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<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Trunk disease management options decision tool</title>
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<h1 class="title"><a href="index.html">Trunk disease management options decision tool</a></h1>
<h1 class="images">
<img src="img/header-photo-center.jpg" alt="Photo: Esca" />
<img src="img/header-photo-right.jpg" alt="Photo: Eutypa dieback" />
<img src="img/header-photo-extended01.jpg" alt="Photo: Phomopsis dieback" />
<img src="img/header-photo-extended02.jpg" alt="Photo: Eutypa dieback" />
<img src="img/header-photo-extended03.jpg" alt="Photo: Bot dieback" />
</h1>
</div>
</header>
<section class="content-wrap">
<fieldset class="instructions">
<h2 id="introduction">Introduction</h2>
<p>The grapevine trunk diseases (aka wood-canker diseases) are widespread throughout all of California’s grape-growing regions.
This disease complex includes: Botryosphaeria dieback (aka Bot canker), Eutypa dieback, Phomopsis dieback, and Esca (aka Measles, Young vine decline, Petri disease).<p/>
<p>Every California vineyard is eventually infected by one predominant trunk disease or a combination. These diseases significantly reduce yields in mature vineyards by either killing fruiting positions (main impact of the dieback-type diseases) or decreasing vine vigor (main impact of Esca). These impacts accumulate each year, as there are no effective methods to eradicate the wood infections. Diseased vineyards must be replanted prematurely, and the high start-up costs are not repaid. If adopted in young vineyards, preventative practices can reduce the negative effects of trunk diseases.</p>
<p>On this site you will find the results from an economic analysis of early adoption of three field-tested, preventative practices (delayed pruning, double pruning, and application of pruning wound protectant). This research is part of a <a href="http://treeandvinetrunkdiseases.org"> trunk disease project</a> funded by a Specialty Crop Research Initiative (SCRI) USDA, National Institute of Food & Agriculture grant. This site also provides growers an opportunity to enter economic and yield data for their operation to see how trunk diseases and these preventative practices might affect production in their winegrape vineyard. </p>
<h3 id="instructions">Instructions</h3>
<p>In the following section of this site, you are prompted to select a winegrape growing region, figures of annual yields and cumulative net returns, and tables containing annual and cumulative indicators taken from our economic analysis. You will also be asked to select the preventative practices and vineyard age when a preventative practice is first adopted. The results are determined in part by the disease control efficacy, which are difficult to anticipate. As such, the results are presented across three disease control efficacy rates for these practices based on evidence found in the scientific literature. Links on the page provide descriptions of the preventative practices and disease control efficacy rates as well as definitions of the variables displayed in the figures and tables. All figure and table results list the underlying region-specific parameter values used in the economic analysis.</p>
<p>You will also find <a href="custom-parameters.html">the link to an input form</a> where you will be prompted to enter yield, price, cultural cost, and preventative practice cost information, and then select figures and tables similar to the regional figures and tables generated on this page to display the results.</p>
<p>For inquiries about the page and economic analysis of trunk diseases in California winegrape vineyards, please contact <a href="mailto:kaplanj@csus.edu">kaplanj@csus.edu</a>. </p>
<p><em>Partial support for this site is provided through grants from the California Department of Agriculture’s Specialty Crop Block Grant program in partnership with <a href="http://sustainablewinegrowing.org">the California Sustainable Winegrowing Alliance</a> and the Specialty Crop Research Initiative (SCRI) USDA, National Institute of Food & Agriculture. <a href="http://treeandvinetrunkdiseases.org">For more information on trunk disease research, please visit the SCRI Trunk Disease Project Page</a>.</em></p>
</fieldset>
</fieldset>
<form id="theform">
<label><strong>Vineyard region: </strong><select name="region">
<option value="nsj">Northern San Joaquin</option>
<option value="napa">Napa</option>
<option value="lake">Lake</option>
<option value="sonoma">Sonoma</option>
<option value="cc">Central Coast</option>
</select></label>
<h3 id="figureparameters">Figure parameters</h3>
<label><input type="checkbox" name="figuregen" id="figuregen" checked="checked" />Generate figure</label>
<fieldset class="figure">
<!--<h4>Specify figure options</h4>-->
<h4>Display output as:</h4>
<ul>
<li>
<label><input type="radio" name="figuredisplay" value="netreturns" checked />Cumulative discounted net returns <span class="show-for-medium-up">(thousands of $ per acre)</span></label>
<label><input type="radio" name="figuredisplay" value="yield" />Annual yield <span class="show-for-medium-up">(tons per acre)</span></label>
</li>
