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Grapevines Articles & Analysis
17 articles found
In California’s sun-soaked vineyards, where the wine and table grape industries are cornerstones of the state’s agricultural economy, powdery mildew remains a relentless adversary. Caused by the fungal pathogen Erysiphe necator, powdery mildew is one of the most pervasive and damaging diseases in viticulture, affecting both the yield and the market quality of grapes. Once ...
An article reporting their methodology was featured in Plant Science in 2014, describing how the Researchers used temperature gradient greenhouses and growth chamber greenhouses to simulate climate change conditions and study plant responses.4Choosing the Right Growth ChamberCompared to traditional growth chambers, temperature gradient greenhouses and controlled growth chambers offer increased ...
High yield reduction will be expected due to these cold waves, occurring after weeks of heat and crop development. During dormancy, grapevines can support temperatures as low as -15°C. However, as soon as the vines bud, they become more vulnerable. ...
” The other major pest for grapevines in California is the vine mealybug, which transmits the leaf roll virus. ...
Winemakers rely on their instincts, palettes, and a thorough knowledge of the nuances involved in every stage of the winemaking process as they strive to achieve the flavors and qualities that they desire.Even a cursory overview of certain elements of the process underscores the critical role played by gases…from fermentation to first sip…in preserving the flavors created and nurtured by the ...
Leaf Area/Crop Weight Ratios of Grapevines: Influence on Fruit Composition and Wine Quality. Am J Enol Vitic. 56: 170-181. ...
Discussion of practical consequences related to irrigation volume and frequency, and the need to systematically relate irrigation strategies to the effects on plant water use and fruit ...
Discussion of practical consequences related to irrigation volume and frequency, and the need to systematically relate irrigation strategies to the effects on plant water use and fruit ...
PureVine can help quantify the prevalence and reveal the locations of specific grapevine diseases in vineyard blocks. Using PureVine with our water content data can enable more accurate usage of precision irrigation systems. ...
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In a previous post we discussed how Grapevine Leafroll disease affects grapevines but to quickly recap, Grapevine Leafroll Disease is one of the most common and persistent grapevine diseases; it can have devastating impacts on a vineyard, delaying fruit maturity and dramatically reducing fruit quality, pigmentation, vine vigor, ...
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An area of extremely high vigor might indicate a water leak that needs attention, whereas an area showing very low vigor might be the result of nutrient deficiency or grapevine disease. We also offer disease mapping and are able to scout for grapevine disease 200 times more efficiently than traditional scouting methods. Our technology was even proven to be more ...
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VineView also uses both multi and hyperspectral data which allows us to spectrally isolate the grapevine from the surrounding soil and cover crop, so you get just the vine canopy information, and none of the “noise”. ...
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For example, an area of extremely high vigor might indicate a water leak that needs attention, whereas an area showing very low vigor might be the result of nutrient deficiency or grapevine disease. Interestingly, however, there are several common vine diseases which can be associated with high vigor levels as well. ...
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Grapevine leafroll disease (GLD) is one of the most common and persistent grapevine diseases, present in all grape-growing regions of the world, and affecting up to 50 per cent of vineyards globally.1 It is a viral disease caused by a small insect called the grapevine mealybug, which are known to be carriers of Grapevine ...
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Researchers have used these greenhouses to investigate the potential effects of climate change on the growth of grapevine, alfalfa and lettuce. CO2 Sensors for Climate Change Research Researchers investigating the effects of climate change on plant growth using greenhouses or growth chambers will require highly accurate CO2 measurements. ...
Vine leaf area index has a great impact on berry quality. This study was conducted to determine whether vine leaf area index could be estimated, and mapped through normalized difference vegetation index (NDVI) ground-based measurements. The NDVI measurements were performed using a Greenseeker (N-Tech Industires, Ukiah, CA and Oklahoma State Univ., Stillwater), pointed sideways at the vertical ...
The mulches applied released considerable quantities of nutrients, which were available for use by the grapevines. Generally, the type of mulch used had little impact on the parameters that were measured and the greatest differences occurred between non-mulched and mulch treatments. ...