Susceptibility of white grub, Brahmina coriacea (Hope) infesting potato to local strains of Beauveria brongniartii (Saccardo) in Himachal Pradesh

Abstract

Brahmina coriacea (Hope) is the most widely distributed and destructive species of white grubs having potential to inflict 40-50 per cent yield losses to potato in Himachal Pradesh. The efficacy of two local isolates of Beauveria brongniartii (KH I and KH II) was evaluated against grubs of B. coriacea by dip treatment and oral feeding methods. Against first and second instar grubs, KH I in dip treatment proved to be highly effective, whereas for third instar grubs, KH I through oral feeding showed higher virulence. The LC 50 values for first instar grubs for KH I and KH II were 2.55×10 5 conidia/ml and 2.80×10 5 conidia/ml in dip treatment, whereas in oral feeding method, the LC 50 values were 7.27×10 5 conidia/ml and 9.69×10 5 conidia/ml, respectively. Against second instar grubs, LC 50 values calculated were 2.91×10 5 conidia/ml and 3.98×10 5 conidia/ml for KH I and KH II in dip treatment, whereas corresponding values through oral feeding method were 5.36×10 5 conidia/ml and 8.82×10 5 conidia/ml. LC 50 values for third instar grubs were 4.47×10 5 conidia/ ml and 4.88×10 5 conidia/ml for KH I and KH II in dip treatment, whereas through oral feeding, LC 50 values were 3.03×10 5 conidia/ml and 5.14×10 5 conidia/ml for KH I and KH II, respectively.

Biological Impact and Enzyme Activities of Spodoptera litura (Lepidoptera: Noctuidae) in Response to Synergistic Action of Matrine and Beauveria brongniartii

“…Development of integrated control programs against S.litura involving B. brongniartii and chemical pesticides requires a clear understanding concerning the effects of chemicals on the physiology and pathogenicity of entomopathogenic fungi. Previous studies on B. brongniartii have only explained the pathogenic ability as well as lethal and sub lethal effects of this fungus against different insect pests (Fan et al, 2013;Goble et al, 2015;Mayerhofer et al, 2015;Soni et al, 2017). However, very few studies have elaborated the possible compatibility of B. brongniartii with natural chemicals (derived from plant or any other living organism) and other chemicals with novel mode of action (Sushil et al, 2018;Wu et al, 2019).…”

Matrine Enhances the Pathogenicity of Beauveria brongniartii Against Spodoptera litura (Lepidoptera: Noctuidae)

“…Previous studies on B. brongniartii have only explained the pathogenic ability as well as lethal and sub lethal effects of this fungi against different insect pests (Fan et al, 2013; Goble et al, 2015; Mayerhofer et al, 2015; Soni et al, 2017). However, very few studies have elaborated the possible compatibility of B. brongniartii with natural chemicals (derived from plant or any other living organism) and other chemicals with novel mode of action (Sushil et al, 2018) .This study reports the synergistic interaction of B. brongniartii with matrine (plant derived chemical) against S. litura under laboratory as well as semi field conditions.…”

“…Beauveria brongniartii (Sacc.) Petch is a promising fungal pathogen, which is virulent against different insect species (Wada et al, 2010, 2016; Fan et al, 2013; Liu et al, 2016; Soni et al, 2017). Liu et al (2016) determined the toxicity of B. brongniartii strain NEAU30503 against larval instars of two pest species belonging to order Lepidopetra ( Xestia c-nigrum Linnaeus and Agrotis ypsilon Rottenberg).…”

Biological Characteristics of Beauveria majiangensis Strain MJ1015 and Optimization of Solid Medium Technology for Sporulation

“…Subsequently, many studies have focused on the biological characteristics, production, and application of entomopathogenic fungi (mainly Metarhizium and Beauveria ) against white grubs ( Erler and Ates 2015 ; Kim et al 2020 ). The use of Beauveria to control grubs on peanut ( Nong et al 2011 ), sugarcane ( Visalakshi et al 2015 ; Nozipho 2016 ), maize ( Tamayo-Sánchez et al 2022 ) and potato ( Soni et al 2018 ) has achieved remarkable results. Therefore, as an environmentally friendly fungal insecticide, Beauveria has a broad application potential and significant commercial value as a biological pest control agent for white grubs.…”