Please use this identifier to cite or link to this item:
|Title:||Studies on the use of fungal plant pathogens for control of Hydrilla verticillata (L.f.) Royle|
|Authors:||Aquatic Plant Control Research Program (U.S.)|
Joye, Gary F.
Cofrancesco, Alfred F.
|Publisher:||Environmental Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
Abstract: A survey was conducted in populations of Hydrilla verticillata (L.f.) Royle growing in lakes and rivers of the southeastern United States for the purpose of identifying plant pathogens with potential biocontrol use. An isolate of the fungus identified as Macrophomina phaseolina (Tassi) Goid. was collected from the foliage of hydrilla growing in Lake Houston, Texas. In repeated laboratory, greenhouse, and field tests, this fungus was pathogenic to hydrilla. Inoculum concentrations of between 1 x 10^4 and 1 x 10^6 colony forming units per milliliter were sufficient to kill hydrilla test plants over a 3- to 4-week period. In a field of 46 spec1es and subspecific taxa within 22 families, this fungus was pathogenic only to hydrilla and duck lettuce (Ottelia alismoides (L.) Pers.). This fungus may be useful as a biocontrol agent of hydrilla.
|Appears in Collections:||Technical Report|