ABS 360 ARIZONA STATE UNIVERSITY Topic 11 – Citrus 2020.pdf

Kye AuClaire

ABS 360

Topic 11 – Citrus

Terms Defined

oBudding

The insertion and enclosure of a single vegetative “bud chip” from one

plant into an opening cut with a knife in the bark of another plant to

propagate a desired change of variety or appearance.

Rootstock

A plant with a healthy, established root system, that has another

plant grafted or budded onto it. Once the graft or bud union is

established, the majority of the shoot portion of the rootstock plant

is removed.

Scion

A detached shoot or twig containing buds from a woody plant that

is grafted onto a rootstock.

Sucker

A vigorous shoot that grows rapidly from the lower portion of a

mature tree or shrub.

Citrus cold tolerance

4:22

The younger the plant, the more cold sensitive

Cold tolerance and methods of cold protection

5:34

Citrus heat tolerance

Correlated to density of canopy

Denser canopy is more heat tolerant

Relative ranking of heat tolerance

o6:40

Heat tolerance and methods of heat protection

7:05

Citrus management practices for heat tolerance

Maximize growth and canopy spread

8:26

Difference between a standard semi-dwarf and dwarf citrus tree

Definitions: 9:20

Citrus Video

oCitrus comes from old world of China – came here from Christopher Columbus

oLimitations are freezing temperatures

oCitrus varies in color and size, fragrances

oOrange is hardy citrus, cumquat

oTangerine

oTangelo

Grapefruit and mandarin