potato tuber moth ( phthorimaea operculella )
DESCRIPTION
Potato Tuber Moth ( Phthorimaea operculella ). POTATO TUBER MOTH. Order : Lepidoptera Family : Gelechiidae Distribution : Cosmopolitan-tropical and subtropical Host : Potato, tomato, eggplant, tamarillo leaves (tree tomato). DESCRIPTION. Narrow silver-grey body with - PowerPoint PPT PresentationTRANSCRIPT
Potato Tuber Moth (Phthorimaea operculella)
POTATO TUBER MOTH
Order: LepidopteraFamily: GelechiidaeDistribution: Cosmopolitan-tropical and
subtropicalHost: Potato, tomato, eggplant, tamarillo leaves
(tree tomato)
DESCRIPTION•Narrow silver-grey body withGreyish brown wings marked by small, dark specks•Body length: 10 mm
Wings are fringed
DAMAGE
• Leaves and tubers
Damage symptoms on leaves
Damage symptoms on tubers
Life-cycle
Eggs: laid singly on underside of leaves and exposed tubers
Eggs are small,spherical, translucent,and range in color fromwhite or yellowish to lightbrown.
150-200 eggs laid
Life-cycleLarva: Larva 1-2 mm long and grows through 4 instars to reach 15-20 mm long.All larvae have dark brown head.
Larva first mine into leaves and later into stem. Larval period lasts 2-3 weeks in summer.
Larvae also excavate tunnels in the tubers
Life-cyclePupa: Pupa are formed in a silken cocoon covered with soil particles and debris for camouflage.
Pupation occurs on dead leaves or on stored potatoes.
Moth appears in 7-10 days
Life-cycle is completed in about one month. As many as 5-6 generations occur in a year.
The moth mainly hibernates in the form of pupae and emerges with the onset of warm dry conditions.
Management
• Use clean seed• Destroy tuber moth infested tubers, plant
debris and volunteer plants• Do not expose the tubers (earthing up)• Sort out the tubers before storage.