Wednesday, 15 February 2017

Common vegetable moths

Life cycle images of few of the common moths seen on vegetables.


Moths described in this page are


Plutella xylostella, commonly known as Cabbage moth or Diamondback moth.
Helicoverpa armigera,
commonly known as cotton bollworm or corn earworm.
Maruca vitrata, commonly known as Maruca pod borer or Bean pod borer.

Plutella xylostella

Cabbage moth or Diamondback moth

 
 
These are seen commonly on cabbage




The caterpillar is only a few mm long


The colour turns a little darker when in later stage


The large caterpillars are green in colour.


During pupation it makes a shelter out of silk and stays inside






 The eyes turn dark in a few days




In four days the pupae turns totally black




Empty shell after the adult emerged.

Observation made in Jan - Feb MMXVII



 

Helicoverpa armigera 

Cotton bollworm or Corn earworm moth


These are commonly seen on Green peas and also on other known host plants including chickpea, tomato, field beans etc. 



The caterpillar is dark green when grown.


 Like Daphnis nerii these are also known to coil up when disturbed.


The colour slowly turns rufous before pupation.


The pupae with the skin from its last instar. The colour is initially bright green.


 The colour soon turns to brownish red.



Comparison of two pupae. The one on the left is from an earlier stage and the right is soon to eclose.


An adult female.


An adult male.

Observation made in Jan - Feb MMXVII




Maruca vitrata

Maruca pod borer or Bean pod borer


These moths are seen on field beans, legumes, pigeonpea etc...


 The caterpillars are seen with black spots on their body like in Parotis marginata


 


The pupae is bright green in the beginning.


It slowly turns reddish in colour


 The eyes turn dark first when its about to pupate.


The adult shown here is deformed and couldn't fly.


Observation made in Jan MMXVII





The author thanks the members of various moth / insect groups on facebook who helped in identifying species.

This record will be updated as and when possible.

All photographs are taken by the author unless mentioned otherwise.
To use the above copyrighted content, do drop a mail or comment.






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