A little about hydroponics 2

What does a plant need to grow

figure 1.2

How Do Plants Grow? Free Information on Plant Development!" Plant and Flower Guide, Discover Numerous Types of Flowers and. Web. 17 Nov. 2010. <http://www.plant-and-flower-guide.com/how-do-plants-grow.html>.

Plagues in the tomato plants

figure 1.3

figure 2.3

 This is a tomato affected by a plague called late blight caused by the fungus Phytophthora infestans.

figure 3.3

Top of plant infected with pseudo curly top virus.

Harrington,, By Jenny. "How to Prevent Blight on Tomato Plants | EHow.com." EHow | How To Do Just About Everything! | How To Videos & Articles. Web. 17 Nov. 2010. <http://www.ehow.com/how_7405998_prevent-blight-tomato-plants.html>.

"Symptoms of Pseudo Curly Top on Tomato Plant." Vegetable Diseases Cornell Home Page. Web. 17 Nov. 2010. <http://vegetablemdonline.ppath.cornell.edu/diagnostickeys/TomWlt/PseudoCurly_Tom.htm>.