Invasion and development of Verticillium lecanii in the western flower thrips, Frankliniella occidentalis

Schreiter, G.; Butt, Tariq M.; Beckett, A.; Vestergaard, Susanne; Moritz, Gerald

doi:10.1016/s0953-7562(09)80429-2

Cited by 54 publications

(27 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…grow saprophytically on the surface of insect hosts while invasion is underway (e.g. Schreiter et al, 1994;Askary et al, 1999). In this regard it is very different from other hypocrealean infections, where invasion is prompt and surface growth is post mortem (see Clarkson and Charnley, 1996).…”

Section: Article In Pressmentioning

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

View full text Add to dashboard Cite

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.

show abstract

Section: Article In Pressmentioning

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

View full text Add to dashboard Cite

show abstract

“…It has been reported that entomopathogenic fungi, such as Metarhizium anisopliae, B. bassiana and L. lecanii, infected their host insects primarily by penetrating through the integument (Goettel et al 1989, Schreiter et al 1994, St. Leger 1996, Feng 1998, Askary et al 1999. We found that L. lecanii infecting the scale insect integument involved conidial adherence to the integument surface, germination, hyphal formation and integument penetration.…”

Section: Discussionmentioning

confidence: 64%

“…Thus, successful infection is thought to depend primarily on the fungal ability to adhere to and penetrate the host integument (Charnley 1991, Schreiter et al 1994, Askary et al 1999. Penetration of the insect integument involves both mechanical pressure from the hyphae and degradation action by extracellular enzymes secreted by the fungi (Goettel et al 1989).…”

Section: Introductionmentioning

confidence: 99%

Integument of soft scale insects and the invasion of the pathogenic fungus Lecanicillium lecanii

Xie

Liu

Xue

et al. 2017

View full text Add to dashboard Cite

In order to understand how the entomopathogenic fungi infect soft scale insects (Hemiptera: Coccoidea: Coccidae), the integument of four species, namely Ceroplastes japonicus Green, Didesmococcus koreanus Borchsenius, Rhodococcus sariuoni Borchsenius and Coccus hesperidum L. were infected with the pathogenic fungus, Lecanicillium lecanii, strain NO. 3.4504. The invasion process was studied using the electron microscopy and chemical analyses methods. The results showed that the fungal conidia easily become attached on the surface of the cuticle, especially the sites with furrows and ridges. The hyphae penetrate the integument using mechanical force and also by the cuticle degradation by the extracellular enzymes. The fungal penetration results in the structural anamorphosis and disruption of chitin in the procuticle, causing damage and separation of cuticle from the epidermis with wax gland cells. The rise in fungal protease activity occurs prior to the production of chitinase and the activity values correlate with the quantities of the protein and chitin contained in the cuticle of the target scale insects.

show abstract

“…These observations coincide with the commonly described sequence of events characterizing other entomopathogenic fungal infections (Charnley, 1989). They complement detailed microscopical study of Schreiter et al (1994) and Sitch & Jackson (1997), who examined the ultrastructural aspects of the interaction between L. muscarium and its hosts. Our results, furthermore, demonstrate that germination and multiplication of L. muscarium on powdery mildew, aphids and mummified aphid occurred within 48-72 h after treatment.…”

Section: Discussionmentioning

confidence: 98%

Development of the entomopathogenic hyphomycete Lecanicillium muscarium (Hyphomycetes: Moniliales) on various hosts

Askary¹,

Yarmand²

2007

Eur. J. Entomol.

View full text Add to dashboard Cite

Abstract. The present scanning electron microscopy study describes the development of Lecanicillium muscarium, strain DAOM 198499, on the surface of diverse hosts, including Sphaerotheca fuliginea, a fungal host, and Macrosiphum euphorbiae and Aphidius nigripes, insect hosts. The hosts were sprayed with a conidial suspension of L. muscarium (10 7 conidia/ml). The specimens used in the SEM investigation were collected at particular periods after spraying and prepared for scanning using standard methods. Germination tubes developed twenty-four hours after applying L. muscarium conidia to each host. Hyphae were attached to the host by a thin mucilaginous matrix. Seventy-two hours after spraying, hyphae of S. fuliginea had collapsed and were encircled by the parasite, and primary sporulation of L. muscarium was observed. On the aphid host, colonization started with adherence of the conidia to the host cuticle, followed by conidial germination and growth of mycelium on the surface of the insect's integument. After 48 to 72 h, post colonization, the first sporulation was observed on the cuticle, particularly at articulations. The mode of parasitism of A. nigripes by this fungus was similar to that of the aphid. Development of L. muscarium was observed on both mummified aphids (containing the pupae of parasitoids) and adult parasitoids.

show abstract

Invasion and development of Verticillium lecanii in the western flower thrips, Frankliniella occidentalis

Cited by 54 publications

References 28 publications

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

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

Integument of soft scale insects and the invasion of the pathogenic fungus Lecanicillium lecanii

Development of the entomopathogenic hyphomycete Lecanicillium muscarium (Hyphomycetes: Moniliales) on various hosts

Contact Info

Product

Resources

About