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Biological control of puncturevine Tribulus terrestris in California after twenty years of activity of introduced weevils

Journal Article

Huffaker C; Hamai J; Nowierski R

‚Äč

1983

Entomophaga

28

387-400

Fifteen years of field tests were conducted in California on 1200 plots infested with the annual puncturevine (Tribulus terrestris L.) in order to examine the effect of 2 introduced weevilsMicrolarinus lareynii (Jacquelin du Val) andM. lypriformis Wollaston (Col.: Curculionidae) on puncturevine. Since 5 of the 6 series of plots marked a substantial reduction in viable seed production and puncturevine coverage it is suggested that the 2 introduced weevils curtailed the pucturevine population\s capacity to compensate in the natural situation and significantly contributed to the decline in puncturevine density.

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The Liana Ecology Project is supported by Marquette University and funded in part by the National Science Foundation.