Rice hispa (Dicladispa armigera, Chysomelidae Coleopteran)

• Oligophagous pest, Poaceae, serious pest for young rice

Damaging stage: grub, adult

Damaging symptoms:

• Parallel white streak between veins.
• Severe infestation leaves become white and later die.

Identification

• Adult: Long spine on prothorax and elytra,10 spine along lateral margin, and 9 dorsal spin, Female scrapes the tender portion of leaf epidermis and deposit
• 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 miners between the upper and lower epidermis, and full-grown larvae scrape the leaf. Pupa inside the leaf.

Egg   ………> 4-5days….> Grub…….> 7- 12 days……> Pupa..> 4-5 days…..> Adult

Management

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