vertical resistance are temporary in that they stop functioning on the appearance of a matching vertical pathotype. They are within the capacity for micro-evolutionary change of the parasite. However, this is not an exclusive trait, and other kinds of resistance, such as the single-gene resistances of genetic engineering, are also expected to be within the capacity for micro-evolutionary change of the parasite. Tendril
A thread-like appendage used by vines as an aid to climbing. Tendrils usually twist around suitably sized objects. Terminal
This word means 'at the end of as in terminal bud, etc. Terracing
Converting hillsides into terraces that follow the contour is a method of soil conservation. It is an expensive process but, once completed, it is both effective and easily maintained.
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