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Title Epizootics of the entomopathogenic fungus, Entomophaga grylli (Entomophthorales: Entomophthoraceae), in a grasshopper population in Northwest China.

Authors Zhang LiWei; Zhang PengFei; Zhang Long

Author Affiliation Department of Entomology, Key Lab for Biological Control, Ministry of Agriculture, China Agricultural University, o. 2, Yuanmingyuan West Road, Haidian District, Beijing 100193, China.

Author Email locust@cau.edu.cn

Journal Biocontrol Science and Technology 2018 Vol 28 No. 9 pp. 848-857

ISSN 0958-3157


Abstract

Plagues caused by locusts and grasshoppers have led to severe crop damage and great economic loss in many countries. Nevertheless, populations of these pests are often suppressed by naturally occurring predators and disease. Among such natural control factors, the entomopathogenic fungus, Entomophaga grylli, can markedly disrupt the dynamics of grasshopper populations. However, there are few reports of epizootics of this entomopathogenic fungus occurring in consecutive years. Here we report on a consecutive 2-year field survey of E. grylli epizootics in Xinjiang, Northwest China. E. grylli were observed to infect at least four species of grasshopper, Calliptamus italicus, Gomphocerus sibiricus, Chorthippus sp., and Stauroderus scalaris. This is the first record of infection of the last two species by this pathogen. The highest infection rates at the two study sites (Chonghuer and Jiadengyu, Altay Prefecture) were ≥50%, observed in mid-July 2011, and the lowest rate was >16% in early summer. The density of infected grasshoppers was positively correlated with the density of total grasshoppers collected (r=0.981). Therefore, E. grylli is an important natural factor regulating the dynamics of grasshopper populations in regions that are not subjected to artificial treatments.
Publication type
Journal article

Publisher
Taylor & Francis

Year of publication
2018

Location of publication
Abingdon

Country of publication
UK

Language of publication
English

Language of summary
English

Geographical location
Central Asia
China
North Western China
Xinjiang


Record number
20183341012

Organism descriptor
Acrididae
Calliptamus
Calliptamus italicus
Chorthippus
Chorthippus scalaris
Entomophaga (Fungi)
Entomophaga grylli
Entomophthoraceae
Entomophthorales
fungi
Gomphocerus
Gomphocerus sibiricus
insects
locusts


Descriptor
arthropod pests
biological control
damage
entomogenous fungi
entomopathogens
epidemiology
insect pests
losses
natural enemies
pathogens
pests
predators


Identifier
biocontrol
entomopathogenic fungi
Entomophaga
fungus
grasshoppers
new records
People's Republic of China
pest arthropods
pest insects
Sinkiang


Broad Term
Acrididae
Orthoptera
insects
Hexapoda
arthropods
invertebrates
animals
eukaryotes
Calliptamus
APEC countries
Developing Countries
East Asia
Asia
Entomophaga (Fungi)
Entomophthoraceae
Entomophthorales
Entomophthoromycotina
Zygomycota
fungi
Gomphocerus
China
Chorthippus
Central Asia
North Western China