Pests of Paddy

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Pests of Paddy
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LEAF, STEM AND SEED SUCKING INSECTS
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Nephotettix spp.

• HomopteraCicadellidae
• 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
• Simptom leaf yellowish and dry,small grain,,
  sterile, plant stunted

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• Nephotettix virescens

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• 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

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Nilaparvata lugens

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

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

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• 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

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• Biocontrol use of spiders (predators) eg Lycosa
  pseudoannulata (20 BPH/day)

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Scotinophora coarctata

• HemipteraPentatomidae
• Kutu beruang/rice black bug
• Adult nymph
• Suck sap from base
  of padi stem

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• 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

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Sogatella furcifera

• Homoptera Delphacidaeplanthopper
• 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 Nilaparvata lugens)

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

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PENGOREK BATANG(STEMBORER)
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Scirpophaga incertulas

• LepidopteraPyralidae
• 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

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

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PEMAKAN DAUNleaf eater
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Spodoptera litura

• LepidopteraNoctuidae
• Ulat ratus/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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• Leaf folder
• Longitudinal and transparent whitish streaks on
  damaged leaves
• Tubular folded leaves
• Leaf tips sometimes fastened to the basal part of
  leaf

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• Eg of species
• Cnaphalocrocis medinalis

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• Eg of species
• Cnaphalocrocis medinalis
• Marasmia patnalis