PeterD-2009

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  1. Plants and Flowers

Galls

Galls are formed by the host plant as a reaction to chemicals being injected by gall wasps. The gall forms protection to the larvae of the wasps until they emerge in the spring as young adult wasps. Each Gall wasp specialises in a particular plant which aids identification of the wasp larvae by identifying the plant on which the Gall is formed. It is fascinating to see this interaction between insects and plants. It is easy to appreciate the advantage given to the wasp by this relationship but I cannot think of any advantage for the plant.
Read More
Leaf Gall. Copyright 2009 Peter Drury<br />
Denmead Woods. Several galls were present but this one was chosed as it shows the gall sandwiching the leaf.
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Leaf Gall. Copyright 2009 Peter Drury
Denmead Woods. Several galls were present but this one was chosed as it shows the gall sandwiching the leaf.

nature

  • 01 May 2015 Green Woodpecker
  • 27 Aug 2010 - Knopper Gall caused by the Gall Wasp - Andricus quercuscalicis. Copyright Peter Drury 2010
  • Close-up of leaf gall. Copyright Peter Drury 2010<br />
The two insects in this image are Barkfly (Psocopterans) larvae (Trichopsocus sp).<br />
To give these items scale, the gall is only about 2mm diameter.
  • Galls on a leaf. Copyright Peter Drury 2010
  • Robins Pin-cushion. Copyright 2009 Peter Drury<br />
Two pin-cushions in the eary stage of formation.<br />
This Gall is caused by the Diplolepis rosae Gall wasp injecting chemicals in the leaf bud of a rose. The resulting structure provides protection for the wasp larvae from predators and also climate. The young wasps emerge in the spring.
  • Robins Pin-cushion. Copyright 2009 Peter Drury<br />
This Gall is caused by the Diplolepis rosae Gall wasp injecting chemicals in the leaf bud of a rose. The resulting structure provides protection for the wasp larvae from predators and also climate. The young wasps emerge in the spring.
  • Leaf Gall. Copyright 2009 Peter Drury<br />
Denmead Woods. Several galls were present but this one was chosed as it shows the gall sandwiching the leaf.
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