Coffee Shop

In the Vineyard with Paul Verdegaal: A Dry Year and Pest Update

July 21st, 2014
In the Vineyard with Paul Verdegaal: A Dry Year and Pest Update

The official end of the rainfall year shows a total of 10.2 inches of rain for 2013-14 – the driest season in the last 12 years and only slightly ahead of the 1976-77 drought. Fortunately, the last significant rain occurred with perfect timing and in a heavy event that mitigated the very dry soil conditions for local vineyards. Enough rain fell just before budbreak to provide for good growth and…

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The Value of Powdery Mildew Resistance in Grapes: Evidence from California

July 15th, 2014
The Value of Powdery Mildew Resistance in Grapes: Evidence from California

Powdery mildew (PM) is a fungal disease that can damage many crops. On most plants, PM appears as white, powdery spots on leaves, shoots, flowers or fruit, which if untreated, can spread over large areas of the leaves and stems and cause reduced yields and lower fruit quality. Grape PM, Erisiphe necator, is the most prevalent leaf-infecting disease for California grapes. Across the state, it accounts for 74% of grape…

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Global Wine Market Update from the Ciatti Company

July 7th, 2014
Global Wine Market Update from the Ciatti Company

Updated reports are coming in on harvests around the world. The government projections in Argentina have changed dramatically over the past month. Earlier crop reports had projected a 30% decline in volume, but new reports now estimate only a 6% decline from the previous year. In Italy, an updated harvest report now shows that they had a much larger than previously reported crop in 2013, and now holds the title…

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Spider Mite Control in California Vineyards with Conventional and OMRI-approved Acaricides

June 30th, 2014
Spider Mite Control in California Vineyards with Conventional and OMRI-approved Acaricides

Spider mites are found in vineyards throughout most grape growing areas of the world. In California, the primary spider mite pests are the Pacific spider mite, Tetranychus pacificus, and the Willamette spider mite, Eoteranychus willamettei (Karban and Zalom, 1998). The Pacific mite can be a major problem in warmer grape-growing areas and in hot and dry years. Although it can cause damage early in the season, Pacific mites generally prefer…

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Lodi Acreage and Potential 2014 Crop Size

June 23rd, 2014
Lodi Acreage and Potential 2014 Crop Size

Here at Allied Grape Growers AGG, we recently combed through the 2013 Grape Acreage Report published by the California Ag Statistics Service.  As we have done over the years, we analyzed every corner of the report, identifying missing acres and creating a better understanding of the true winegrape acreage planted in the state, by district and variety.  Since the report is voluntary we know data will be missing, but fortunately…

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Remote Sensing for Vineyard Pest Management

June 16th, 2014
Remote Sensing for Vineyard Pest Management

Remote sensing is a valuable tool for vineyard managers to assess several aspects of their viticultural operations, including pest management programs. Remote sensing refers to the use of aircraft or satellites to provide pictures or digital images of vineyards. Synoptic images taken from above vineyards often provide insight into patterns in vine growth that are more difficult to discern from the ground. Subtle differences that may go unnoticed in the…

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Quick and Easy Pesticide Use Reporting

June 9th, 2014
Quick and Easy Pesticide Use Reporting

In 1990 California became the first state to require full reporting of agricultural pesticide use. Under the full use reporting regulations growers are required to report monthly the pesticides they use to the agricultural commissioner of the county in which the pest control work was done. Specifically, there are 17 pieces of information that the grower is required to report for each pesticide application: month and year of the application(s)…

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Practical Uses of Aerial Imagery in Lodi Vineyards

May 27th, 2014
Practical Uses of Aerial Imagery in Lodi Vineyards

Using Aerial Imagery to enhance farm productivity was once out of reach, but it is now much more accessible on a timely basis for an affordable price.   When you hear phrases like Color Infrared (CIR), Normalized Difference Vegetation Index (NDVI) and thermal imagery it may conjure up some forensic type of scientific data analysis that only a PhD could do, however, it is very much the opposite. In today’s world,…

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Important Structures & Features of Grapevines

May 14th, 2014
Important Structures & Features of Grapevines

The Lodi Winegrape Commission and the University of California Division of Agriculture and Natural Resources (UC ANR) are partnering to provide Lodi winegrowers with the latest information about grape pest management. This is the first of several excerpts from the third edition of the Grape Pest Management book to be published here in the Coffee Shop. In Grape Pest Management, more than 70 research scientists, cooperative extension advisors and specialists, growers, and pest…

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In the Vineyard with Paul Verdegaal

May 12th, 2014
In the Vineyard with Paul Verdegaal

The 2014 season started off with Chardonnay budbreak just slightly ahead of average about 6 days, on March 9th.  As in 2013 warm daily maximums, but below average nightly lows have allowed for a below average accumulation in Growing Degree Days (GDD).  Drought conditions have continued and intensified from last season. Fortunately significant rain events in February and early March were perfectly timed to alleviate a lot of stress on…

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