Paddy pest

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1. INTRO PRESENTERS; ARSHAD KHAN AND TARIQ RAHIM TOPIC; PADDY PEST

2. CONTENTS SYSTEMATIC POSITION DISTRIBUTION LIFE HISTORY CONTROL METHOD

3. THE RICE BUG PHYLUM: ARTHROPODA CLASS: INSECTA ORDER: HEMIPTERA FAMILY: COREIDAE GENUS: LEPTOCORISA SPECIES: VARICORNIS

4. DISTRIBUTION Present throughout india and pakistan and bangladish Commonly called Gundhi kira in india

5. Distribution in pakistan

6. 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

7. 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

8. Period is from july to november Winter breeding rate is lowered

9. Control Cultural method Remove the alternate food at off season Draining out water from infested field for 3-4 days Crop rotation is advisible

10. 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

11. Mechanical control Collection of bugs with hand and destrication is qa useful mechanical method BIOLOGICAL CONTROL Cicendalasixpunctata pentatumid prey upon the adult of Leptocorisa

12. THANKS

13. 2.THE BROWN PLANT HOPPER SYSTEMATIC POSITION; PHYLUM: ARTHROPODA CLASS: INSECTA ORDER: HEMIPTERA FAMILY: DELPHACIDAE GENUS: NILAPARVATA SPECIES: LUGENS

14. DISTRIBUTION Found where rice is found It is brown in colour,female is larger 4-5mm Female are winged

15. 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%

16. 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

17. 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%

18. 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