FACTORS AFFECTING THE EFFICACY OF 3 COMMERCIAL FORMULATIONS OF BACILLUS-THURINGIENSIS VAR ISRAELENSIS AGAINST SPECIES OF EUROPEAN BLACK FLIES

Authors
Citation
Jb. Coupland, FACTORS AFFECTING THE EFFICACY OF 3 COMMERCIAL FORMULATIONS OF BACILLUS-THURINGIENSIS VAR ISRAELENSIS AGAINST SPECIES OF EUROPEAN BLACK FLIES, Biocontrol science and technology, 3(2), 1993, pp. 199-210
Citations number
26
Categorie Soggetti
Plant Sciences",Agriculture,"Biothechnology & Applied Migrobiology
ISSN journal
09583157
Volume
3
Issue
2
Year of publication
1993
Pages
199 - 210
Database
ISI
SICI code
0958-3157(1993)3:2<199:FATEO3>2.0.ZU;2-T
Abstract
The efficacy of three commercial formulations of Bacillus thuringiensi s var. israelensis against two European blackfly species was determine d. The effect of seston concentration, temperature and larval size on the efficacy of the formulations was also determined. Teknar-WDC was f ound to be almost four times as effective as Bactimos-WP though only s lightly more efficient than Vectobac-AS against Simulium variegatum gp . larvae. Small larvae ( < 2.5 mm) were more susceptible to both Tekna r-WDC and Vectobac-AS than large larvae ( > 5 mm) though no difference was seen with Bactimos-WP. High seston concentrations both before and during bioassays significantly decreased the efficacy of all formulat ions. Increased temperatures increased the efficacy of all formulation s.