2. Primary source : seed borne
oospores
Secondary source : irrigation
water
Causal organism :
Pythium
aphanidermatum.
Symptoms : pale green
seedling, brownish
water soaked lesion on
the basal portion of
stem, girdling of stem,
rot of tissue and
collapse of seedlings.
3. MANAGEMENT:
Raising nursery in light soil with proper
drainage
Rabbing – burning farm trash on the surface
of beds.
Sowing seeds on raised beds.
Seed treatment wuth Thiram or Captan @ 2-
3g per kg.
Soil drenching with Bordeaux mixture 1% or
Copper oxychloride 0.3% or Metalaxyl 0.2%.
4. Primary source :
Seed borne
Secondary source :
Wind borne conidia
Causal organism :
Colletrotrichium
capsici
Symptoms : circular
sunken spots with
black margins on
fruits,premature fruit
drop.
5. Management:
Seed treatment with Captan or Thiram 3-4g
per kg of seeds.
Collect seeds from disease free plants.
Removal and destruction of Solanaceous
weed hosts and infected plant debris.
Spray three times Mancozeb @ 0.25% or
Captan 1.5% before flowering, at fruit
formation stage and 15 days after second
spray.
6. Primary source : crop debris
Secondary source :
conidia
Causal organisms :
Leveillula taurica
Small, circular whitish
spots.
At later stages entire leaf
surface is with dirty white
growth.
Management: Spray
wettable Sulphur 0.3% or
Dinocap or Carbendazim or
Tridemorph 0.1%
7. Primary source :
Seed borne
Secondary source :
Rain splashes
Caused by
Xanthomonas
vesicatoria
Small, irregular, black
greasy lesions
Water soaked raised
spots with white halo.
Scabby surface
8. MANAGEMENT:
Collect seeds from healthy fruits.
Seed treatment with Copper oxychloride 2g
per kg.
Field sanitation
Spray twice with Streptocycline 0.1g mixed
with Copper oxychloride 3g per litre of water
@ 15 days interval.
9. Transmission by >>>>>
White fly ( Bemisia
tabaci)
Causal organism :
Chilly leaf curl virus.
Rolling and crinkling of
the leaves.
New leaves show
chlorosis and old
leaves become
weathery and brittle.
Few fruits set that too
small.
10. Transmission by>>>>> Aphis gossypii, A.evonymi , Myzus
persicae
Caused by TMV, CMV
Stunting and poor
devolopment of plants.
Mosaic mottling seen
Abnormal shape of
leaves
Marginal rolling.
11. MANAGEMENT:
Collection of seeds from healthy fields.
Seed treatment with Trisodium
orthophosphate 16% for 30 minutes followed
by washing with clean water.
Roughing and destruction of infected plants
to remove foci of inoculum.
Raising barrier crops to intercept aphid
vectors from neighbouring fields.
Spray systemic insecticides to kill vectors.
