Phytobacteriology Flashcards
(13 cards)
0
Q
Diagnostics
A
Fufill kochs postulates
Convetional ID
Modern ID
1
Q
Symptoms
A
Leaf spots- intercellular movement Excrescenes and galls near soil line Tumors Wilting Necrosis and cankers Rotting
2
Q
Epidemiology
A
Humidity and temp Host nutrition Wounding/natural openings Chemotaxis Biofilms QS
3
Q
Prevention and control
A
Exclusion- clean seed,pathogen free propagated mat,quarantine
Eardication- crop rotation,physical and chemical,cultural,antibiotics
Protection- bacteriocides,cultural,biological,QS
4
Q
Fire blight
A
Pome fruit trees
Agent: erwinia amylovora
Epidemics- no known pattern
5
Q
Symptoms fire blight
A
Canker blight Ooze infected tissue Blossom blight Shephards crook Fruit infection Shoeot blight Trauma blight Rootstock blight
6
Q
Disease cycle fire blight
A
Infection occur only- susceptible condition,pathogen inoculum,env conditions suitable Overwinter living bark 2 cankers: determinate,indeterminate Droplets bacteria on bark Insects rain aerosols Flower coloniz
7
Q
Detection fire blight
A
PCR primers FAMES DNA seq Immunological techniques HR
8
Q
Management fire blight
A
Strict quarantine
Remove infected tissues
Prevent infection
Avoid highly susceptible cultivars
9
Q
Bacterial wilt
A
Destructive- hot and wet seasons Plants wilt and die suddenly Ralstonia solanacearm Similar symp lack water Plant wilt without yellowing Tuber- discoloured vascular ring
Creamy exudate on ring
10
Q
Moko disease
A
Banana,plantains,heliconia Yield loss Yellow mature leaves Leave wilt an collapse Vascular tissue discoloured.fruit- internal rot
11
Q
Survival moko
A
Plant material
Irrigation water
Soil
12
Q
Management moko
A
Quarantine Cultural Chemical and soil Biologicak Resistant/ tolerant plant stock
