scholarly journals Microbial Control of the Diamondback Moth, Plutella xylostella, by an Entomopathogenic Fungus, Beauveria bassiana. II. Effects of Temperature on Mycoses and Conidial Invasion Time.

2000 ◽  
Vol 44 (3) ◽  
pp. 177-182 ◽  
Author(s):  
Toshio Masuda
Keyword(s):  
Beauveria Bassiana ◽  
Plutella Xylostella ◽  
Entomopathogenic Fungus ◽  
Diamondback Moth ◽  
Microbial Control ◽  
Effects Of Temperature ◽  
Fungus Beauveria Bassiana

scholarly journals Compatibility between the entomopathogenic fungus Beauveria bassiana and insecticides used in coffee plantations

2003 ◽  
Vol 60 (4) ◽  
pp. 663-667 ◽  
Author(s):  
Carolina Natali de Oliveira ◽  
Pedro Manuel Oliveira Janeiro Neves ◽  
Lídio Sueki Kawazoe
Keyword(s):  
Beauveria Bassiana ◽  
Vegetative Growth ◽  
Entomopathogenic Fungus ◽  
Microbial Control ◽  
Infection Process ◽  
Conservation Strategy ◽  
Coffee Plantations ◽  
Conidia Germination ◽  
Fungus Beauveria Bassiana

Microbial control in integrated pest management (IPM) programs of coffee plantations is an important factor for the reduction of pest population densities. The use of selective pesticides can be associated with entomopathogens, increasing the efficiency of the control and reducing the use of required insecticides. The in vitro fungitoxic effect of insecticide formulations of Thiamethoxam, Cyfluthrin, Deltamethrin, Alpha-Cypermethrin, Triazophos, Chlorpyrifos, Fenpropathrin and Endosulfan and Beauveria bassiana (CG 425 strain) was evaluated at three concentrations (FR = average field recommendation; 0.5 ´ FR and 2 ´ FR). Effects of these products on conidia germination, vegetative growth and sporulation were compared. Only five insecticides, at the FR concentration, promoted conidia viability higher than 60%. Viability should be considered the most important factor to be evaluated since it is the first step of the infection process. The insecticide formulations of Alpha-Cypermethrin, Thiamethoxam and Cyfluthrin caused the lower inhibition level on conidia germination at the two lower concentrations, with no difference in relation to the control. With respect to vegetative growth analysis, Thiamethoxam at the two lower concentrations was not found to cause radial growth inhibition. Thiamethoxam caused the smallest inhibition level with regard to conidia production. The use of Alpha-Cypermethrin and Thiamethoxam formulations in coffee IPM programs for a B. bassiana inoculum conservation strategy are recommended, since these products were compatible with the entomopathogenic fungus Beauveria bassiana (CG 425), an important natural control agent of the coffee berry borer, Hypothenemus hampei.

Selection and Characterization of Entomopathogenic Fungus, Beauveria bassiana for the Microbial Control of Spodoptera litura

2018 ◽  
Vol 22 (4) ◽  
pp. 269-275
Author(s):  
Ji Hee Han ◽  
Hye Ju Jeong ◽  
Jae Yoon Kim ◽  
Moran Lee ◽  
Dayeon Kim ◽  
...  
Keyword(s):  
Beauveria Bassiana ◽  
Entomopathogenic Fungus ◽  
Spodoptera Litura ◽  
Microbial Control ◽  
Fungus Beauveria Bassiana

scholarly journals On the virulence of the entomopathogenic fungi, Beauveria bassiana and Metarhizium anisopliae (Ascomycota: Hypocreales), against the diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae)

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Muhammad Shehzad ◽  
Muhammad Tariq ◽  
Tariq Mukhtar ◽  
Asim Gulzar
Keyword(s):  
Sex Ratio ◽  
Beauveria Bassiana ◽  
Entomopathogenic Fungi ◽  
Plutella Xylostella ◽  
Metarhizium Anisopliae ◽  
Insect Pest ◽  
Diamondback Moth ◽  
Economic Damage ◽  
Offspring Sex Ratio ◽  
Development Of Resistance

Abstract Background The diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), is a noxious pest of cruciferous crops all over the world causing serious economic damage. Management of insect pest generally depends on chemical control; however, due to development of resistance against all types of insecticides, alternative approaches especially utilization of a microbial agent is inevitable. Results Potential of 2 entomopathogenic fungi (EPF), viz., Beauveria bassiana and Metarhizium anisopliae, was evaluated against 2nd and 3rd larval instars of P. xylostella by adopting leaf dip and direct spraying methods under laboratory conditions. Significant mortality rate was achieved by each fungus under adopted methodologies. However, B. bassiana was found to be more effective in both conditions than M. anisopliae. Highest mean corrected mortality (77.80%) was recorded, when spores of B. bassiana were sprayed on the 2nd instar larvae (LC50=1.78×104/ml) after the 6th day of treatment. Similarly, incase of M. anisopliae LC50 for the 2nd instar at the same methodology was 2.78×104/ml with a mortality percentage of 70.0%. Offspring sex ratio was non-significantly related to treatment concentration and methodology, except for the control. Conclusion Beauveria bassiana and M. anisopliae had potential to suppress P. xylostella infestations when applied appropriately. Present findings suggested that B. bassiana and M. anisopliae when sprayed on immatures of host insect had more effect as compared to leaf dip procedure. Furthermore, no significant effect of concentrations was observed on sex ratio.

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