Monday, December 06, 2010
How Oleander aphids and syrphids spent their November
There are many sizes of aphids in this established colony ranging from tiny to adult, along with some white cast off sheds.
About two weeks later I noticed some syrphid larvae mowing their way through the crowd of juicy aphids. This one has managed to clear a significant space around itself, apparently able to tolerate the taste of these toxi-fied tidbits. There is some documentation that ladybird and lacewing larvae suffer development problems during pupation after feeding on aphis nerii; not sure about syrphids but I'll watch and see if this one emerges whole.
The first of December the syrphid larva on the stem has pupated, the crowd of aphids still keeping its distance. A few days later, though, some aphids have begun to encroach on the pupating and now non-threatening syrphid.