<li class="glossary-link"><a href="variable-definitions.html">Variable definitions</a></li>
</ul>
<!--<h4>Aggregate output:</h4>
<label><input type="radio" name="aggregatefig" value="cumulatively" checked="checked" />Cumulatively</label>
<label><input type="radio" name="aggregatefig" value="annually" />Annually</label>-->
<!--<h4>Specify management scenario</h4>-->
<h4>Select the management practices to consider:</h4>
<ul>
<li>
<label><input type="checkbox" name="practicefig" value="dp" />Delayed pruning</label>
<label><input type="checkbox" name="practicefig" value="hp" />Hand-painted TopsinM</label>
<label><input type="checkbox" name="practicefig" value="dbp" />Double pruning</label>
</li>
<li class="glossary-link"><a href="practice-definitions.html">Practice definitions</a></li>
</ul>
<h4>Select (a) or (b).</h4>
<section class="efficacyfig-wrap">
<h4><label for="efficacyOrYearfig"><input type="radio" name="efficacyOrYearfig" value="efficacy" /> (a) Indicate anticipated disease control efficacy:</label></h4>
<ul>
<li>
<label><input type="checkbox" name="efficacyfig" value="25" />25%</label>
<label><input type="checkbox" name="efficacyfig" value="50" />50%</label>
<label><input type="checkbox" name="efficacyfig" value="75" />75%</label>
</li>
<li class="glossary-link"><a href="efficacy-information.html">Disease control efficacy rate information</a></li>
</ul>
</section>
<section class="yearfig-wrap">
<h4><label for="efficacyOrYearfig"><input type="radio" name="efficacyOrYearfig" value="year" /> (b) Indicate year of practice adoption:</label></h4>
<ul>
<li>
<label><input type="checkbox" name="yearfig" value="Year3" />Year 3</label>
<label><input type="checkbox" name="yearfig" value="Year5" />Year 5</label>
<label><input type="checkbox" name="yearfig" value="Year10" />Year 10</label>
</li>
<li class="glossary-link"><a href="#" class="glossary-inline-link">Age of adoption information</a><br /><span class="glossary-inline">We derive results when preventative practices are adopted in years 3, 5, or 10 to evaluate conditions when vines are fully trained onto the trellis system and winter pruning begins (3 years old), when vines reach maturity (5 years old), and when trunk disease symptoms typically appear in vineyards (10 years old). These years were selected following grower interviews and discussions with viticulture farm advisors to reflect key stages in a vineyard’s lifespan.</span></li>
</ul>
</section>
</fieldset>
<h3 id="tableparameters">Table parameters</h3>
<label><input type="checkbox" name="tablegen" id="tablegen" checked="checked" />Generate table</label>
<fieldset class="table management">
<p><a href="custom-parameters.html">Customize parameters</a></p>
<h4>Select the management practices to consider:</h4>
<ul>
<li>
<label><input type="checkbox" name="practicetable" value="dp" checked="checked" />Delayed pruning</label>
<label><input type="checkbox" name="practicetable" value="hp" />Hand-painted TopsinM</label>
<label><input type="checkbox" name="practicetable" value="dbp" />Double pruning</label>
</li>
<li class="glossary-link"><a href="practice-definitions.html">Practice definitions</a></li>
</ul>
<h4>Select anticipated disease control efficacy:</h4>
<ul>
<li>
<label><input type="checkbox" name="efficacytable" value="25" checked="checked" />25%</label>
<label><input type="checkbox" name="efficacytable" value="50" />50%</label>
<label><input type="checkbox" name="efficacytable" value="75" />75%</label>
<li class="glossary-link"><a href="efficacy-information.html">Disease control efficacy rate information</a></li>
</ul>
<h4>Select year of practice adoption:</h4>
<ul>
<li>
<label><input type="checkbox" name="adoptiontable" value="3" />Year 3</label>
<label><input type="checkbox" name="adoptiontable" value="5" />Year 5</label>
<label><input type="checkbox" name="adoptiontable" value="10" />Year 10</label>
</li>
<li class="glossary-link"><a href="#" class="glossary-inline-link">Age of adoption information</a><br /><span class="glossary-inline">We derive results when preventative practices are adopted in years 3, 5, or 10 to evaluate conditions when vines are fully trained onto the trellis system and winter pruning begins (3 years old), when vines reach maturity (5 years old), and when trunk disease symptoms typically appear in vineyards (10 years old). These years were selected following grower interviews and discussions with viticulture farm advisors to reflect key stages in a vineyard’s lifespan.</span></li>
</ul>
<h4>Select output parameters:</h4>
<ul>
<li>
<label><input type="checkbox" id="acdnb" name="outputtable" value="acdnb" />Additional cumulative discounted net benefits (ACDNB)</label>
<label><input type="checkbox" name="outputtable" value="aapo" />Age adoption pays off</label>
<label><input type="checkbox" name="outputtable" value="lpy" />Last profitable year</label>
<label><input type="checkbox" name="outputtable" value="ipt" />Infection probability threshold</label>
</li>
<li class="glossary-link"><a href="variable-definitions.html#tablevars">Variable definitions</a></li>
</ul>
</fieldset>
<input type="submit" value="Display returns to this practice" />
</form>
<section id="results" class="results"></section>
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