into the chemical energy that drives…

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WHEN NEGOTIATION DOESN’T WORK

May 10th, 2017
WHEN NEGOTIATION DOESN’T WORK

In January the Lodi Winegrape Commission hosted a very informative and well-attended workshop on negotiation presented by Jim Olson from the Graduate School of Management at U.C. Davis.  Jim is extremely knowledgeable and his presentation was universally well received. Jim defined negotiation as “a form of decision making in which two or more parties talk with one another in an effort to resolve their opposing interests.”  He then gave us…

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SHOOT THINNING

May 2nd, 2017
SHOOT THINNING

If shoot thinning were a book or movie it might be entitled Pruning: The Final Chapter.  Quite simply, shoot thinning, which is the selective removal of shoots, enhances the viticultural effects of pruning and in some ways, finishes the pruning job.  Here we will explore the benefits of careful shoot thinning and how to achieve them. Shoot thinning conserves and often, improves the shoot spacing established while spur pruning cordons…

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PH AND WATER QUALITY EFFECT ON PESTICIDE SPRAY SOLUTION

April 23rd, 2017
PH AND WATER QUALITY EFFECT ON PESTICIDE SPRAY SOLUTION

Water is going to be the primary carrier of your agricultural chemicals. It will have the job of delivering pesticides to the plant, fungal spores or insect to achieve the goal of protecting your vines. Water quality is determined by chemical properties such as pH (measure of acidity and alkalinity) and the level of inorganic minerals present (water hardness as determined by level of minerals such as calcium, magnesium, potassium,…

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ANOTHER PERSPECTIVE ON REGULATIONS

April 11th, 2017
ANOTHER PERSPECTIVE ON REGULATIONS

Every Winter grape growers in San Joaquin and other counties in California attend update meetings sponsored by their local agricultural commissioner’s office.  At those meetings they learn about the latest in state and federal pesticide regulations, worker safety requirements, nitrogen fertilizer reporting requirements and the like.  Inevitably there is grumbling as the growers chafe under the every-increasing burden of regulations. On top of that, many growers voluntarily choose to submit…

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Event Calendar
  1. Lodi Winegrape Commission Board Meeting

    October 17 @ 2:00 pm - 5:00 pm
  2. Executive & Finance Committee Meeting

    October 19 @ 9:00 am - 10:00 am