Different effects of the insectpathogenic fungus Beauveria bassiana (Deuteromycota) on the bark beetle Ips sexdentatus (Coleoptera: Curculionidae) and on its predator Thanasimus formicarius (Coleoptera: Cleridae)

2010 ◽  
Vol 117 (1) ◽  
pp. 33-38 ◽  
Author(s):  
B. M. Steinwender ◽  
H. W. Krenn ◽  
R. Wegensteiner
Keyword(s):  
Beauveria Bassiana ◽  
Bark Beetle ◽  
Thanasimus Formicarius ◽  
Ips Sexdentatus ◽  
Fungus Beauveria Bassiana

scholarly journals An attempt to use the fungus Beauveria bassiana (Bals.) Vuill. in forest protection against the bark beetle Ips typographus (L.) in the field

2015 ◽  
Vol 76 (1) ◽  
pp. 5-17 ◽  
Author(s):  
Wojciech Grodzki ◽  
Mieczysław Kosibowicz
Keyword(s):  
Beauveria Bassiana ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Tree Mortality ◽  
Ips Typographus ◽  
Forest Environment ◽  
Forest Protection ◽  
Spruce Stands ◽  
Insect Populations ◽  
Fungus Beauveria Bassiana

Abstract In 2011-2013, trials on the use of the entomopathogenic fungus Beauveria bassiana against bark beetle (Ips typographus) populations were carried out under open field conditions in Norway spruce stands suffering from an outbreak in the Beskid Żywiecki Mts. in Poland. Modified pheromone traps were deployed to capture and thereafter release fungus-infected bark beetles to the forest environment. Infested spruce trees felled next to the traps remained unaffected by the transmission of the fungus to insect populations. Direct spraying or dusting of lying trap logs and suspended caged rearing bolts did not have any effect on spruce infestation by I. typographus, its reproduction success and development or natural enemies inside the bark. A very small effect on mortality rates of target as well as non-target insects overwintering in the dusted litter was observed. Treated stands, unlike control stands, were indirectly affected by the treatment, evidenced by the reduction of tree mortality due to bark beetle infestation. At present, no recommendations concerning the potential use of the fungus in forest protection can be given. However such an environmentally friendly approach represents a promising future prospect.

THE FUNGUS BEAUVERIA BASSIANA (DEUTEROMYCOTINA: HYPHOMYCETACEAE) IN THE WESTERN BALSAM BARK BEETLE, DRYOCOETES CONFUSUS (COLEOPTERA: SCOLYTIDAE)

1984 ◽  
Vol 116 (10) ◽  
pp. 1419-1424 ◽  
Author(s):  
H. S. Whitney ◽  
D. C. Ritchie ◽  
J. H. Borden ◽  
A. J. Stock
Keyword(s):  
British Columbia ◽  
Beauveria Bassiana ◽  
Bark Beetle ◽  
Natural Occurrence ◽  
Abies Lasiocarpa ◽  
Direct Observations ◽  
Dryocoetes Confusus ◽  
Fungus Beauveria Bassiana ◽  
Healthy Males

AbstractThe natural occurrence of beauveriosis in Dryocoetes confusus (Swaine) in Abies lasiocarpa (Hook.) Nutt. in British Columbia is reported, and the pathogenicity of Beauveria bassiana (Bals.) Vuill. isolated from D. confusus was confirmed experimentally. Also, direct observations of newly established pairs of D. confusus in glass – phloem sandwich cultures showed that cadavers of B. bassiana-killed females were walled-off with frass by healthy males.

scholarly journals Ips sexdentatus Mass-Trapping: Mitigation of Its Negative Effects on Saproxylic Beetles Larger Than the Target

Forests ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 175
Author(s):  
Matteo Bracalini ◽  
Francesco Croci ◽  
Emanuele Ciardi ◽  
Giulio Mannucci ◽  
Emanuele Papucci ◽  
...  
Keyword(s):  
Bark Beetle ◽  
Natural Enemies ◽  
Bark Beetles ◽  
Mass Trapping ◽  
Beetle Species ◽  
Negative Effects ◽  
Thanasimus Formicarius ◽  
Mesh Screen ◽  
Ips Sexdentatus ◽  
Average Size

Research Highlights: We investigated the negative effects of bark beetle mass trapping, especially non-target catches among the target’s natural enemies. Slot traps modified with mesh screen and escape windows were tested to improve their selectiveness. Background and Objectives: Two of the main natural enemies of bark beetles, Thanasimus formicarius (L.) and Temnoscheila caerulea (Olivier), are frequently trapped in high numbers in Ips sexdentatus (Böerner) pheromone traps, along with other saproxylic insects; this may lead to much larger pest populations in the successive 4–20 beetle generations. From 2016–2019, during I. sexdentatus mass-trapping in a pine forest of Tuscany (Italy), non-target catches were tallied. Trap modifications were evaluated to mitigate non-target catches, especially those concerning bark beetles’ natural enemies. Materials and Methods: A total of 25 bark-beetle slot traps were placed about 75 m apart in a pine stand infested by I. sexdentatus. Traps were baited with I. sexdentatus aggregation pheromone, whose main components are ipsenol, ipsdienol, and 2-methyl-3-buten-2-ol. Catches were collected every 10 days from March to December. In 2019, 13 traps were modified by applying a 6-mm mesh screen on top of the collection container and by providing three 60 mm × 8 mm escape windows immediately above the screen. These “modified traps” and their captures were considered separately from the 12 remaining “standard traps.” All bark beetle species were recorded, as well as all beetle species > 8 mm. Results: Overall, target catches amounted for <10% of the total beetle catches. The most-collected species was the bark beetle Orthotomicus erosus Wollaston. Trap modification allowed the escape of larger species, resulting in the reduction of the average size of caught specimens. Even though non-target catches among predators were still high, the proportion of major predators (T. formicarius and T. caerulea) to bark beetles showed a statistically significant reduction of predator catches in modified traps, an encouraging outcome. Conclusions: Trap modifications may mitigate the problem of non-target catches during mass trapping, especially reducing catches of beetle species larger than the target. However, the key is to schedule mass trapping only during those seasons when the target adults are more active than the main predator adults, thus limiting their catches and, consequently, the negative effects on pest management and biodiversity.

