Rice hispa (Dicladispa armigera, Chysomelidae Coleopteran)

• Oligophagous pest, poaceae , serious pest for young rice

Damaging stage: grub, adult

Damaging symptoms:

• Parallel white streak between
• Severe infestation leaves becomes white and later

Identification

• Adult: Long spine on prothorax and elytra ,10 spine along lateral margin and 9 dorsal spin,Female scrape the tender portion of leaf epidermis and deposite
• Grub :Legless, creamy white , inside the leaf tissue
• Egg: Tip portion of leaves ,inside the leaves.

Life cycle

On hatching young grub feed as leaf miner between upper and lower epidermis , full grown larvae scrape the leaf . pupa inside the leaf .

Egg –4-5 days –> Grub –7-12 days –> Pupa –4-5 days –> Adult

Management

• Parasitized :- bracon larvae
• Predator :- assasian bug
• Clip tip parts of leaf
• Collect and destroy
• Malathian dust @25-30 kg/ha, 50% Ec @2ml/ha