Biology of Tetranychus “multisetis,” the Polychaetous Form of Tetranychus cinnabarinus (Acarina: Tetranychidae)
- 1 January 1961
- journal article
- research article
- Published by Oxford University Press (OUP) in Annals of the Entomological Society of America
- Vol. 54 (1) , 30-34
- https://doi.org/10.1093/aesa/54.1.30
Abstract
The mite studied was originally identified as Tetranychus multisetis McGregor, which is now regarded as a polychaetous form of T. cinnabarinus (Boisd.). No outstanding differences were found between it and either T. telarius (L.) or T. cinnabarinus in regard to the effect of temperature on each life stage or the sizes of the various instars. Some variations in host range were noted which did not agree with published records on T. telarius. Comparative feeding tests were inconclusive. A temperature of about 32° C, with a fairly low humidity, appeared to provide optimum conditions; high humidities delayed hatching of eggs and emergence of active mites from the quiescent stages. Females averaged 67% of the offspring reared from five fertilized females, but the sex ratio varied considerably in the offspring of the various individual parents.Keywords
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