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Pests of Paddy

Pests of Paddy. LEAF, STEM AND SEED SUCKING INSECTS. Nephotettix spp. Homoptera:Cicadellidae Bena hijau /leafhopper Suck the leaf, stem and rice grain ( biji ) Pest: nymph and adult Transmits virus diseases such as tungro ( N. virescens ), yellow dwarf, yellow-orange leaf

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Pests of Paddy

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  1. Pests of Paddy

  2. LEAF, STEM AND SEED SUCKING INSECTS

  3. Nephotettix spp. • Homoptera:Cicadellidae • Benahijau/leafhopper • Suck the leaf, stem and rice grain (biji) • Pest: nymph and adult • Transmits virus diseases such as tungro (N. virescens), yellow dwarf, yellow-orange leaf • Simptom: leaf yellowish and dry,small grain,, sterile, plant stunted

  4. Nephotettix virescens

  5. Control measures: • 1) dry the field after harvesting • 2) destroy the remaining rice plants after harvesting( esp. those which are infected) • 3)area with severe damage: use insecticide one week after seeding • Racun: 0.1% carbaryl, dimethoate • Biocontrol: Miridae (hemiptera), nematode parasitize nymph & adult

  6. Nilaparvata lugens • Homoptera: Delphacidae • Bena perang/ brown planthopper • Suck the sap of a growing padi plant( near water level) • Nymphs and adults cause damage

  7. A high density of population  HOPPERBURN • crops dries up in round patches, brownish color • Disease: ragged stunt, grassy stunt

  8. draining the rice field for 3-4 days is recommended during the early stage of infestation. • Nitrogen application can be split to reduce BPH buildup. • Maintaining a free-rice period could also decrease the build-up of population • Spray with acephate 0.1% a.i, phenthoate 0.05% a.i

  9. Biocontrol: use of spiders (predators) eg: Lycosapseudoannulata (20 BPH/day)

  10. Scotinophoracoarctata • Hemiptera:Pentatomidae • Kutuberuang/rice black bug • Adult & nymph • Suck sap from base of padi stem

  11. Weakening padi, seed production decrease,, severe: padi stunted, leaves turn reddish brown • Control: During early infestation, the water level in the field may be raised for 2-3 days to force the insects to move upwards. • Flooding the fields can also cause higher egg mortality. • After harvest, fields might be plowed to remove remaining insects

  12. Sogatella furcifera • Homoptera: Delphacidae:planthopper • Adult and nymph • Suck the sap from leaf blade and leaf sheath • Symptom; reddich brown patches on leaf, for serious infestation you can see yellow patchesControl: drain off water 2-3 days,then flood again (same like Nilaparvatalugens)

  13. spray gamma BHC, endosulfan, carbaryl ( all 0.1% a.i) Use Metarhiziumanisopliae(fungus) foliar spraying of insecticides directed at the base of the rice plant is the most effective

  14. PENGOREK BATANG(STEMBORER)

  15. Scirpophaga incertulas • Lepidoptera:Pyralidae • Yellow stemborer • The caterpillars bore into the rice stem and hollow out the stem completely • the early stages of growth, drying up of young leaves or death of tillers.  Attack is more common at 'bunting' stage and then the ear may not emerge and if it does ;it may be empty

  16. Control: control measures e.g. spraying surface of water at maximum tillering may be useful

  17. PEMAKAN DAUNleaf eater

  18. Spodoptera litura • Lepidoptera:Noctuidae • Ulatratus/armyworm • Eat leaf-blades, particularly serious in nursery and dry padi. • Control: • Dust 25 lb per acre of       a mixture of 5% DDT       dust and wood ash.   • 2.  If possible, flood the       nursery.   • 3.  Spray with 3 pints       25% DDT emulsion       in 40-80 gallons of       water per acre.

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