CRP001 (SYMPTOMS)

Question 1

premature falling of leaves,
fruits or flowers due to early
laying down of the abscission
layer

Answer 1

Abscission

Question 2

premature falling of leaves,
fruits or flowers

Answer 2

Abscission

Question 3

It causes dark, sunken
lesions on leaves, stems,
flowers, and fruits

Answer 3

Anthracnose

Question 4

term applied to the
sudden death of young
buds, inflorescence or young
fruits.

Answer 4

Blast

Question 5

flow of plant sap from
wounds.

Answer 5

Bleeding

Question 6

An extensive, usually sudden,death of host tissue, such as leaf blight.

Answer 6

Blight

Question 7

large, irregular spots on
leaves or fruits with necrotic
injury of epidermal cells.

Answer 7

Blotch

Question 8

an overgrowth of tissue
formed in response to injury
in an effort of the plant to
heal the wound

Answer 8

Callus

Question 9

an often-sunken necrotic
area with cracked border
that may appear in leaves,
fruits, stems and branches

Answer 9

Canker

Question 10

yellowing caused by some
factor other than light such
as infection by a virus or a
mycoplasma

Answer 10

Chlorosis

Question 11

abnormal bending or
curling of leaves caused by
over-growth on one side of
the leaf or localized growth
in certain portions

Answer 11

Curling

Question 12

rotting of seedlings prior to
emergence or rotting
seedling stems at an area
just above the soil line

Answer 12

Damping-off

Question 13

a drying backward from
the tip of twigs or branches.

Answer 13

Die-back

Question 14

yellowing of normally green
tissues caused by inadequate
light

Answer 14

Etiolation

Question 15

clustering of plant organs
around a common focus

Answer 15

Fasciculation or Fasciation

Question 16

extremely tiny spots on
leaves, fruits, stems, etc.

Answer 16

Flecks

Question 17

are swollen masses of
abnormal tissue that range
in size from small to quite
large

Answer 17

Galls

Question 18

oozing out of viscid gum
from wounds in bark

Answer 18

Gumming or gummosis

Question 19

the host’s juices exudeor
leak out from soft-rotted
portions

Answer 19

Leak

Question 20

the presence, usually on
leaves, of variegated
patterns of green and yellow
shades with sharply defined
borders

Answer 20

Mosaic

Question 21

the variegation is less
defined than mosaic and the
boundaries of light and dark
variegated areas are more
diffused

Answer 21

Mottling

Question 22

an infected fruit is
converted to a hard, dry,
shriveled mummy

Answer 22

Mummification

Question 23

metamorphosis of sepals,
petals, stamens or carpels
into leaf-like structures.

Answer 23

Phyllody

Question 24

definite depressions or pits
are found on the surface of
fruits, tubers, and other
fleshy organs resulting in a
pocketed appearance

Answer 24

Pitting

Question 25

Infected plants displays white powdery spots on the leaves and stems

Answer 25

Powdery mildew

Question 26

shortening of the internodes of shoots and stems forming a crowding of the foliage in a rosette

Answer 26

Rosseting

Question 27

disintegration and decomposition of host tissue

Answer 27

Rotting Additional info: Any plant part may suffer from rot. a. A dry rot is a firm, dry decay b. A soft rot is a soft, watery decomposition.

Question 28

superficial brownish roughening of the skin of fruits, tubers or other fleshy organs usually due to suberization of epidermal or subepidermal tissues following injury to the epidermis

Answer 28

Russetting

Question 29

commonly seen as coloured powder, Plants may appear stunted, chlorotic (yellowed), or otherwise discolored

Answer 29

Rust

Question 30

a perforated appearance of a leaf as the dead areas of local lesions drop out

Answer 30

Shot-hole

Question 31

symptoms appear at flowering, and infected plants are unable to produce grain

Answer 31

Smut

Question 32

a localized necrotic area also referred to as a lesion

Answer 32

Spot Additional info: Individual spots may be circular, angular or irregularly shaped

Question 33

long, narrow necrotic lesions on leaves or stems

Answer 33

Stripe or Streak

Question 34

the leaf veins are translucent or pale while the rest of the leaf is its normal color

Answer 34

Vein clearing

Question 35

development of chlorophyll in tissues or organs in which it is normally absent

Answer 35

Virescence or greening

Question 36

may be due to an infectious agent or lack of water

Answer 36

Wilting