The document discusses plant diseases and methods for controlling them. It identifies four characteristics of bacterial disease: vascular wilt, necrosis, soft rot, and tumors. Infection can occur through wounds, weather, nectar glands, humans, machinery, insects, or leaf scars. Control methods include seed treatment, crop rotation, using resistant varieties, protective sprays, biofungicides, removing weeds and tools, and avoiding overcrowding, damage, foreign soil, and working in moist soil. Controlling diseases can be difficult.

1. Control of Disease b.stev

2. MOSTLY to small to be visible with the EYE : it is MICROBES that damage plants

3. 4.Tumors- infection overstimulates growth & the multiplication of cells form an abnormally structured growth BACTERIA disease has 4 characteristic identities : 1.Vascular WILT- infection causes blockage to the plants H 2 O & nutrient/s 2.N ECROSIS – toxin is secreted - growth canker - leaf spots - stem blight 3.Soft ROT – enzyme/s degrade cell wall, common in fleshy vegetables: soft & watery

5. the SPREAD of disease : ALSO – grafting pruning cultivation transportation wind / rain / dust / insects/ mites (Encyclopedia Britannica, 2008)

8. SOME common diseases of plants

9. (Encyclopedia Britannica, 2008)

10. Bibliography Wikipedia. (2008). Plant pathology – wikipedia, the free encylopedia . Retrieved September 4, 2008, from http//:www. en.wikipedia.org/wiki/Phytopath ology - 58k Growing Edge Magazine. (2006). Growing Edge Magazine - 8 steps to control diseases of . Retrieved September 4, 2008, from www.growingedge.com/ magazine/back_issues/view_article.php3?AID=180244 - 25k - Encyclopedia Britannica. (2008). Plant disease, infectious disease - causing agents – britannica . Retrieved October 4, 2008, from www.britannica. com/EBchecked/topic/463327/ plant - disease /63336/ Infectious - disease - causing-agents -