From Gary Pilarchik: Why & How to Manage Tomato Diseases Using Aspirin: Beef up Defenses - TRG 2014 - YouTube http://buff.ly/1tZ3PSh -- "I've done a couple videos on aspirin and how it can be used to manage tomato diseases. I answer more questions in this video. The salicylic acid in aspirin mimics a natural hormone that tricks the tomato into initiating the SAR response or the Systemic Acquired Resistance response... which means you are turning on all your tomatoes defenses without a true attack occurring. I believe this method of management makes it harder for disease to establish themselves on tomato leaves. I use it yearly."