Insects of Rice
Rice is the most important cereal crop of many Asian countries.
Also read:
Content:
- BPH.
- Earhead bug.
- Gall midge.
- GLH.
- Grasshopper.
- Hispa or rice hispa.
- Horned caterpillar.
- Leaf roller.
- Mealy bug.
- Rice case worm.
- Skipper or rice skipper.
- Stem borer.
- Swarming caterpillar.
- Thrips.
- White backed plant hopper.
- Whorl maggot.
- Yellow hairy caterpillar.
(1). BPH or Brown Plant Hopper
Scientific name: Nilaparvata lugens
Family: Delphacidae
Identification: Presence of a prominent tibial spur on the 3rd leg.
Symptom of damage: Hopper burn.
Management: Triaziphos.
Other:
ETL is 1 BPH per tiller.
Vector of grassy stunt virus.
Also read: Introduction to major insect-pests of maize
(2). Earhead bug
Scientific name: Leptocorisa oratoria
Family: Alydidae
Identification
Bug is slender.
Characteristics odour from adult.
Symptom of damage
Chaffy grains.
Black spot of feeding surface.
Management
ETL: 5 bugs per eaehead.
Chemical: Quinalphos.
Other: Another name is gundhi bug.
(3). Gall midge
Scientific name: Orseolia oryzae
Family: Cecidomyiidae
Identification
It is fly.
Yellowish green.
Similar to mosquito.
Symptom of damage
Formation silver shoot.
No panicles.
Management
ETL: 10 % silver shoot.
Parasite: Platygaster oryzae.
Other: Silver shoot is also known as onion leaf.
(4). GLH or Green Leaf Hopper
Scientific name: Cicadella viridis
Family: Cicadellidae
Identification: Bright green adults with black spots.
Symptoms of damage: Yellowing/drying of leaves from tip.
Management: 5 insects per hill before flowering.
Other: Vector of tungro virus.
(5).Grass hopper
Scientific name: Hieroglyphus banian
Family: Acrididae
Identification
Body is green.
Transverse black lines above the pronotum.
Symptom of damage
Irregular feeding on leaves.
Presence of left midrib.
Management: Chlorpyriphos.
Other: It is polyphagous in nature.
(6). Rice hispa
Scientific name: Dicladispa armigera
Family: Chrysomelidae.
Identification
Spiny body is the characteristics identification mark.
Symptom of damage
Irregular translucent white patches.
Presence of blisters near leaf tip.
Field burnt appearance.
Management: Systemic insecticide.
Other: Adult beetle is known as imago.
(7). Rice horned caterpillar
Scientific name: Melanitis ismene
Family: Nymphalidae
Identification: Brown wings with characteristics black spots on all wings.
Symptom of damage
Marginal sides of leaves are damged by insects.
Management: Systemic insecticide
Other: Erratic flying.
(8). Leaf roller
Scientific name: Cnaphalocrocis medinalis
Family: Crambidae
Identification
Yellowish green translucent larva.
Adult is a moth with horizontal bands across wings.
Wing margins are black.
Symptom of damage: Longitudinal folded leaves.
Management: Trichogramma chilonis is an egg paraditoide.
Other: ETL is 10% damaged leaves.
(9). Mealy bug
Scientific name: Brevennia rehi
Family: Pseudococcidae
Identification: Appearance is reddish.
Symptom of damage: Stunted plants in patches.
Management: Systemic insecticides.
Other: Crowded nymphs in leaf sheath.
(10). Rice case worm
Scientific name: Paraponyx stagnalis
Family: Crambidae
Identification
Larva: Pale yellow translucent larvae.
Head is red.
Adults have pale brown wavy markings.
Symptom of damage
Whitish papery leaves.
Presence of leaf case.
Management: Systemic insecticide.
Other: Another name is rice case bearer.
(11). Rice Skipper
Scientific name: Pelopidas mathias
Family: Hesperiidae
Identification: Slender green larva.
Light brown wings.
Wings have orange markings.
Symptom of damage:
Downside rolling of leaves.
Webbing is present.
Management: Systemic insecticide.
Other: Another name is black branded swift.
(12). Stem borer
Scientific name: Scirpophaga incertulas
Family: Crambidae
Identification:
Pale yellow with dark head.
Males are reddish brown.
Symptom of damage: Formation of dead heart is the characteristic symptom.
Management: Trichogramma japonica is egg parasitoid.
Other: Dead heart ETL is 25%.
(13). Swarming caterpillar
Scientific name: Spodoptera mauritia
Family: Noctidae
Identification:
Yellowish white lateral stripes.
Adult is dark grey brown.
Symptom of damage: Presence of cut seedlings in large quantity.
Management: Systemic insecticide
Other: Another name is army worm.
(14). Thrips
Scientific name: Stenchaetothrips biforms
Family: Thripidae
Identification:
Larvae are pale yellow.
Adults: Dark brown slender adults with hair-fringed wings.
Symptom of damage:
Discolored leaves.
Terminal rolling of leaves.
Management: Systemic insecticide.
(15). White backed plant hopper
Scientific name: Sogatella furcifera
Family: Delphacidae
Identification: White band on back.
Symptom of damage:
Hopper burn is the characteristic symptom.
Management: Systemic insecticide
(16). Whorl maggot
Scientific name: Hydrellia sasakii
Family: Ephydridae
Identification:
Larva is yellow.
Adult is a dark gray fly.
Symptom of damage:
Yellowish white blotches.
Drooping of tip leaves.
Management: Systemic insecticide.
Other: ETL is 25% damaged leaves
(16). Yellow hairy caterpillar
Scientific name: Psalis pennatula
Family: Erebidae
Identification:
Yellowish brown larva with red stripes.
Moths have dark brown colour forwings.
Symptom of damage: Defoliation of leaves.
Management: Systemic insecticide.