Abstract
The preference in the choice of hibernacula of the convergent lady beetle,Hippodamia convergens Guérin-Meneville, was investigated with regard to morphological aspects of 2 introduced range grasses,Panicum coloratum (L.), andEragrostis curvula (Schrad.) Beetles strongly preferred tussocks with a ratio in the range of 1.0–3.0 stems per cm2 for lovegrass. Preference for klein grass tussocks ranging from 110–130 stems/clump was found. No preference was shown for a particular tussock circumference. It was demonstrated that tussocks could successfully be designated as suitable for beetle aggregation.
Résumé
Le choix des lieux d'hivernation de la coccinelleHippodamia convergens Guérin-Méneville a été étudié à l'égard des caractéristiques morphologiques de 2 graminées introduites:Panicum coloratum (L.) etEragrostis curvula (Schrad.) Les insectes préfèrent de beaucoup les touffes d'agrostis ayant en moyenne 1 à 3 tiges par cm2. Une préférence pour les touffes de panic comportant de 110 à 130 tiges par touffe a été mise en évidence. Il n'y a pas de préférence pour une forme particulière de l'extérieur de la touffe. Avec ces données on peut désigner avec succès les touffes favorables au rassemblement des coccinelles.
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Journal article number 3813 of the Oklahoma Agriculture Experiment Station.
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Yanes, J., Cartwright, B.O., Eikenbary, R.D. et al. Preference for medium dense grass tussocks byHippodamia convergens [Col.: Coccinellidae] . Entomophaga 27, 55–59 (1982). https://doi.org/10.1007/BF02371937
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DOI: https://doi.org/10.1007/BF02371937