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715Re: [Indianmoths] OHM - A bumper crop!

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  • Isaac Kehimkar
    Mar 10, 2007
      Dear Friends,
      Looks like we are going to have a bumper crop of Oleander Hawk Moths, as  one of the food plants, the Scholar's Tree Alstonia scholaris is now widely planted as an avenue tree, being evergreen, hardy and distasteful to cattle. Recently, I have been finding a good number of caterpillars around Mumbai (Bombay) on this tree. However, it seems to avoid Oleander (Nerium) - may be because  the toxins load is too high to digest.

      "Dr. Ankur Patwardhan" <ankur_patwardhan@...> wrote:
      can be found on Tabernaemontana divaricata (Vern. Tagar in Marathi) as well, which is commonly cultivated in backyards for flowers that are offred to deity.
      ------------ --------- --------- --------- --------- --------- --------- -
      Ankur Patwardhan, M.Sc. Ph.D
      Lecturer, Dept. of Microbiology, Garware College, Karve Road,Pune-411004. INDIA.
      Honorary Secretary, RANWA, Pune (www.ranwa.org)
      Member, IUCN Task Force on Cities and Protected Areas.
      Email: ankur_patwardhan@ vsnl.net
      Tele: (0) 9823812653
      ----- Original Message -----
      Sent: Thursday, March 08, 2007 11:43 PM
      Subject: Re: [Indianmoths] OHM - life cycle

      Hi Rahul,
      Nice photo. Here is a lifecycle of OHM. It was really
      interesting. The cat preferred to feed on flowers.
      When flowers were not available it fed on leaves.
      (Food plant : Alstonia scholaris or devil's tree or
      saptaparni or satvin )

      I have noticed 2 types of caterpillers of the OHM;

      one that changed colours as if it was changing its
      outfits in a fashion show (cat1). It changed from
      green to brownish black till the day of pupation.
      (Pics of all stages are attached)

      The other one which was initially green in colour,
      turned brown and did not change the colour thereafter
      (cat 2).

      Both pupated in soil. The moths emerged were more or
      less similar. The pupation period was 13 and 16 days
      respectively for cat 1 and cat 2.
      Is it sexual dimorphism? can anyone explain?


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