Cabbage butterfly (Pieris brassica nepalensis , Pieridae , lepidioptera)

Damaging stage : larvae

Symptoms of damage : soon after hatching scrap the leaf surface, subsequent instar eats leaf from margin inward . In severe condⁿ , defoliation of leaf .

Identification

• Egg : yellow, cluster on lower side of side .
• Larvae : greenish to yellow, 4-5 longitudinal streak on dorsal part of the body, many black spot o joint segment .
• Pupa ; pupation on plant debris, wall , branches and other plant parts in hanging
• Adult : forewings of female have two central black spot and those black spot on inner side of forewings of male . one black spot on costal margin of forewings of both male and

Life cycle

Eggs —4-6 days—-> Larva —3-4 weeks —> Pupa —-2 week –> Adult

Management

• Natural predator : asssaian bug ,paper
• Egg parasitoid : trichogramma wasp
• Larval parasitoid : apenteles glomeartu, cortesia glomeratus .
• Cow urine (1:7-10 ratio) with water acts as a repellent or antifeedant and garlic and neem solⁿ also acts as a antifeedant and repellent .
• Bacillus thuringiensis e dipel @ 0.5 g/l of water.
• Cypermethrin 25% EC @ 200ml/liter .