S3E96 Cube Chatshaala: Exploring new ways of Learning

Meeting URL

webinar.hbcse.tifr.res.in

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Please click on the HBCSE Webinar above to join the CUBE ChatShaala
Timing:5.30 pm to 9.30 pm

As we do it daily, CUBE ChatShaala will be starting at 5.30pm and as a continuation of it, from 8.30pm, there will be MangoMapping workshop

Webinar will be recorded and recording link will be post in the same thread after the webinar.

Looking forward to your participation.
Thanks

325th day of CUBE ChatShaala: 12th February 2021
33 CUBists from 26 Centres had joined the webinar
Map

ANDHRA PRADESH
Nellore: R Srivalli, Tejasree B

ASSAM
Jorhat: Ishita Sonowal

DELHI
AND College: Aastha Ahuja, Arunima Dey, Dr Sarita Kumar
Dyal Singh College: Dr P. Chitralekha
Raj Yashwantrao Patil

GOA
Varun

HARYANA
Faridabad: Rahul Kushwaha
Hisar: Vatsal Arora

JHARKHAND
Kokar, Ranchi: Man Masih Beck
Morabadi, Ranchi: Rechel Tirkey

KERALA
Kandassankadavu: Lakshmy PJ
SN College, Nattika: Seethalakshmi
Palakkad: Shrudhiga, Sukanya P
Alapad, Thrissur: Vishnupriya

MAHARASHTRA
South Bombay: Arunan MC
Nerul: Drishtant M Kawale
HBCSE, Mumbai: DP
Thane: Harsh Chindarkar
Worli, Mumbai: Isha Pawle, Prarthana
Mumbai: Jaikishan Advani, Neelam Bhattarai
Dahanu, Palghar: Sachin Pradhan
Bandra, Mumbai: Saida Sayyed
Chembur, Mumbai: Suheet Sonawane
Prabhadevi, Mumbai: Yash Sheregare

UTTAR PRADESH
Moradabad: Kiran Yadav

WEST BENGAL
Kolkata: Batul Pipewala, Sukriti Maity

ChatShaala Feb 12, 2021
Summary of the first part of the discussion.

Aastha got 2 caterpillars on Jan 4, 2021 on pea pods which she suspected to Helicoverpa armigera.
She took a plastic box which had an incomplete division on its longitudinal axis.
She transferred the two caterpillars in those two separate divisions, and provided 4 pea seeds each in each division(total 8 seeds). She provided pea feed after 4 days. She observed the active movement of caterpillars which often even moved to another caterpillar’s division.
She cleaned the box by removing the previous feed and wiping the box with sanitizer and cotton.

According to Sarita Ma’am- The caterpillars are sometimes considered as pests as they feed voraciously on leaves and destroy a plant and they are a part of the food chain where several birds prey upon them. Adults on the other hand help in pollination.

Sarita Ma’am said that irrespective of butterfly or moth, the larval stage will have 3 developed legs and 4 underdeveloped legs.
They have 6 instar larval stages unlike Drosophila which have 3 instar larval stages.
Generally, moths sit on something with open wings while butterflies with folded wings.

The caterpillars observed by Aastha were green in color, *~2-3 cm length and ~0.5 cm width. They had 3 green color bands running longitudinally throughout their bodies. 2 eyes were present near the mouth part.
The caterpillars before changing to the pupal stage had red color as shared by Aastha earlier.
The caterpillars are now at the pupal stage(resting stage). Generally, male pupae are thinner than the females ones but still it is difficult to distinguish between the two sexes at the pupal stage.

Although Aastha suspected these caterpillars to of the genus Helicoverpa, after going through a reference we all were convinced that the organisms that Aastha has indeed Helicoverpa armigera; https://dergipark.org.tr/tr/download/article-file/335513 (shared by Sarita Ma’am).
The reference had brown colored larvae which uncovered the mystery that their color depends upon the food they eat hence, green color in case of Aastha’s caterpillars.
The sense organs to sense the food are located on their legs.

Lessons from the discussion:

-The caterpillars or any organism could be kept in a comparatively cleaner environment if we keep them in another clean container while cleaning and drying the first container.
-It is always good to provide fresh feed for your test subjects.
-Even caterpillars who are compared to pests are an important part of the food chain.

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