Beneficial wasps drawn to greening-infected trees, psyllids

06/02/2014 08:18:00 AM
Vicky Boyd

Asian citrus psyllidCourtesy Florida Department of Agriculture and Consumer ServicesTrees infected with citrus greening emit a scent that attracts Asian citrus psyllids.Greening-infected citrus trees emit an odor that not only attracts Asian citrus psyllid, which spreads the disease, but also a minute wasp that feeds on the psyllid.

Research led by Lukasz Stelinski, associate professor of entomology and nematology at the University of Florida's Citrus Research and Education Center in Lake Alfred, examined the interactions among the species.

When trees are infected with citrus greening, they emit an odor—methyl salicylate—that makes them more attractive to Asian citrus psyllids, according to a news release.

Although the infected trees are less nutritious to psyllid, the mechanism may encourage the insect to spread the disease.

Stelinski's group injected a minute wasp, which is a natural psyllid enemy, into the study.

When they put the wasp in an olfactometer that can deliver different scents, they found the wasp was drawn toward the methyl salicylate as well as limonene, which is emitted by citrus plants.

They also found the wasps were more apt to attack psyllids on greening-infected plants and on methyl salicylate-treated plants than on healthy ones.

Their work was published recently online in the journal "Frontiers in Ecology and Evolution.

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Atlanta  |  June, 04, 2014 at 08:06 AM

After looking at data for two years, I think it is all the reflected EMF(electromagnetic radiation) reflecting off our atmosphere fromoverlapping cellular towers, RF & microwaves, including Doppler radar, causing the odor and wasting of the trees, The low pH acidic trees are acting like an antenna and are conducting the EM radiation through the trees and roots and into the ground, gradually damaging the trees and attracting parasites and disease. The pattern of citrus disease in Florida correlates highly with cell tower, Radio/TV & doppler microwave tower locations. The first thing that happens when you "cook" a tree is that it gives off volatiles, which will then attract the bugs. Research @ darkmattersalot

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