Transcript Pests of Paddy

Pests of Paddy
LEAF, STEM AND
SEED SUCKING
INSECTS
Nephotettix spp.
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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
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
Nilaparvata lugens
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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)
Scotinophora coarctata
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Hemiptera:Pentatomidae
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
Sogatella furcifera
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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 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
PENGOREK
BATANG
(STEMBORER)
Scirpophaga incertulas
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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
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Control: control measures e.g. spraying surface
of water at maximum tillering may be useful
PEMAKAN DAUN
leaf eater
Spodoptera litura
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Lepidoptera:Noctuidae
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.