The influence of environmental factors on the persistence of Zoophthora radicans conidia

Furlong, MJ and Pell, JK (1997) The influence of environmental factors on the persistence of Zoophthora radicans conidia. Journal of Invertebrate Pathology, 69 3: 223-233. doi:10.1006/jipa.1996.4649


Author Furlong, MJ
Pell, JK
Title The influence of environmental factors on the persistence of Zoophthora radicans conidia
Journal name Journal of Invertebrate Pathology   Check publisher's open access policy
ISSN 0022-2011
Publication date 1997-05-01
Year available 1997
Sub-type Article (original research)
DOI 10.1006/jipa.1996.4649
Open Access Status DOI
Volume 69
Issue 3
Start page 223
End page 233
Total pages 11
Place of publication SAN DIEGO
Publisher ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS
Language eng
Abstract The ability of Zoophthora radicans conidia to infect and induce mycosis in Plutella xylostella larvae was dramatically reduced after just 24 hr field exposure in the Cameron Highlands, Malaysia. In laboratory studies some conidia retained infectivity for up to 16 days on the surface of foliage or soil. The rate at which conidia lost infectivity was greater on the adaxial leaf surface than on the abaxial leaf surface and greater on soil with a low moisture content than on soil with a higher moisture content. One hour of simulated heavy rainfall had no impact on the ability of primary conidia on either the adaxial or abaxial leaf surface to induce mycosis in test larvae; 3 hr rainfall significantly reduced the level of infection induced in larvae bioassayed on the adaxial leaf surface. When primary conidia were incubated on leaf surfaces under conditions of high humidity to encourage capilliconidia development and then subjected to heavy rainfall, 1 hr of exposure significantly reduced the level of mycosis induced in test larvae bioassayed on adaxial but not abaxial leaf surfaces. Exposure of primary conidia to natural, temperate solar radiation for 4 hr did not affect the level of mycosis induced in test larvae. Ultraviolet and simulated tropical solar radiation were both damaging to conidia, although capilliconidia were significantly more tolerant to radiation than primary conidia. The ability to induce mycosis in test larvae was not affected by 1 hr of exposure to simulated tropical solar radiation but 4 hr exposure significantly reduced the level of mycosis induced in test larvae. Eight hours of exposure had no further affect on the level of mycosis induced by secondary capilliconidia but did reduce the level induced by primary conidia. Solar radiation is considered to be the major environmental factor affecting Z. radicans persistence. The results are discussed in relation to the use of Z. radicans for P. xylostella control. (C) 1997 Academic Press.
Keyword entomopathogenic fungus
Entomophthorales
Zoophthora radicans
persistence
infectivity
solar radiation
rainfall
biological control
Plutella xylostella
Cameron Highlands, Malaysia
Plutella-Xylostella Lepidoptera
Erynia-Radicans
Metarhizium-Flavoviride
Entomophthorales
Rain
Capilliconidia
Yponomeutidae
Zygomycotina
Germination
Temperature
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: ResearcherID Downloads - Archived
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 31 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 36 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Wed, 12 Sep 2012, 03:49:16 EST by System User