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Gall on Psittacorum heliconia
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| [Note Guidelines] Photographer's Note [French] |
The subject
Wales developed by Psittacorum heliconia . Galls are tumors developed by plants in response to parasitic exogenous attack from an insect, a fungus or another. The most common are due to insect gall or knot. It was enumerated approximately 13 000 species gall.
Frequently, the insect responsible makes an injection to lay an egg in the plant (here, in the ovaries of the flower). The females are involved in it: this is called oviposition. Larva develops in the plant. Sometimes, other insects may in turn come to parasitize the intruder, who become prey to parasitic. This is known as hyper parasitism.
You can see to the top left, the presence of an insect, which some of them have, perhaps, been the source of thoses tumors by laying eggs in the plant several weeks in advance .
The universe is vast and gall tumors can be spectacular, as is the case in the photograph presented here and the many examples of this site Aramel : the universe of insects.
The shooting
Photograph taken soon in the morning, by a sunny day, close to a small river in the bush. In order ta get enough depth of field, the aperture is f/8. The focal length is 23 millimetres. With those parameters, the shooting time is 1/125. |
nikosrio has marked this note useful
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great capture, amazing colors with sharp details,
Regards,
Vijeesh
Hello Philippe,
very interesting plant, great colors and light, sharp details,
thanks for sharing, have a nice day,
Nikos.
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