scholarly journals Pathogenicity of Beauveria bassiana strains isolated from Ostrinia nubilalis Hbn. (Lepidopte­ra: Pyralidae) to original host and to ladybirds (Coleoptera: Coccinelidae)

1999 ◽  
Vol 35 (No. 3) ◽  
pp. 108-112 ◽  
Author(s):  
C. Cagáň ◽  
V. Uhlík
Keyword(s):  
Fungal Infection ◽  
Beauveria Bassiana ◽  
Ostrinia Nubilalis ◽  
Coccinella Septempunctata ◽  
Spore Suspension ◽  
Natural Conditions ◽  
Laboratory Conditions ◽  
Original Host

B. bassiana strains isolated from 0. nubilalis were tested against the larvae of 0. nubilalis and coccinellid beetles in laboratory conditions (25°C). The first dead 0. nubilalis larvae were observed 48 hours after the application. During the first five days after the application, the efficiency of spore suspension was significantly higher than the efficiency of dry spore formulation. Spore suspension killed more than 50% of larvae after 72, or 96 hours. After dry spore formulation was used, more than 50% of larvae were killed during 96, or 120 hours. B. bassiana killed 50% of coccinellid larvae during 48 hours. After anot her 24 hours 83.3% (strain SK78), or 100% (strain SK99) coccinellid larvae were killed by fungus. More than 50% of dead adults of Coccinella septempunctata L. and Propylea quattuordecimptmctata (L.) was found 72-120 hours after application of fungus. This mea ns that B. bassiana was not adapted specifically to original host and killed effectively the adults and larvae of Coccinellidae. Different behaviour probably allows the coccinellids to escape from fungal infection in natural conditions

Genetics of Gibberella fujikuroi. IV. Natural occurrence of compatibility alleles at the mating locus

1983 ◽  
Vol 25 (6) ◽  
pp. 605-608 ◽  
Author(s):  
Gurmel S. Sidhu
Keyword(s):  
Genetic Control ◽  
Gibberella Fujikuroi ◽  
Natural Occurrence ◽  
Mating Types ◽  
Natural Conditions ◽  
Field Isolates ◽  
Laboratory Conditions ◽  
Sexual Compatibility

Gibberella fujikuroi is a heterothallic bipolar fungus and both mat+ and mat− mating types are found in nature but, they rarely cross under natural conditions. However, mat+ and mat− field isolates cross with the two tester strains under laboratory conditions and show variable degrees of sexual compatibility as measured in terms of number of fertile perithecia. Fifteen mat+ and fifteen mat− field isolates were crossed with the two tester strains. Variable degrees of compatibility, ranging from 2.2 to 47.7 perithecia when crossed with 223 (mat−) and 1.1 to 39.9 perithecia when crossed with 80 (mat+), were obtained. The genetic control of six easily distinguishable degrees of compatibility were studied from testcrosses made with the tester strains using random and unordered tetrad analyses. Three alleles in mat+ and three alleles in mat− were distinguished. Frequency of natural occurrence of mat+ and mat− was found to be 27 and 73%, respectively.

Effect of Spinosad Combined with Beauveria bassiana (Hypocreales: Clavicipitaceae) on Hypothenemus hampei (Coleoptera: Curculionidae) under Laboratory Conditions

2019 ◽  
Vol 54 (1) ◽  
pp. 106-109
Author(s):  
Arcadio D. Morales ◽  
Alfredo Castillo ◽  
Juan Cisneros ◽  
Javier F. Valle ◽  
Jaime Gómez
Keyword(s):  
Beauveria Bassiana ◽  
Hypothenemus Hampei ◽  
Laboratory Conditions

scholarly journals Beauveria bassiana (Clavicipitaceae): a potent fungal agent for controlling mosquito vectors of Anopheles stephensi, Culex quinquefasciatus and Aedes aegypti (Diptera: Culicidae)

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 3838-3851 ◽  
Author(s):  
Chinnasamy Ragavendran ◽  
Nawal Kishore Dubey ◽  
Devarajan Natarajan
Keyword(s):  
Aedes Aegypti ◽  
Beauveria Bassiana ◽  
Bioactive Compounds ◽  
Culex Quinquefasciatus ◽  
Anopheles Stephensi ◽  
Mosquito Vectors ◽  
Laboratory Conditions

The efficacy of bioactive compounds identified from Beauveria bassiana extracts as effective larvicidal and pupicidal agents against Anopheles stephensi, Culex quinquefasciatus and Aedes aegypti mosquito vectors under laboratory conditions are studied.

scholarly journals Non–target effects of insecticides on the abundance of predators in Soybean

2017 ◽  
Vol 30 (3) ◽  
pp. 164
Author(s):  
A. A. Motaphale ◽  
B. B. Bhosle ◽  
B. B. Gaikwad
Keyword(s):  
Beauveria Bassiana ◽  
Untreated Control ◽  
Coccinella Septempunctata ◽  
Nomuraea Rileyi ◽  
Target Effects

Highest population of <em>Coccinella septempunctata</em> after first spray was observed in untreated control (1.92) followed by Bt (1.70), <em>Beauveria bassiana</em> (1.66) whereas during second spray more number of<em> C. septempunctata</em> observed in untreated control (2.01) followed by Azadirachtin 1500 ppm (1.77) and NSKE 5% (1.74). The population of <em>Chrysoperla arabica</em> was highest in untreated control (1.47) followed by NSKE 5% (0.99) and <em>Beauveria bassiana</em> (0.96 ) during first spray and after second spray observed in untreated control (1.30) followed by <em>Beauveria bassiana</em> (0.94) and <em>Nomuraea rileyi</em> (0.93).

scholarly journals Frazil Measured in the Laboratory and in the Field

1986 ◽  
Vol 17 (2) ◽  
pp. 115-128
Author(s):  
Gee Tsang
Keyword(s):  
Experimental Data ◽  
Fresh Water ◽  
Sea Water ◽  
Flowing Water ◽  
Natural Conditions ◽  
Water Research ◽  
Laboratory Conditions ◽  
National Water ◽  
Research Institute

Using an instrument that was recently developed at the National Water Research Institute, the concentration of frazil in flowing water was measured under laboratory conditions for both fresh water and sea water and under natural conditions in the Beauharnois Canal. Experimental data and their analysis are reported in this paper.

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