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Chapter 9-12 Test
Introductory Horticulture - 7th Edition, Reiley and Shry
58
Agriculture
Undergraduate 1
10/29/2011

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Term
The main difference between separation and division is:
Definition
separation is natural, division they must be cut apart
Term
The specialized plant parts used in division and separation have two function. One is for propagation, the other is:
Definition
Food Storage
Term
A corm is a specialized:
Definition
Stem
Term
Daffodil bulbs are stored at:
Definition
55-60°
Term
The tops of bulb-producing plants should be allowed to continue growing until they die naturally because:
Definition
they continue to manufacture food for storage in the bulbs
Term
Potted plants such as a potted amaryllis can be forced into dormancy by withholding:
Definition
Water
Term
Lily bulbs are loosely sealed bulbs and must be stored in moist sand, peat, or sawdust to prevent:
Definition
drying out
Term
The Easter lily is propagated commercially with underground
Definition
stem bublets
Term
The gladiolus is propagated through formation of small:
Definition
cormels
Term
In propagation by division, the section of dahlia root that is cut from the mother clump must have a:
Definition
bud
Term
A rhizome is an underground
Definition
Stem
Term
an example of a plant propagated with rhizomes is
Definition
Iris
Term
Tuberous roots are thickened
Definition
roots
Term
Bulbs and corms reproduce by a process known as
Definition
separation
Term
Tulip
Definition
Bulb
Term
Corm
Definition
Gladiolus
Term
Tuber
Definition
Irish Potato
Term
Tuberous Root
Definition
Dahlia
Term
Rhizome
Definition
Iris
Term
Define grafting
Definition
Two different plants being united so they grow as one
Term
List five reasons for grafting
Definition
1. rapidly increase number of plants
2. gives plants a stronger, more disease resistant roots
3. To topwork large trees
4. To insert different variety on part of the limbs on trees for cross pollination purposes
5. To propagate plants that are difficult to bud
Term
Whip or tongue grafting are the best method to use when the rootstock and scion are:
Definition
About the same size in diameter
Term
The goal in grafting is to unite two plants...
Definition
in a physical union so that they grow together
Term
In grafting, great care must be used to march which layer of the scion and rootstock?
Definition
cambium
Term
The ideal time of the year to cleft graft is
Definition
early spring, just before the buds start to swell
Term
The side veneer graft is the most effective way to propagate the
Definition
blue Colorado spruce
Term
The best time of year to whip or tongue graft is
Definition
winter when plants are dormant
Term
The top part of a grafteed Colorado blue Spruce shoudl be protected very carefully from drying because
Definition
none of the above
Term
In cleft grafting one side of the scion is cut thicker than the other
Definition
1. so that there is more pressure on that side, resulting in close contact with the cambium
2. so that the scion is handled more easily
3. so that the scion makes more rapid growth
Term
All cut areas that are left exposed in the grafting process should be covered with waterproof material to...
Definition
prevent drying
Term
A new technique modifying the usual whip or cleft graft method used to root roses more quickly
Definition
stenting
Term
When budding...
Definition
1. The bud stick must have mature buds
2. a single bud is used instead of a scion
3. only vegetative buds are used
Term
T-budding is done when the rootstock is
Definition
in active growth and about the size of a pencil
Term
vegetative or leaf buds may be differentiated from flower buds because...
Definition
they are more slender or pointed
Term
bud sticks are cut from
Definition
1. actively growing wood
2. healthy wood
3. the current season's growth
Term
rootstock for budding is
Definition
1. grown from seeds planted in previous years
2. generally about the size of a pencil
3. of a closely related plant species
Term
The bud is inserted into the rootstock
Definition
on the north side 2 inches above the ground
Term
From which portion of the bud stick are the best quality buds obtained
Definition
Middle
Term
Three plants commercially propagated by budding are the
Definition
apple, peach, and rose
Term
The bud is cut with a small shield of
Definition
bark and wood
Term
The seedling is the proper state of growth for budding if upon opening the T-shaped cut in the seedling, the bark separates from the wood
Definition
easily enough so the bud can be inserted
Term
The leaf stem or petiole is left on the bud because
Definition
it acts as a handle for holding the bud
Term
The bud is tied tightly in place with a bud tie so that
Definition
it is held firmly in place against the rootstock
Term
An inspection to see if the bud has grown and is alive should be made in about
Definition
three weeks
Term
The spring after the bud is attached, the seedling rootstock top is cut off where?
Definition
Directly above the bud
Term
In the development as a new bud, what must be pinched off as they appear on the rootstock below the bud?
Definition
suckers
Term
The new plant may be transplanted to a permanent site in
Definition
1 - 2 years
Term
The following occurs in budding, but not in grafting
Definition
vegetative leaf bud is used, and placed closer to the ground on the rootstock
Term
chip budding is widely used to propagate ____ as well as other plants
Definition
Grapes
Term
What is the biggest advantage in using chip budding?
Definition
it can be done when the plant is not in active growth
Term
Layering is used to propagate plants that are
Definition
difficult to grow from seed
Term
The main difference in propagating by layering as opposed to cuttings is that in layering, the newly propagated parent plant is
Definition
cut from the parent plant, layering is remains attached to the parent plant
Term
Which of the following plants are commonly propagated by layering?
Definition
black raspberry, boysenberry, strawberry, red raspberry, African violet
Term
When a rooted layer being transplanted had a small root system and a large top, the plant's moisture requirements are balanced by
Definition
using mulch to conserve moisture
Term
The age of the wood affects the speed at which layers root. Younger (one-year-old) wood generally roots
Definition
more rapidly than older wood
Term
In air layering, cutting the bark off the stem, known as girdling, does what?
Definition
stimulates root formation just above the point of girdling
Term
The cut area on the layered stem is dusted with a rooting agent to
Definition
cause roots to form faster
Term
The main reason for covering the sphagnum moss that is packed around the air layers with polyethylene plastic that
Definition
holds in moisture and allows that plant roots to breathe
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