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RATES OF FEEDING, OVIPOSITION, DEVELOPMENT, AND SURVIVAL OF LIRIOMYZA TRIFOLII (BURGESS) (DIPTERA: AGROMYZIDAE) ON SEVERAL WEEDS1

Published online by Cambridge University Press:  31 May 2012

Robert F. Smith  and
J.M. Hardman
Robert F. Smith
Affiliation:
Agriculture Canada Research Station, Kentville, Nova Scotia, Canada B4N 1J5
J.M. Hardman
Affiliation:
Agriculture Canada Research Station, Kentville, Nova Scotia, Canada B4N 1J5
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Abstract

In free-choice trials with Liriomyza trifolii (Burgess), a serious greenhouse pest, and 16 species of weeds commonly found near greenhouses in Nova Scotia, the leafminer produced feeding punctures and mines in every weed tested. There were wide variations in mean numbers of punctures per plant and larval mines per plant and less pronounced variations in the mean ratios of punctures to mines. In single-host trials, development time and survival of larval and pupal L. trifolii were determined on 10 of these weeds and on Chrysanthemum morifolium cv. White Marble. Pupal survival with all weeds was as high or higher than with chrysanthemum and larval survival was as high or higher than with chrysanthemum in 6 of the 10 weeds. Time from oviposition to adult emergence was as short as that on chrysanthemum on two weeds and shorter on six others. Only creeping Charlie, Glechoma hederacea, was an unsuitable host with no larvae developing to the pupal stage. The ability of L. trifolii to use common weeds as alternate hosts indicates that weed control in and around greenhouses should be included in any program to protect greenhouse chrysanthemums from this leafminer.

Résumé

Lors de tests de choix multiples impliquant Liriomyza trifolii (Burgess), un nuisible important en serres, face à 16 espèces de mauvaises herbes communes autour des serres en Nouvelle-Écosse, la mineuse a produit des trous d’alimentation et des mines larvaires chez toutes les espèces. On a observé des variations importantes des nombres moyens de trous par plant et de mines par plant, et des variations plus faibles du rapport moyen trous/mines. On a déterminé le temps moyen de développement et la survie larvaire et pupale de L. trifolii par des tests à un seul hôte impliquant 10 mauvaises herbes et le Chrysanthemum morifolium cv. White Marble. La survie pupale était au moins aussi élevée sur les mauvaises herbes que sur le chrysanthème dans 6 des 10 cas. La durée de la ponte jusqu’à l’émergence de l’adulte était aussi brève que chez le chrysanthème chez deux mauvaises herbes et plus courte dans six cas. Seule la gnaphale des vases, Glechoma hederacea, s’est avérée non convenable, aucune larve n’ayant atteint le stade pupal chez cet hôte. La capacité de L. trifolii à utiliser comme hôte des mauvaises herbes communes indique que la répression de ces plantes autour et à l’intérieur des serres devrait faire partie de tout programme de protection des chrysanthèmes de serre contre la mineuse.

Type
Articles
Information
The Canadian Entomologist , Volume 118 , Issue 8 , August 1986 , pp. 753 - 759
Copyright
Copyright © Entomological Society of Canada 1986

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