RESPONSE OF PERENNIAL HERBACEOUS ORNAMENTALS TO MELOIDOGYNE-HAPLA

Sixty-nine herbaceous perennial ornamentals in 56 genera were evaluate d for root galling after 2 months in soil infested with Meloidogyne ha pla under greenhouse conditions. Plants were rated susceptible or resi stant based on the number of galls present on the root system. Thirty- six percent had more than 100 galls on the roots (similar to 'Rutgers' tomato controls) and were rated susceptible. Thirty percent of the pl ants tested did not have galls or egg masses present on the root syste m and were rated resistant. The remaining 34 percent were intermediate in response. Variation in response to M. hapla was observed within pl ant genera and species. The identification of M. hapla-resistant peren nial ornamentals will aid in management of this nematode in landscapes and production fields.