Loquat diseases By Allah Dad Khan Provincial Coordinator IPM KPK MINFAL
1.
2. Loquat Diseases
A
Lecture To ToT trainees ( FFS)
By
Mr. Allah Dad Khan
Provincial Coordinator IPM KPK
MINFAL Pakistan
3. The canker appear on bud scars, twigs or in
crotches. Small circular brown spots appear
around a leaf scar or superficial wound. As the
canker enlarges the centres become sunken with
the surrounding healthy bark. The fungus
perpetuates itself on the trees in bark cankers.
Control:
Remove the cankers and decorticate along with 2
cm of healthy bark. Apply Bordeaux paste on the
cut ends and wounds. Spray Bordeaux mixture
2:2: 250 twice at an interval of one month.
4. It is caused by Phytophthora species. Some are
of the view that it is caused by Diplodia
natalensis. The fungus produces canker from
ground level to point from where scaffolds
emerge. The rot girdless the trunk during 2-3
years. Affected trees flower profusely. The
foliage become yellowish green. The tree show
wilting and ultimately dry up completely.
Control:
(i) Avoid flooding the orchard.
(ii) Uproot the infected trees and destroy.
(iii) Scrap the infected portion and cut some
healthy bark also. Apply Bordeaux paint. Spray
the trees with Bordeaux mixture 2:2: 250.
5. Symptoms
Fire blight is a very serious
bacterial disease that first
manifests in trees as a watery
substance that drips from
cankers on the branches, twigs
or trunk. The substance
eventually darkens, leaving
stains on the branches or
trunk. Fire blight can shrivel
and blacken fruit, and seriously
damage the overall health of
the tree. To help combat fire
blight, prune away infected
branches with sterile
equipment, and burn all
infected material. Chemical
controls are available to help
prevent future outbreaks
6. Phytophthora root rot is a soil-borne disease that infects
the loquat through its root system. This disease develops in
the soil during long periods of excessive moisture. Loquat
trees located in poorly drained areas are especially
susceptible to this disease. Infected loquat trees will
display symptoms that include wilting, loss of vigor, dull
green or yellow foliage and dieback. Symptoms often
appear on a small amount of branches and twigs before
overwhelming the tree. Full infection often occurs over
several years. Control phytophthora with water
management. The loquat's planting area should be well-
drained and the tree should never be overwatered. Prune
away severely infected areas with sterile shears.
Fungicidal sprays are effective on ornamental loquats
when used in combination with pruning
Symptoms
7. Verticillium wilt is a soil-borne, fungal pathogen.
This fungus can live many years in the soil, even
without a host. Verticillium wilt infects the
loquat tree through its root system, causing
chronic symptoms. These symptoms include
foliage yellowing and scorching, growth stunt,
heavy seeding, and weakening and dieback of
branches and stems. Infected loquat trees may
also experience leaf curl, defoliation and vein
yellowing. Fungicidal treatments will not
control, prevent or cure verticillium wilt.
Remove severely infected trees and replace with
verticillium wilt-resistant vegetation.
Symptoms