Merodon equestris

Jane McGary
Mon, 19 Nov 2012 16:28:59 PST
Valuable bulbs that are susceptible to bulb fly can be protected by 
planting them in a fairly small area and covering the area with a 
floating row cover such as Reemay before the flies emerge. You can 
also plant them in a dense perennial cover such as mat-forming thyme. 
Another strategy is simply to put a scoop of grit, sand, or bark over 
the vulnerable bulb when it begins to senesce. All these prevent the 
insect from laying its eggs where the larva can easily get into the 
bulb via the hollow left by the leaves and scape.

Galanthus and Sternbergia are even more attractive to these pests 
than Narcissus, I find.

Jane McGary
Portland, Oregon, USA

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