Tue, 02 Dec 2003 22:06:36 PST
Arnold ~

The larva appears to be that of the large narcissus fly, Merodon equestris.  
Despite its name, this insect will prey on tunicate bulbs of many genera.  It 
is a major pest of Narcissus but, as you've found out, it can also parasitize 
Hippeastrum.  I assume the plant was outdoors during the early Summer as this 
is when the egg was laid that later developed into the larva you found.  In 
daffodils, late in the season, the larva positions itself near the top of the 
bulb such that it can crawl out and into the soil to pupate and await the 
arrival of warmer temperatures.  This pest is endemic wherever daffodils (and other 
tunicate bulbs) are grown.  Control is by spraying the base of the leaves 
several times during the season with Dylox (approved for use on Narcissus).

Dave Karnstedt
Cascade Daffdoils
Silverton, Oregon  97381
Maritime, Mediterrean climate, USDA Zone 7-8

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