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Pest of Paddy (Nilaparvata lugens (Order: Homoptera, Family: Delphacidae,…
Pest of Paddy
Nilaparvata lugens
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Control: H2O drain off 2-3 days, then flood again, spray acephate(0.1% a.i), phenthoate (0.05% a.i), spider (Lycosa pseudoannulata, 20 BPH/day)
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Disease: ragged stunt, grassy stunt
Scotinophora coarctata
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Damage: weakening paddy, seed production decrease
Severe: paddy stunted, leaves turn reddish brown
Control: raise H20 level 2-3 days, spray gamma BHC, endosulfan, carbaryl, (all 0.1% a.i), Metarhizium anisopliae (fungus)
Scirpophaga incertulas
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Symptoms: Drying up young leaves @ death of tillers, ear may not emerge @ emptied, attack more common at bunting stage
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Nephotettix spp.
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Damage: transmits virus disease such as tungro (N.virescens), yellow dwarf, yellow orange leaf
Symptom: yellowish and dry leaf, small & unfertile fruit, dwarfism
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Control
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Use pesticides (dimethoate, 0.1% carbaryl) 1 week after planting for severe damage
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Sogatella furcifera
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Control: drain off H2O 2-3 days, then flood again
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