Reduction of feeding by the desert locust, Schistocerca gregaria, after infection with Metarhizium flavoviride

Moore, D.; Reed, M.; Patourel, G. le; Abraham, Y. J.; Prior, C.

doi:10.1016/0022-2011(92)90013-t

Cited by 91 publications

(43 citation statements)

References 6 publications

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“…The presented results are similar to data given by Ignoffo et al (1983) and contrary to Moore et al (1992). The first author determined that presence of B. bassiana (Boverol) on leaflets did not inhibit feeding by larvae of Leptinotarsa decemlineata (Say) in spite of high mortality (73.7-98.7%).…”

Section: Discussionsupporting

confidence: 88%

“…During this time, hosts can feed and thereby add to crop or forest damage before their death. However, fungal infection may affect feeding behaviour and food consumption resulting in decreased food intake (Moore et al 1992;Tefera and Pringle 2003). The repellent effect of Hyphomycete fungi (Noma and Strickler;, and the fungi's production of secondary metabolites (Roberts 1981;Brousseau et al 1996) can also reduce feeding.…”

Section: Introductionmentioning

confidence: 99%

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Mortality of the Nut-Leaf Weevil Strophosoma Melanogrammum (Forster) and Damage Rate of Needles After Treatment with Entomopathogenic Fungi

Augustyniuk-Kram¹

2010

Journal of Plant Protection Research

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Abstract:The susceptibility of the nut-leaf weevil, Strophosoma melanogrammum (Forster) (Coleoptera; Curculionidae) to the selected strains of Beauveria bassiana (Bals. (275) resulted in 72% mortality after 28 days with a LT 50 value of 22.1 days. Both direct and indirect spore application failed to reduce needle damage compared with the control. However, significant differences between particular isolates have appeared.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Mortality of the Nut-Leaf Weevil Strophosoma Melanogrammum (Forster) and Damage Rate of Needles After Treatment with Entomopathogenic Fungi

Augustyniuk-Kram¹

2010

Journal of Plant Protection Research

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“…In some hypocrealean infections, such as those caused by L. longisporum, reduction of feeding is dose-dependent (see e.g. Moore et al, 1992). This might be expected if the phenomenon is linked in some way to host defence.…”

Section: Discussionmentioning

confidence: 99%

“…Reduced feeding and reproduction are common features of insect mycoses (e.g., Blanford and Thomas, 2001;Moore et al, 1992). Not all pathogen-induced ''behaviours'' are detrimental to the host.…”

Section: Introductionmentioning

confidence: 99%

Effects of Lecanicillium longisporum infection on the behaviour of the green peach aphid Myzus persicae

Roditakis

Couzin

Franks³

et al. 2008

Journal of Insect Physiology

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The effects of the entomopathogenic fungus Lecanicillium longisporum (Zimmerman) Zare & Gams on three parameters of behaviour (feeding, reproduction and movement) of the green peach aphid Myzus persicae (Homoptera: Aphididae) were investigated in the laboratory. Visual analysis of video tapes established that honeydew excretion events of mycosed aphids gradually declined from 2 d post inoculation and reproduction rate was significantly reduced 2 d prior to death (which occurred on day 6); both parameters were stable in controls over the same period. A detailed comparison was made between mobility of aphids during infection with two isolates of L. longisporum, using image analysis of video recordings. Both isolates caused an increase in activity at the beginning of mycosis (during fungal germination and cuticle invasion) though the intensity and the duration of this behaviour varied with the isolate. The possibility that increased movement in early mycosis helps disseminate disease is discussed in the light of the observation that saprophytic surface growth occurs on living M. persicae as it does in at least some other Lecanicillium spp-insect interactions.

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“…acridum (isolate IMI 330189) with a micro applicator. This method of application is noninvasive (the suspension is placed on the insect's cuticle beneath the dorsal pronotal shield), and studies have shown that the blank oil formulation has negligible effects on mortality and behavior in the laboratory or field (21)(22)(23)(24). Spore concentration in the suspension was adjusted to give 1 ϫ 10 4 spores per insect, and an equivalent number of solitaria and gregaria locusts were left untreated as controls.…”

Section: Methodsmentioning

confidence: 99%

Coping with crowds: Density-dependent disease resistance in desert locusts

Wilson

Thomas

Blanford

et al. 2002

Proc. Natl. Acad. Sci. U.S.A.

281

235

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Parasite transmission generally exhibits some form of positive density dependence. Thus, as population density increases, so too does the per capita risk of becoming infected. Under such circumstances, natural selection should favor individuals that use cues associated with population density to determine the optimal allocation of resources to disease resistance mechanisms. As a consequence, individuals experiencing crowded conditions are predicted to be more resistant to parasites and pathogens than those experiencing low-density conditions. This phenomenon (termed ''density-dependent prophylaxis'') [Wilson, K. & Reeson, A. F. (1998) Ecol. Entomol. 23, 100 -101] is predicted to be particularly prevalent in outbreak pest species and in species exhibiting density-dependent phase polyphenism, such as the desert locust, Schistocerca gregaria. Here we show that, as predicted, desert locusts reared under crowded conditions are significantly more resistant than solitary locusts to the entomopathogenic fungus, Metarhizium anisopliae var. acridum, a key natural disease of acridids and an important agent in locust and grasshopper biocontrol. Moreover, enhanced pathogen resistance in crowded locusts is associated with elevated antimicrobial activity, but not with any difference in thermal preferences or behavioral fever response. These results have implications for understanding the development and biocontrol of locust plagues.

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Reduction of feeding by the desert locust, Schistocerca gregaria, after infection with Metarhizium flavoviride

Cited by 91 publications

References 6 publications

Mortality of the Nut-Leaf Weevil Strophosoma Melanogrammum (Forster) and Damage Rate of Needles After Treatment with Entomopathogenic Fungi

Mortality of the Nut-Leaf Weevil Strophosoma Melanogrammum (Forster) and Damage Rate of Needles After Treatment with Entomopathogenic Fungi

Effects of Lecanicillium longisporum infection on the behaviour of the green peach aphid Myzus persicae

Coping with crowds: Density-dependent disease resistance in desert locusts

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