shala bakht hojy

1. IN THE NAME OF ALLAH
WHO IS THE MOST
BENIFICENT AND
MERCIFUL…….
AND WHO IS THE CREATER

2. Muhammad Ashir
BAGF14MO57

3. RICE LEAF FOLDER

4. Technical name :
Cnaphalocrosis
medinalis
Family :
Pyralidae
Order :
Lepidoptera
TAXANOMY

5. IDENTIFICATION

7. DAMAGE
 Larvae fold the leaves longitudinally
before feeding.
 They tie the leaf margin with the thread
like silk.
 The feed on green mesophyll of leaf
inside the folded leaf by scraping.
 Reduce the photosynthetic activity.
 Vegetative growth and yield is
hampered.
 Yield loss is maximum when flag leaf is

8. • Remove the grasses and weeds present in
the field.
•Ratooning of rice should be avoided
•Crop rotation.
•Use of resistant varieties.
•Use of light traps.
BIOLOGICAL CONTROL
• use of trichgramma
CONTROL

9. CHEMICAL
CONTROL
875 ml of triazophos 40EC.
2.5 litres of chlorpyriphos
20EC.
1.4 Litres of monocrotophos
36SL in 250 litres of water
per ha.

10. WHITE BACKED
HOPPER
Technical Name:
Sogatella furcifera
Family:
Delaphacidae
Order:
Homoptera

11. Identification
oNymphs are white and grey
oAdults have white stripes at
end of abdomen
oSmall insect about 3-4.5 mm
oWinged insect with jumping
legs
oWings are white

12. Life cycle
Female lay 100-150 eggs
Eggs are laid on leaf sheath
1 week hatching period
3 weeks is the complete life
cycle
Female live about 2 weeks
Several generations in a year

13. Rice plants affected by tungro
Planthoppers on rice
stems
Courtesy: agritech.tnau.ac
Nature of Damage
In general, planthoppers generally remain
confined to plant stems and leaf sheaths while
leafhoppers occur on plant foliage. Due to this
habit, plant hoppers are overlooked by
farmers until appearance of ‘hoppe rburn’
symptoms in which crop starts drying and
lodging. However, during outbreaks, plan
thoppers can be witnessed in abundance on
leaves also.
On other hand, leafhoppers feed on leaves
and damage the crop. However, they are more
important as vectors of virus disease “tungro”
End Previous Next

14. Proper monitoring and judicious
use of fertilizers & irrigation hold
key to planthopper management
in rice. Monitoring can be done
by inspecting plant stems at
several places in all parts of field.
As plant stems are tapped, these
insects fall on water and can be
seen swimming. Likewise, light
traps can also be used for
monitoring plant hoppers.
Light trap
Planthoppers on plant stems
Management practices
(cont...)
End Previous Next

15. Spiders play very important role in
containing plant hoppers and therefore they
should be conserved through selective
pesticide application. This can be ensured
through use of granular formulation of
pesticides or leaving certain areas in the field
untreated. There is also practice of placing
rice straw bundles in field after transplanting
to encourage spider population build up.
Economic threshold level (ETL): 8-10
hoppers/hill Spiders
Management practices
End Previous Next

16. THANKS