PESTS OF RICE (BORERS AND FOLIAGE FEEDERS) :: Major Pests :: Whorl Maggot

8. Whorl maggot: Hydrellia sasakii (Ephydridae: Diptera)

Distribution and status: Philippines Host range: Rice, Cyanodon dactylon and Echinochloa crusgalli Damage symptoms: Yellowish white longitudinal marginal blotching with hole in a few places on the emerging leaves. Leaves become shriveled. Plant gets stunted and maturity is delayed.  Maximum damage is observed on 30 DAT. ETL - 25% damaged leaves
	Pinholes and patches (IRRI)

Bionomics: The adult is a small dull grey fly.  Maggot is 2 mm in length and feeds on the tender tissue inside the whorl.  It is yellowish white in colour.

Rice whorl maggot (IRRI)

Management

• Apply carbofuran 3G 10 kg or cartap hydrochloride 4 G 18.75-25.0 kg or fipronil 0.3 G 16.70 - ­ 25.0 kg shortly after transplanting.
• Spray endosulfan 35 EC 1.0 L or quinalphos 25 EC 1.0 L or  ethofenoprox 10 EC 500-750 ml or fipronil 5 SC 1.0 -1.5 L or in 500 L water/ha.

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