scholarly journals Winter prevalence of obligate aphid pathogen Pandora neoaphidis mycosis in the host Myzus persicae populations in southern China: modeling description and biocontrol implication

2012 ◽  
Vol 43 (1) ◽  
pp. 325-331 ◽  
Author(s):  
Xiang Zhou
Keyword(s):  
Myzus Persicae ◽  
Southern China ◽  
Pandora Neoaphidis ◽  
Aphid Pathogen

Incidence of Pandora neoaphidis (Remaudière and Hennebert) Humber (Zygomycetes: Entomophthorales) in the Myzus persicae (Sulzer) Complex (Homoptera: Aphididae) on Three Species of Brassica in the Fall and Winter

2001 ◽  
Vol 36 (2) ◽  
pp. 152-161 ◽  
Author(s):  
Surendra K. Dara ◽  
Paul J. Semtner
Keyword(s):  
Myzus Persicae ◽  
Host Plants ◽  
Green Peach Aphid ◽  
Average Level ◽  
Low Levels ◽  
Pandora Neoaphidis ◽  
Aphid Pathogen ◽  
Tobacco Aphid

The incidence of the aphid pathogen, Pandora neoaphidis (Remaudière & Hennebert) Humber, was monitored in populations of the Myzus persicae (Sulzer) complex (green peach aphid, M. persicae, and the tobacco aphid, M. nicotianae Blackman) on fall-planted cabbage, spinach-mustard, and turnip from 1993 to 1996. Each fall, the pathogen occurred at moderate levels in M. persicae complex on all three hosts. Average level of mycoses on the three host plants ranged from 10.0 to 14.3% in 1993, from 5.9 to 10.1% in 1994, and from 7.9 to 17.4% in 1995. Each year, the highest incidence of the pathogen in aphids on turnip and spinach-mustard was 20 to 25%, while the incidence on cabbage was 12 to 19%. In 1995 and over the 3 yrs combined, the levels of mycoses were significantly higher (P ≤ 0.05) in aphids on turnip and spinach-mustard than on cabbage. Trends were similar in 1993 and 1994, but differences were not significant. Very low numbers of healthy aphids (<2 per 5 plants in 1994 to 5 aphids per 5 plants in late April 1996) and those infected with or killed by P. neoaphidis occurred on turnip, cabbage, and spinach-mustard from Jan to May. The M. persicae complex was significantly more abundant on cabbage than it was on spinach-mustard or turnip. The pathogen overwinters at very low levels in cadavers of M. persicae complex on Brassica.

scholarly journals Ants defend aphids against lethal disease

2009 ◽  
Vol 6 (2) ◽  
pp. 205-208 ◽  
Author(s):  
Charlotte Nielsen ◽  
Anurag A. Agrawal ◽  
Ann E. Hajek
Keyword(s):  
Social Insects ◽  
Natural Enemies ◽  
Disease Transmission ◽  
Field Experiments ◽  
Fungal Infections ◽  
Pandora Neoaphidis ◽  
Aphid Pathogen ◽  
Formica Podzolica

Social insects defend their own colonies and some species also protect their mutualist partners. In mutualisms with aphids, ants typically feed on honeydew produced by aphids and, in turn guard and shelter aphid colonies from insect natural enemies. Here we report that Formica podzolica ants tending milkweed aphids, Aphis asclepiadis , protect aphid colonies from lethal fungal infections caused by an obligate aphid pathogen, Pandora neoaphidis . In field experiments, bodies of fungal-killed aphids were quickly removed from ant-tended aphid colonies. Ant workers were also able to detect infective conidia on the cuticle of living aphids and responded by either removing or grooming these aphids. Our results extend the long-standing view of ants as mutualists and protectors of aphids by demonstrating focused sanitizing and quarantining behaviour that may lead to reduced disease transmission in aphid colonies.

scholarly journals Epizootiological Modeling of Pandora neoaphidis Mycosis Transmission in Myzus persicae Colonies Initiated by Primarily Infected Alates

2005 ◽  
Vol 71 (7) ◽  
pp. 4104-4107 ◽  
Author(s):  
Chun Chen ◽  
Ming-Guang Feng
Keyword(s):  
Survival Time ◽  
Infection Rate ◽  
Myzus Persicae ◽  
Primary Infection ◽  
Gompertz Model ◽  
Flight Distance ◽  
Pandora Neoaphidis

ABSTRACT Pandora neoaphidis transmission was monitored within progeny colonies initiated by infected Myzus periscae alates individually flown for 1 to 5 h. Mycosis progress in the colonies was well fitted (r 2 = 0.97) to a modified logistic or Gompertz model that included their flight distance, postflight survival time, premycosis fecundity, and primary infection rate as influential variables.

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