GEOGRAPHICAL DISTRIBUTION, HOST RANGE AND PARASITOIDS OF SERPENTINE LEAF MINER, Liriomyza trifolii (Burgess) IN SOUTH INDIA
Survey conducted for assessing the incidence and severity of the serpentine leaf miner, Liriomyza trifolii (Burgess) in Andhra Pradesh, Karnataka, Maharashtra and Tamil Nadu during November, 1992 and February, 1993 revealed its occurrence in all these states. Its damage was characterised by sharply curled and contorted leaf mines which had a continuous black trail of frass. It was recorded on 70 host plants covering fibre crops, pulses, vegetables, ornamentals, green manures, fodder, narcotics and weeds belonging to 16 families. The incidence was relatively severe on tomato, okra, field bean, ridge gourd, cucumber, potato, castor and cotton. The severity of damage varied depending on the plant height. Leaves in the top canopy had fewer mines as compared to leaves in the middle and bottom canopy. A few indigenous parasitoids have been recorded on the insect.
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