Translator Disclaimer
1 August 2002 Pathogenicity of Beauveria bassiana, Metarhizium anisopliae (Deuteromycotina: Hyphomycetes), and other Entomopathogenic Fungi Against Lygus lineolaris (Hemiptera: Miridae)
Author Affiliations +
Abstract

The pathogenicity of 32 fungal isolates from the genera of Beauveria, Verticillium, Paecilomyces, Metarhizium, Mariannaea, and Hirsutella to second-instar tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), was tested under laboratory conditions. These isolates originated from various insect hosts and substrates from France, Denmark, Austria, Italy, Turkey, Syria, and the United States. A single exposure concentration (1 × 107 conidia/ml) assay for each isolate was first conducted by immersing the insects in 10 ml of a fungal suspension for 5 s. These were followed by concentration-mortality assays on five of the most pathogenic isolates using four test concentrations ranging from 2 × 104 to 2 × 107 conidia/ml. B. bassiana 726 (Bemisia-passaged GHA strain) was used as a standard for comparison in all of the assays. Among the test isolates, three produced mortality not significantly different from the water control. Mortality ranged from 35 to 98% among the other 29 isolates. The LC50 values of the five most pathogenic isolates ranged from 0.8 to 5.0 × 105 conidia/ml. The LT50 values for these isolates ranged from 6.0 to 6.9, 3.1 to 5.1, and 2.5 to 4.0 d for concentrations of 2 × 105, 2 × 106, and 2 × 107 conidia/ml, respectively. Two strains of B. bassiana (ARSEF 1394, 5665) and one M. anisopliae (ARSEF 3540) were more pathogenic to the nymphs than the standard, having significantly lower LC50 and LT50 values. Our results demonstrated that several genera of entomopathogenic fungi have promise as microbial control agents against L. lineolaris.

Houping Liu, Margaret Skinner, Bruce L. Parker, and Michael Brownbridge "Pathogenicity of Beauveria bassiana, Metarhizium anisopliae (Deuteromycotina: Hyphomycetes), and other Entomopathogenic Fungi Against Lygus lineolaris (Hemiptera: Miridae)," Journal of Economic Entomology 95(4), 675-681, (1 August 2002). https://doi.org/10.1603/0022-0493-95.4.675
Received: 28 September 2001; Accepted: 1 February 2002; Published: 1 August 2002
JOURNAL ARTICLE
7 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top