9. NATURE OF DAMAGE
• Active insect, Long leged ,adult measures
about an inch in length
• Infect paddy plant when come to flower
• Sucking mouth parts are used to suck out milk
from grains which soon shrivel
• It caused 5 – 25% loss
10. Life history
• Female lay eggs symmetrically into 2 ,3 rows
• Eggs are dark coloured,oval and flattened at
top
• Eggs hatch in about a week
• Nymph have slender green body ,long legs
• 20 days to become adult
11. • Period is from july to november
• Winter breeding rate is lowered
12. Control
• Cultural method
• Remove the alternate food at off season
• Draining out water from infested field
for 3-4 days
• Crop rotation is advisible
13. Chemical method
• 5% BHC(benzene hexachloride) 15kg/ha
dusting is advised
• Malathion and methylparaathion dust is also
effective
• Spraying of 0.25% DDT or BHC or 0.04% endrin
atleast 2 weeks before harvesting
14. Mechanical control
• Collection of bugs with hand and destrication
is qa useful mechanical method
• BIOLOGICAL CONTROL
• Cicendalasixpunctata pentatumid prey upon
the adult of Leptocorisa
17. DISTRIBUTION
• Found where rice is found
• It is brown in colour,female is larger 4-5mm
• Female are winged
18. NATURE OF DAMAGE
• All stages of paddy are attacked by this pest
• Cluster of pest at base of plant feed on plant
sap which lead plant to turns yellow and then
dry up
• At start of this infestation round yellow
patches appears which soon turns brownish
due to drying of plant .this is called as
hopper burn.it demage crop upto 100%
19. Life history
• Copulation starts as female emerges and lay
eggs from next day
• Eggs in bunches of 3-10 are thurst within the
tissue of plant along with mid region of leaf
sheath and mid rib of leaves
• Female lay average of 200-250 eggs
• Eggs are white ,elongated.hatch about 8-10
days
20. • Nymph undergoes 5 instar within period of
15-20 days
• Life cycle is completed in 20-25 days
• Male life span is 15-20 days and female
is 15-30 days
• Optimum temperature for development is 30
and humidity is 70-90%
21. control
• Cultural method:
• Draining of water from field
• Use of resistant varieties of crop
• CHEMICAl METHOD:
• Spray of BHC,carbaryl fenthion and
quinalphos should be made as yellow
patches are seen in field
