Gypsy moth update January 2015

Successful field tests with biocontrol against gypsy moth in deciduous trees

To produce a virus-based formulation against gypsy moth on deciduous trees we will

  1. Collect virus isolates for the production of the entomopathoganic virus
  2. Test the virus product for efficacy on deciduous trees in laboratory and field trials

In March 2014 at the Forest Research Institute (IBL) we collected egg masses of the gypsy moth on two different experimental places in Poland with 30 year old black alder (Alnus glutinosa) stands to estimate the occurrence of wild virus in tested population of gypsy moth. In April 2014 we have sprayed 20 trees with suspensions in two different concentrations of the entomopathogenic virus on these locations. Three to five weeks after these treatments (May 2014) we have collected alder leaves. Damage caused by the caterpillars appeared to be reduced 2-3 fold after treatments. Three weeks after the treatments (May 2014) we also collected caterpillars. These caterpillars have been reared for 2 weeks in the laboratory.

After two weeks the mortality appeared to be 3-4 fold higher among caterpillars from the treated trees than in those from the untreated trees.

Read more about our activities on gypsy moth

On the top picture: leaves of untreated trees are shown; on the bottom: leaves of treated trees.

Author

Iwona Skrzecz
Iwona Skrzecz
Gypsy moth
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