A PILOT BLACK FLY (DIPTERA: SIMULIIDAE) CONTROL PROGRAM USING BACILLUS THURINGIENSIS VAR. ISRAELENSIS IN NEWFOUNDLAND

Abstract A pilot black fly control program using Bacillus thuringiensis var. israelensis on a small stream system near St. John's, Newfoundland resulted in a 70% or greater population reduction of adult black flies from the previous year. The species present in the system were Prosimulium mixtu...

Full description

Bibliographic Details
Published in:The Canadian Entomologist
Main Authors: Colbo, M. H., O'Brien, H.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1984
Subjects:
Insect Science
Molecular Biology
Physiology
Ecology, Evolution, Behavior and Systematics
Structural Biology
Newfoundland
Online Access:http://dx.doi.org/10.4039/ent1161085-8
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0008347X00029916
Description
Summary:Abstract A pilot black fly control program using Bacillus thuringiensis var. israelensis on a small stream system near St. John's, Newfoundland resulted in a 70% or greater population reduction of adult black flies from the previous year. The species present in the system were Prosimulium mixtum , Stegopterna mutata , Eusimulium vernum , Simulium tuberosum , S. venustum / verecundum complex, and S. vittatum . The formulation used was Teknar ® flowable concentrate (Sandoz Inc.) rated at 600 ITU/mg which proved effective against the larval stages of all black fly species at a dose of 10 ppm for 1 min. The results indicated that this agent will be effective if applied at the appropriate locations and times. The 1-min dose was practical except in very cold water (0°–7 °C) where a 5-min or longer dose may be required. The unpredictable relief pattern of the northern streams resulted in a highly variable downstream carry for the B.t.i . Therefore application sites must be determined by a stream survey and not just from discharge characteristics.

Similar Items