ChemInform Abstract: Selectivity of the Biooxygenation of N-Phenylcarbamates by the Fungus Beauveria bassiana.

ChemInform ◽  
2010 ◽  
Vol 29 (15) ◽  
pp. no-no
Author(s):  
S. PIETZ ◽  
D. WOELKER ◽  
G. HAUFE
Keyword(s):  
Beauveria Bassiana ◽  
Fungus Beauveria Bassiana

Selection of entomopathogenic fungus Beauveria bassiana (Deuteromycotina: Hyphomycetes) for the biocontrol of Dendroctonus ponderosae (Coleoptera: Curculionidae, Scolytinae) in Western Canada

2021 ◽  
Vol 105 (6) ◽  
pp. 2541-2557
Author(s):  
Albert Remus R. Rosana ◽  
Stanley Pokorny ◽  
Jennifer G. Klutsch ◽  
Cherry Ibarra-Romero ◽  
Randy Sanichar ◽  
...  
Keyword(s):  
Beauveria Bassiana ◽  
Entomopathogenic Fungus ◽  
Dendroctonus Ponderosae ◽  
Western Canada ◽  
Fungus Beauveria Bassiana ◽  
Selection Of

scholarly journals Management of the Egyptian alfalfa weevil, Hypera brunneipennis (Boheman) (Coleoptera: Curculionidae), in the alfalfa, Medicago sativa L., using the entomopathogenic fungus, Beauveria bassiana (Balsamo) Vuillemin

2019 ◽  
Vol 29 (1) ◽  
Author(s):  
Monir M. M. El Husseini
Keyword(s):  
Medicago Sativa ◽  
Beauveria Bassiana ◽  
Entomopathogenic Fungus ◽  
Larval Population ◽  
Alfalfa Weevil ◽  
Alfalfa Field ◽  
Medicago Sativa L ◽  
Hypera Brunneipennis ◽  
Fungus Beauveria Bassiana ◽  
Sweep Net

AbstractLarval and adult populations of the Egyptian alfalfa weevil (EAW) Hypera brunneipennis (Boheman) (Coleoptera: Curculionidae) was monitored after application of the entomopathogenic fungus Beauveria bassiana in the alfalfa field (Medicago sativa L.) in two successive seasons 2014/2015 and 2015/2016. The second and last generation of the weevil on April 10, 2016, was controlled by only one application with the conidiospores of the entomopathogenic fungus B. bassiana (3 × 108 spores/ml). Accordingly, the larval population decreased from 16.07 ± 1.09 in season 2015/2016 to 7.37 ± 0.05 individuals/50 sweep net double strokes in season 2016/2017. Also, the adult weevil’s population decreased from 5.66 ± 0.8 to 2.55 ± 0.6 individuals/50 sweep net double strokes in the two seasons, respectively. 39.66% mortality rate was recorded in the Hypera brunneipennis adults aestivated under loose bark of the surrounding eucalyptus trees, which received the application of B. bassiana in the field. Another application with the fungus, targeting the second generation of the pest adults in alfalfa each season, will undoubtedly lead to a further decrease in the pest population.

scholarly journals Gene diversity explains variation in biological features of insect killing fungus, Beauveria bassiana

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Laila Gasmi ◽  
Sehyeon Baek ◽  
Jong Cheol Kim ◽  
Sihyeon Kim ◽  
Mi Rong Lee ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Beauveria Bassiana ◽  
Gene Diversity ◽  
Dna Photolyase ◽  
Cyclophilin B ◽  
Biological Features ◽  
Number Variation ◽  
Potential Impact ◽  
Chitinase Genes ◽  
Fungus Beauveria Bassiana

AbstractBeauveria bassiana is a species complex whose isolates show considerable natural genetic variability. However, little is known about how this genetic diversity affects the fungus performance. Herein, we characterized the diversity of genes involved in various mechanisms of the infective cycle of 42 isolates that have different growth rates, thermotolerance and virulence. The analysed genes showed general genetic diversity measured as non-synonymous changes (NSC) and copy number variation (CNV), with most of them being subjected to positive episodic diversifying selection. Correlation analyses between NSC or CNV and the isolate virulence, thermotolerance and growth rate revealed that various genes shaped the biological features of the fungus. Lectin-like, mucin signalling, Biotrophy associated and chitinase genes NSCs correlated with the three biological features of B. bassiana. In addition, other genes (i.e. DNA photolyase and cyclophilin B) that had relatively conserved sequences, had variable CNs across the isolates which were correlated with the variability of either virulence or thermotolerance of B. bassiana isolates. The data obtained is important for a better understanding of population structure, ecological and potential impact when isolates are used as mycoinsecticides and can justify industrialization of new isolates.

Sensitivity of the entomopathogenic fungus Beauveria bassiana (Bals.-Criv.) Vuill. to selected herbicides

2012 ◽  
Vol 69 (6) ◽  
pp. 717-721 ◽  
Author(s):  
Katarina Kos ◽  
Franci A Celar
Keyword(s):  
Beauveria Bassiana ◽  
Entomopathogenic Fungus ◽  
Fungus Beauveria Bassiana
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