Next year's plague

July 14, 2015  •  Leave a Comment

 

Gypsy moth females egg-layingGypsy moth females egg-laying

The Nuclear Polyhedrosis Virus that laid waste to countless Gypsy Moth caterpillars did a fine job of knocking down population levels, but, alas, the disease didn't result in a total kill. Many larvae weren't impacted and made it successfully through the pupal stage and emerged as adult moths, The brown males have been flying around in depressingly large droves as they search for white and mostly flightless females to fertilize. That job done, the males can die in peace, while the females seek suitable surfaces—often tree bark but, this year, also the tire of my Garden Way cart—for depositing tan and hairy egg clusters. It's a lengthy process that can take several days, and when each female is done, she'll die as well, secure that she's made it possible for another generation of Lymantria dispar plague bearers to sweep over the trees next spring. With any luck, it'll be wet enough to unleash a fungus that will kill most of the emerging Gypsy Moth caterpillars, but I'm not going to trust entirely to good fortune. Every egg cluster I find will be unceremoniously removed and sent to the town trash-burning incinerator.


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