Difference between revisions of "Team:Bordeaux/Problem"
Line 53: | Line 53: | ||
<p align= "justify" style="text-indent: 3vw;"> In particular, the Aquitaine region is menaced due to it's favorable (?) climate and the economic importance of the wine industry. Thus, Downy mildew has been considered the most <b> devastating disease </b> caused by a <b> filamentous pathogen </b> to affect European vineyards and this has lead vineyards to search for effective measures to protect their vines. Unfortunately, most of these mesures have a bad environmental impact and pollute the surrounding soils. </p> | <p align= "justify" style="text-indent: 3vw;"> In particular, the Aquitaine region is menaced due to it's favorable (?) climate and the economic importance of the wine industry. Thus, Downy mildew has been considered the most <b> devastating disease </b> caused by a <b> filamentous pathogen </b> to affect European vineyards and this has lead vineyards to search for effective measures to protect their vines. Unfortunately, most of these mesures have a bad environmental impact and pollute the surrounding soils. </p> | ||
− | |||
<p class="reference" align="left"> <b>Literature Cited: </b> </p> | <p class="reference" align="left"> <b>Literature Cited: </b> </p> | ||
Line 71: | Line 70: | ||
<br> <br> | <br> <br> | ||
<h6 align="justify"> Infection Mode of Downy Mildew</h6> | <h6 align="justify"> Infection Mode of Downy Mildew</h6> | ||
− | <p align="justify" style="text-indent: 3vw;"> Downy mildew requires a warm, moist, and humid environment to reproduce and infect the plant. </p> | + | <p align="justify" style="text-indent: 3vw;"> Downy mildew requires a warm, moist, and humid environment to reproduce and infect the plant. Common symptoms include necrosis of the stem or shoot, discoloration, brown spotting and yellowish-green tips of the leaves and mycelium invasion of the grapes. </p> |
<p align="justify"> In winter, <i> Plasmopara viticola </i> is present on dead leaves on the ground as oospores. They are inactive and do not produce any symptoms. When rain falls during spring, these eggs grow and release zoospores when the temperature exceeds 11 degrees. The zoospores will be able to spread and infect the plant's upper tissues through rainwater's splashes. </p> | <p align="justify"> In winter, <i> Plasmopara viticola </i> is present on dead leaves on the ground as oospores. They are inactive and do not produce any symptoms. When rain falls during spring, these eggs grow and release zoospores when the temperature exceeds 11 degrees. The zoospores will be able to spread and infect the plant's upper tissues through rainwater's splashes. </p> | ||
<p align="justify">The primary contamination begins by the emission of a filament through the stomatal area where the parasite begins to develop sinkers from which is formed the mycelial network. These sinkers help to feed <i>Plasmopara viticola </i> by stealing the plant's nutrients, which creates discolored and yellowish areas on the it's leaves called “oil stains”. After, on leaves bottom, conidiophores and conidia are formed. These symptoms cause damages to the leaves’ tissues and affect the plant’s photosynthetic ability, which slows down the maturity of the plant.</p> | <p align="justify">The primary contamination begins by the emission of a filament through the stomatal area where the parasite begins to develop sinkers from which is formed the mycelial network. These sinkers help to feed <i>Plasmopara viticola </i> by stealing the plant's nutrients, which creates discolored and yellowish areas on the it's leaves called “oil stains”. After, on leaves bottom, conidiophores and conidia are formed. These symptoms cause damages to the leaves’ tissues and affect the plant’s photosynthetic ability, which slows down the maturity of the plant.</p> |
Revision as of 00:43, 1 August 2015