CRUCIFEROUS
VEGETABLES
- Diamond back moth Plutella
xylostella : Plutellidae: Lepidoptera.
vLarva: 8-12
mm long, pale yellowish green in color, pointed at both the ends with fine
erect black hairs scattered over the body.
vAdult:
Small, greyish brown having pale whitish narrow wings with inner margins
yellow, three pale whitish triangular markings on hind margins of each
forewing. At rest a dorsal median patch of three diamond shaped yellowish white
spots clearly visible by joining both forewings. Hind wings have a fringe of
long hairs.
Symptoms of Damage
v First
instar larvae mine epidermal surface of leaves producing typical white patches.
Larvae, second instar onwards feed externally making holes on the leaves and
soil them with excreta. Heavy infestations leave little more than the leaf
veins
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