The document discusses three cashew nut diseases: 1) Water-soaked lesions on leaves, twigs, and young apples caused by a fungus that favors rainfall and high humidity. Management includes applying copper-based fungicide when buds expand through fruit set, except during dry periods. 2) Chlorotic spots on leaves caused by a fungus, spreading to the lower surface and causing leaves to shrivel and drop. Damage is most severe on dwarf varieties. 3) Angular cream lesions on seedlings and angular black lesions with chlorosis on mature trees caused by a fungus. Some dwarf varieties are resistant and the disease is widespread in Brazil.

2. Cashew nut Diseases
A
Lecture To ToT trainees ( FFS)
By
Mr. Allah Dad Khan
Provincial Coordinator IPM KPK
MINFAL Pakistan

3.  Water-soaked lesions on leaves, twigs, flowers or young
apples which develop into orange-brown or red lesions;
 Cause
 Fungus
 Comments
 Disease emergence favored by rainfall and high humidity
 Management
 A protective coating of copper-based fungicide on susceptible
parts of plant can prevent the disease; fungicide should be
applied when buds begin to expand through to fruit set but are
not required during dry periods
Symptoms

4.  Chlorotic spots on upper surface of leaves
which spread to lower surface as infection
progresses; dark-brown to black fungal
patches on leaves; leaves shrivelling and
dropping from plant
 Cause
 Fungus
 Comments
 Damage most severe on dwarf cashew
varieties
Symptoms

5.  Angular cream colored lesions with dark-brown
margins on leaves of seedlings; angular black lesions
with chlorotic halos on mature trees; defoliated
seedlings
 Cause
 Fungus
 Comments
 Some dwarf types of cashew are resistant to this
disease; disease is widespread in cashew growing
regions of Brazil
 Management
 Currently no control measures are used