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A presentation on rearing of helicoverpa armygera.
- 1. A Presentation On Rearingof Helicoverpa armigera and study of its lifecycle. Prepared by: Suraj Poudel B.Sc.Ag. 6th Sem IAAS, Paklihawa campus
- 2. Classification Fig: Helicoverpa armigera Kingdom: Animalia Phylum: Arthropoda Class: Insecta Order: Lepidoptera Family: Noctuidae Genus : Helicoverpa Species: armigera Common names: Chickpea pod borer, tomato fruit borer , cotton bollworm
- 3. Helicoverpa armigerais known as chickpea pod borer, tomato fruit borer , cotton bollworm and corn earworm. Helicoverpa armigera is polyphagous insect-pest. It is serious and most important pest of pulses. The major host are cotton , tomato , maize, chick pea, where as secondary host are alfa-alfa, tobacco, soybean, pea, pumpkin, squash, castor oil plant, jute etc. It’s larvae feed on leaf before pod formation and after pod formation ,they bore pod & damage seed which becomes unsuited for human consumption. INTRODUCTION
- 4. Life cycle ofHelicoverpa
- 5. The eggs aredeposited one by one or in groups of 2-3 on the upper surface of leaves and on reproductive organs, such as flowers, bracts, buds, on filaments of ears, panicles, and pubescent parts of maize stalks. The eggs are 0.5mm in diameter and take 2 to 5 days to hatch. Their color changes from white to brown. The black head of larva is visible before it hatches. The First Stage- Egg Stage
- 6. The larvalperiod lasts for 13 to 22 days. In the final 6th instar the larvae reach a length of 35-44mm. They are greenish and yellow to red- brown. The head is yellow with several spots and thoracic scutum has dark pattern. The dark stripes extend along the dorsal side, and one yellow stripe is located under spiracles on lateral side. The ventral part of larvae is usually light green. The Second Stage- Larva
- 7. The pupae developover 10-15 days in soil at a depth of 4 to 10cm. They overwinter in soil clods. The color varies from dark brown to red brown. The body length is 15-20mm. The Third Stage- Pupa
- 8. Moths vary incolor from reddish brown to whitish green brown. The adult has the body length of 12-20mm and a wing span of 30- 40mm. The forewings are brown with a single dark spot surrounded by fine markings. The hind wings are light brown with slightly dark margins. The Fourth Stage- Adult
- 9. It is verydestructive in nature. Young larva start feeding by scraping tender foliage, buds and flower. Later on, older larva attack on fruit making circular hole and enters inside the fruit. It feeds on the inner content of fruit and cause damage. The infested fruit becomes messy, watery and is filled with skin cast. Fruit ripens prematurely and becomes unfit for consumption. Larval development takes place inside the fruit. Nature of damage
- 10. Follow cleancultivation and remove all the infested fruit from field to reduce the borer incidence. Deep summer ploughing to expose pupal stage and destroy them by natural enemies or dehydrating by scorching sun. Use pheromone trap with Helilure @ 15 traps per hac for mass trapping of adult moth. Lure should be changed once in 15 days. Use trap crop like Calendula or tall and yellow type marigold. Release of Trichogramma chilonis in borer infested field for 6 times @ 50,000 parasitized eggs per hectare soon after appearance of moth in field. Spray Bt. based formulation like DIPEL or BIOLEP @ 3gm per lit water during evening time at 10 days interval. Spray neem based pesticides such as Margosom or Neemarin or Biomultineem @ 5ml per liter water Conserve natural enemies adapting suitable agricultural practices. Spray Thiodane 35% EC (Endosulfan) @ 1.5ml per liter water before the entry of larva into fruit. Management
- 11. To knowabout the methods of rearing insects. To be well acquainted with damaging effects of Helicoverpa armigera. To be able to know about the life cycle of Helicoverpa armigera. Objective
- 12. Materials: Rearingbottle or box Insect ( larva) Feed ( pea pod and leaf ) Methodology : The larva of Helicoverpa was collected from IAAS farm on 2019/2/6. Then, it was reared in plastic rearing box. Pea pod and leaf was given as feed to the larva. With the time, larva grows and became pupa and adult finally. The excreta produced by larva was removed and feed was changed daily. Rearing Period: From 2019/2/6 to 2019/3/8 Rearing Materials &methodology
- 13. Stage Appearance Lifecycle duration (days) Egg -------------- ----------- Larva Green color at beginning & later changes to greyish green with longitudinal stripes on dorsal part of body. 10 (larval rearing period) Pupa Greenish white and later changes to dark brick red color 15 Adult forewings are brown with a single dark spot surrounded by fine markings. The hind wings are light brown with slightly dark margins. 7(died due hunger) Observation
- 14. Photos of insectrearing Fig: larva casting off to become pupa Fig: pupae after casting off larval skin
- 15. Photos of insectrearing Fig:pupa of Helicoverpa armigera at initial stage Fig: pupa of Helicoverpa armigera at final stage
- 16. Photos of insectrearing Fig Adult of Helicoverpa armigera Fig: Helicoverpa armigera (dead) and pupal exuvae
- 17. • Finally, therearing of Helicoverpa armigera (female) was done with proper observation. • The different life stages of the insect was studied. • We reared insect and observed them as they pass through different stages. • Insect rearing was not only educational, but also found to be enjoyable. Conclusion
- 18. • Bozsik A,2007. The damage of cotton bollworm (Helicoverpa armigera Hübner) on Brugmansia × candida in Hungary • Ditman LP, Cory EN, 1931. The corn earworm: biology and control. Bulletin of Maryland Agricultural Experiment Station, 328:443-482. • https://en.wikipedia.org/wiki/Helicoverpa_armigera. Retrieved on: 2020/1/3 • https://www.cabi.org/isc/datasheet/26757#toreferences Retrieved on: 2020/1/3 References