Change of the intrinsic rate of population increase of Tetranychus urticae Koch (Acari: Tetranychidae) following hexythiazox treatment

Sublethal effects of hexythiazox were assessed through the intrinsic rate of increase of survivors following application to different developmental stages of Tetranychus urticae. Experimental treatments inducing differential mortality in immature stages were used while the recommended field rate of...

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Bibliographic Details
Published inPesticidi (Beograd) Vol. 14; no. 4
Main Author Sekulic, D.R. (Poljoprivredni fakultet, Beograd - Zemun (Yugoslavia))
Format Journal Article
LanguageSerbian
Published 01.10.1999
Subjects
ACARICIDAS
ACARICIDE
ACARICIDES
CRECIMIENTO DE LA POBLACION
CROISSANCE DE LA POPULATION
EXPERIMENTACION EN LABORATORIO
EXPERIMENTATION EN LABORATOIRE
LABORATORY EXPERIMENTATION
MORTALIDAD
MORTALITE
MORTALITY
PHASEOLUS VULGARIS
POPULATION GROWTH
TETRANYCHUS URTICAE
TOXICIDAD
TOXICITE
TOXICITY
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Summary:Sublethal effects of hexythiazox were assessed through the intrinsic rate of increase of survivors following application to different developmental stages of Tetranychus urticae. Experimental treatments inducing differential mortality in immature stages were used while the recommended field rate of hexythiazox (50 mg/L) was used against adult. Survivors exposed to hexythiazox as deutonymphs were the only stage influencing the intrinsic rate of increase. They had decreased longevity and net fecundity rate. Biologically significant effects were observed in individuals, which survived hexythiazox applications causing over 90% mortality. Below that mortality level the effect rapidly decreased. Other developmental stages were not affected regardless of the mortality level achieved hexythiazox application.
Bibliography:H10
2000000419
ISSN:0352-9029