Consumption of Foliage of Juvenile and Mature Red Oak Trees by Late Instar Gypsy Moth Larvae12

Braham, Richard R.; Witter, John A.

doi:10.1093/jee/71.3.425

Cited by 5 publications

(2 citation statements)

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“…Bess (1 961) reports 5 year mean mortalities in three Connecticut forests as 25.6% in the first stadia, 23.2% in the second, 28.3% in the third and 3 1.2% in the fourth. The possible bias arising from differential mortality is in part discounted by the far greater defoliation caused by a later instar larva (Forbush & Fernald, 1896;Braham & Witter, 1978). Feeding preferences of later instar larvae thus better reflect a tree's susceptibility t o loss of foliage through gypsy moth defoliation.…”

Section: E'mentioning

confidence: 99%

Estimating the susceptibility of tree species to attack by the gypsy moth, Lymantria dispar

Lechowicz¹,

Jobin

1983

Ecological Entomology

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1. Numbers of gypsy moth larvae feeding on each of 922 randomly sampled trees in a Quercus-Acer-Fraxinus forest in southwestern Quebec, Canada were counted in 1979 and in 1980 to quantify the larval feeding preferences as observed in the field for eighteen deciduous and one coniferous tree species at the northern range limit of the gypsy moth.2. Both the diameter at breast height (dbh) and the estimated foliage biomass of the sampled trees were used to calculate the relative proportions of foliage represented by each of the nineteen tree species in the forest canopy. With these data on availability and utilization of the tree species by the gypsy moth larvae an Ivlev-type electivity index was used to quantify the larval feeding preferences. These preferences observed in the field define the susceptibility of a tree species to attack by the gypsy moth.3. The feeding preferences calculated using estimated foliage biomass were comparable to the simpler calculation based on dbh (Spearman's rho = 0.79; P= 0.0001). The dbh-based feeding preferences remained almost unchanged in 1979 and 1980 (Spearman's rho=0.83;P=0.0001).4. The composite 1979-80, dbh-based feeding preferences show Quercus rubra, Populus grandidentata, Ostrya virginiana, Amelanchier spp. and Acer saccharum were preferentially attacked by gypsy moth. Prunus serotina, Betula lutea, Acer rubrurn, A.pensylvanicum, Fraxinus americana, Urnus rubra, P.pensylvanicum and B.papyrifera were avoided. All nineteen tree species were, however, utilized to at least some degree by gypsy moth larvae. 5. These results quantitatively affirm and clarify earlier reports of gypsy moth feeding preferences in North America and Eurasia. The advantages and limitations of using an electivity index to estimate the susceptibility of different tree species to attack by folivores like the gypsy moth are discussed.

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Section: E'mentioning

confidence: 99%

Estimating the susceptibility of tree species to attack by the gypsy moth, Lymantria dispar

Lechowicz¹,

Jobin

1983

Ecological Entomology

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“…One such study by Braham and Witter [30] found that the age of northern red oak (Q. rubra L.) foliage had no effect on the development of gypsy moth larvae. Furthermore, Cambini and Magnoler [31] compared gypsy moth larvae reared on juvenile foliage with those reared on a mixture of juvenile and mature foliage from cork oak (Q. suber L.) and holm oak.…”

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Foliage maturity of Quercus ilex affects the larval development of a Croatian coastal population of Lymantria dispar (Lepidoptera: Erebidae)

et al. 2017

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Gypsy moth (Lymantria dispar) is one of the most important forest pests in the world. Numerous previous studies focused only on different host tree species, but small number of them on foliage age. Since recent genetic analyses showed that there are significant differences between Croatian continental and coastal population we investigated coastal population since there was no previous research. For this research juvenile and mature foliage of Holm oak (Quercus ilex) was used. Larval development was investigated in two laboratory experiments. One experiment involved rearing trials consisting of 50 individual larvae per treatment while a parallel experiment investigated gregarious feeding conditions using 120 larvae in a rearing treatment. Larval mortality was lower and development time shorter for individuals reared on juvenile foliage. High pupation success in both the individual and group rearing experiment for larvae reared on juvenile foliage was also observed. To conclude, our results showed high mortality, poor larval development and low pupation success in larvae reared on mature foliage. This research is significant because in the aspect of ongoing climate changes there is a possibility that gypsy moth will move to the north and shift its distribution by expanding into new climatic area.

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10.1007/BF00300756

2011

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Consumption of Foliage of Juvenile and Mature Red Oak Trees by Late Instar Gypsy Moth Larvae12

Cited by 5 publications

References 0 publications

Estimating the susceptibility of tree species to attack by the gypsy moth, Lymantria dispar

Estimating the susceptibility of tree species to attack by the gypsy moth, Lymantria dispar

Foliage maturity of Quercus ilex affects the larval development of a Croatian coastal population of Lymantria dispar (Lepidoptera: Erebidae)

10.1007/BF00300756

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