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Miller, Fredric D.
Wiegrefe, Sue

Susceptibility, preference, and suitability of Carpinus and Ostrya taxa for gypsy moth larvae (Lepidoptera: Lymantriidae)

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Twenty Carpinus taxa and three Ostrya taxa, growing in the tree breeding production area at The Morton Arboretum, Lisle, IL, were evaluated in laboratory bioassays for feeding susceptibility, preference, and suitability for gypsy moth (Lymantria dispar, L.) larvae. No-choice and multiple-choice laboratory feeding studies revealed that C. coreana, C. fargesii, C. laxiflora, and the hybrid C. caroliniana x C. orientalis were the least suitable for larval development and pupation, and were less preferred by gypsy moth larvae. Suitability rankings for gypsy moth larval development time were highly correlated with larval longevity, but the proportion of larvae pupating was not correlated with either larval longevity or with larval development time. Pupal fresh weights were not correlated with either larval longevity or with larval development time. However, larval dry frass weights were correlated with the proportion of larvae pupating, but not correlated with pupal fresh weights. Leaf toughness and leaf thickness do not appear to be factors in gypsy moth larval suitability and preference.
Volume, Issue, Page Number
54, 1, Article 5