On Fri, 12 Sep 2003 17:16:37 GMT, "Cereoid-UR12-"
wrote:

It is best not to grow a particular crop in the same plant family in the
same spot the next year so that insect pests and diseases don't get
established.

Better, yes. But many people don't have the space to change planting
patterns each season, or perhaps they only grow tomatoes in their back
yard garden. Of course if there *is* a disease problem, identifying
exactly what it is, getting rid of the diseased plants, and doing
whatever's required to prevent the same thing from happening again,
including rotation and resistant-type plants, is important. As for
insect pests, I doubt a tomato (tobacco) hornworm is going to be
fooled if the tomato plants move 20' away. :-) The situation may be
quite different for industrial/commercial production, or even a small
farm, but for back yard gardens, choices are fewer.