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tacn iemaie may pump up to 600 eggs into dozens of holes. After six weeks the branches are crawling with! minute larvae. They soon fall ) to the ground and dig into! the nearest crevice to begin 17 years of solitary tunneling, hibernating, and growth.
The tiny, sawed holes! weaken the branches, which snap off or hang like flags.
Oak, hickory and fruit trees are favorite egg-laying sites for the periodical cicada, according to John Weidhaas, Virginia Tech Extension entomologist. Weidhaas said older trees receive damage comparable' to a severe pruning but generally recover. Younger trees can be severely damaged by this splitting of limbs.
Weidhaas noted that a spray application of carbaryl, also known as Sevin, can be, used to protect trees and shrubs, but timing is very important. He warned, however, that carbaryl may reduce fruit production when applied within 30 days of bloom.
“The best time to spray is a week to ten days after the male cicada starts singing. This will give the female enough time to emerge, mate and begin laying her eggs,” he said.
This egg-laying damage is the only harm to plants from the cicadas. After feeding on underground root systems for! 17 years, they emerge withj sucking—not chewing or| biting—mouth parts and eat nothing during their adult stage.
Cicadas are natives only of this part of the world, east of the Rockies, according to the National Geographic News Service.
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