Agriculture Reference
In-Depth Information
topworking
: rebudding or regrafting an existing tree with another
variety.
virus
: an extremely small pathogen consisting of infectious nucleic
acid and a protective protein coat. A virus can multiply only within
the living cells of a host.
trichome
: a leaf hair.
water-conducting tissue
: xylem vascular tissue that transports
water and minerals from the root system to other parts of a plant.
unthriftiness
: lack of plant vigor.
vascular
: associated with the conductive tissue (xylem and phloem)
of plants.
water-soaked
: diseased areas that appear wet and dark.
wilt
: loss of rigidity and drooping of plant parts owing to inadequate
water supply or excessive water loss by a plant.
vector
: a living organism that transmits a pathogen.
vegetative propagation
: the use of cuttings, bulbs, tubers, corms
and other vegetative plant parts to grow new plants.
xylem
: water-conducting and supporting tissue of roots, stems and
other plant parts.
viroid
: extremely small pathogen similar to a virus but lacking a
protective protein coat.
zoospore
: fungal spore with f flagella or tails, and capable of moving
i in w a t e r .
