Gypsy moth (Lepidoptera: Lymantriidae) consumption and utilization of northern red oak and white oak foliage exposed to simulated acid rain and ozone
- Northeastern Forest Experiment Station, Delaware, OH (United States)
Two-year-old seedlings of white oak, Quercus alba L., and red oak, Q. rubra L., were exposed to ozone (O[sub 3]) fumigations in four continuously stirred tank reactor chambers in the greenhouse for 8 h/d, 3 d/wk for 6 wk. Fumigation treatments were charcoal-filtered air (CFA) and CFA + 0.15 ppm O[sub 3]. Two simulated rain treatments, pH 4.2 and pH 3.0, of-1.25 cm were applied once each week in rain-simulation chambers. Gypsy moth, Lymantria dispar (L.), third instars were allowed to feed on leaf disks from treated seedlings for 24 h. Leaf area consumed, food assimilated, weight gain, and relative growth rate (RGR) were examined. Overall, larvae fed white oak foliage consumed more foliage and gained more weight than those fed red oak foliage. Response to the fumigation and rain treatments was different for each oak species. On white oak foliage, larvae consumed significantly less foliage treated with CFA + pH 3.0 rain, but the lowest RGR occurred with the 0.15 ppm O[sub 3] + pH 4.2 rain treatment. The most food assimilated, greatest weight gain, and highest RGR occurred with the CFA + pH 4.2 rain control. Red oak foliage consumed was equivalent for all treatments, but foliage exposed to CFA + pH 3.0 rain resulted in more food assimilated, greater weight gain, and higher RGR for that species.
- OSTI ID:
- 6444938
- Journal Information:
- Environmental Entomology; (United States), Vol. 22:3; ISSN 0046-225X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACID RAIN
BIOLOGICAL EFFECTS
LYMANTRIA DISPAR
GROWTH
OZONE
FOOD
LARVAE
LEAVES
LEPIDOPTERA
OAKS
SIMULATION
WEIGHT
ANIMALS
ARTHROPODS
ATMOSPHERIC PRECIPITATIONS
INSECTS
INVERTEBRATES
MAGNOLIOPHYTA
MAGNOLIOPSIDA
MOTHS
PLANTS
RAIN
TREES
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