Talkback: Shieldbugs
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i was watching a documentary the other day about these beautiful native bugs but isnt there a foreign type that climatising in england and inter mating with the native and im sure the foreign one isnt to friendly to plants.
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The southern green shieldbug, Nezara viridula, arrived in Britain a few years ago and is obviously well established in the London area. It is similar to Palomena, but the nymphs are beautifully marked with red and white spots. There are some nice pictures here:
http://www.britishbugs.org.uk/heteroptera/Pentatomidae/nezara_viridula.html
which, incidentally is a very good website for looking up garden bugs.
This is a totally different bug species from Palomena so will not interbreed, and will probably not even compete. It too sucks sap from a wide variety of plants (wild and cultivated). There is a possibility that if it spreads widely it might become more of a nuisance than Palomena because it has left its predators and parasitoids behind in southern Europe so populations here increase unchecked. But like all things in the garden, it is not a pest unless it reaches pest proportions.
I only saw them for the first time a few years ago. I haven't noticed the smell however so next time I see one...