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Title: Evaluation of the infectivity of a Cercospora rodmanii formulation using two application systems
Authors: Theriot, Edwin A.
Theriot, Russell F.
Sanders, Dana R., Sr.
Keywords: Aquatic plant control
Biological control
Pathogenic fungi
Fungal pathogens
Cercospora rodmanii
Aquatic Plant Control Research Program (U.S.)
Publisher: U.S. Army Engineer Waterways Experiment Station
Series/Report no.: Miscellaneous Paper (Aquatic Plant Control Research Program (U.S.)) ; no.Miscellaneous Paper A-81-2
Abstract: As a part of a Large-Scale Operations Management Test (LSOMT) of insects and pathogens for the control of waterhyacinth (Eichhornia crassipes Mort.) in Louisiana, a formulation of Cercospora rodmanii was evaluated to determine the ability of C. rodmanii to infect field populations of waterhyacinth, and to evaluate two equipment systems for suitability in application of the formulation. The formulation was applied with a high-pressure piston pump system at 150 psi and a low-pressure impeller pump at 20 to 25 psi. In the fall study, a C. rodmanii formulation was applied to test plots in a roadside canal in Louisiana at a rate of 5 g (5 x 10⁴ Colony Forming Units) per square metre. Cercospora rodmanii in the formulation proved to be infectious on the test plants; based upon observed infectivity in field plots 7 weeks after application of the formulation, it was concluded that there was no significant difference in infectivity when using a high-pressure piston pump system at 150 psi or a low-pressure impeller pump system at 25 psi.
Description: Miscellaneous Paper
Gov't Doc #: Miscellaneous Paper A-81-2
Rights: Approved for public release; distribution is unlimited
Appears in Collections:Miscellaneous Paper

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