Competition and other factors influencing the population dynamics of Aphis gossypii and Macrosiphoniella sanborni on greenhouse chrysanthemums

George Tamaki and William W. Allen

Hilgardia, 1969, vol. 39, issue 17

Abstract: Competition and other factors influencing the population dynamics of Aphis gossypii and Macrosiphoniella sanborni on greenhouse chrysanthemums were studied. Single- and mixed-species populations after an accelerated growth period, reached a moderately stable equilibrium phase. Removal of alate forms, which simulated dispersal, reduced the rate of population growth, but did not stabilize the populations. Because they were strongly influenced by aphid density, the main population regulating agents were aphid size (related to birth rate), and leaf mortality (related to death rate). Another indirect, regulating factor was high temperature, which killed more of the older leaves when they were infested with high aphid densities. Although Myzus persicae is the major aphid pest of greenhouse chrysanthemums in California, this study suggests that, in the absence of insecticides, M. sanborni and A. gossypii are better adapted to chrysanthemums.

Keywords: Environmental; Economics; and; Policy (search for similar items in EconPapers)
Date: 1969
References: Add references at CitEc
Citations:

Downloads: (external link)
https://ageconsearch.umn.edu/record/381576/files/v39n17p447.pdf (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:ags:hilgar:381576

Access Statistics for this article

More articles in Hilgardia from California Agricultural Experiment Station
Bibliographic data for series maintained by AgEcon Search ().