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Grubbing is performed following clearance of trees to their stumps, preceding construction. [1] In animal behaviour grubbing is a feeding technique, referring to digging and uprooting of roots and rhizomes of plants. It is employed by geese, especially greater and lesser snow geese and Canada geese, [2] as well as swine. [3]
Roads, sidewalks and foundations can all suffer structural issues from tree roots. [7] Several methods of control have been attempted, from barriers to encouraging growth in desirable directs. Selection of plants with root systems that will not conflict with nearby structures is the most effective method of damage control.
Root barriers are also used to separate plant roots from each other. In particular, walnut trees secrete the chemical juglone which is toxic to other plants but the use of root barriers can prevent the yield reduction that would normally occur when walnut trees are alley cropped with maize as often occurs in the American Midwest .
Slime flux, also known as bacterial slime or bacterial wetwood, is a bacterial disease of certain trees, primarily elm, cottonwood, poplar, boxelder, ash, aspen, fruitless mulberry and oak. A wound to the bark , caused by pruning, insects, poor branch angles or natural cracks and splits, causes sap to ooze from the wound.
The rhizosphere is the thin area of soil immediately surrounding the root system. It is a densely populated area in which the roots compete with invading root systems of neighboring plant species for space, water, and mineral nutrients as well as form positive and negative relationships with soil-borne microorganisms such as bacteria, fungi and insects.
The roots of privet can reproduce asexually through root suckers. [5] This vegetative reproduction makes privet difficult and costly to control because root fragments left in the soil can sprout and grow new plants. [5] One reason why privet is so invasive in the United States is because it has few native shrub competitors. [11]