Influence of food quantity and quality on polymorphic dispersal behaviors in the gypsy moth, Lymantria dispar

1981 ◽  
Vol 59 (2) ◽  
pp. 293-296 ◽  
Author(s):  
Pedro Barbosa ◽  
Whitney Cranshaw ◽  
Jane A. Greenblatt
Keyword(s):  
Light Source ◽  
Lymantria Dispar ◽  
Light Stimulus ◽  
Acer Rubrum ◽  
Red Maple ◽  
Food Quantity ◽  
Level Of Activity ◽  
Gypsy Moths ◽  
Influence Of Food ◽  
Abundance And Distribution

Egg masses produced by female gypsy moths (Lymantria dispar) reared on red oak (Quercus rubra) or red maple (Acer rubrum) exhibit differences in the abundance and distribution of different-sized eggs. Partial starvation of larvae has no significant effect on mean egg size, although it does have a significant effect on mean number of eggs per mass.Larvae from eggs of different sizes exhibit differences in level of activity when responding to a light source. Larvae from large eggs move more rapidly towards a light stimulus than those from small eggs. A greater proportion of the larvae from smaller eggs failed to move towards a light source compared with those from large eggs. The role of food in the activity and dispersal of first-instar gypsy moths is discussed.

The influence of food on developmental characteristics of the gypsy moth, Lymantria dispar (L.)

1977 ◽  
Vol 55 (9) ◽  
pp. 1424-1429 ◽  
Author(s):  
Pedro Barbosa ◽  
John L. Capinera
Keyword(s):  
Gypsy Moth ◽  
Lymantria Dispar ◽  
Host Species ◽  
Food Type ◽  
Red Oak ◽  
Red Maple ◽  
Gypsy Moths ◽  
Influence Of Food ◽  
Developmental Characteristics ◽  
Numerical Change

The host species consumed by larval gypsy moths have significant influences on their development. Feeding on red maple, red oak, synthetic food, and a diet of both oak and maple results in differences in mean frass production, pupal weights, and development times. Larvae feeding on the preferred food type, oak, consumed more food and produced heavier pupae than those that fed on nonpreferred maple. Development in oak-fed female larvae is significantly faster than in maple-fed female larvae. A relatively consistent proportion of extra-instar larvae of both sexes were found regardless of the food they feed upon. The implications of food type on numerical change in gypsy moth populations is discussed.

Decay of birdseye sugar maple (Acer Saccharum) and curly red maple (Acer Rubrum)

2020 ◽  
Vol 52 (3) ◽  
pp. 292-297
Author(s):  
Tara Lee Bal ◽  
Katherine Elizabeth Schneider ◽  
Dana L. Richter
Keyword(s):  
Acer Saccharum ◽  
Sugar Maple ◽  
Acer Rubrum ◽  
Red Maple

Vascular cambium necrosis in forest fires: using hyperbolic temperature regimes to estimate parameters of a tissue-response model

2004 ◽  
Vol 52 (6) ◽  
pp. 757 ◽  
Author(s):  
M. B. Dickinson ◽  
J. Jolliff ◽  
A. S. Bova
Keyword(s):  
Pinus Ponderosa ◽  
Forest Fires ◽  
Ponderosa Pine ◽  
Process Model ◽  
Acer Rubrum ◽  
Tissue Response ◽  
Vascular Cambium ◽  
Red Maple ◽  
Fixed Temperature ◽  
Temperature Regimes

Hyperbolic temperature exposures (in which the rate of temperature rise increases with time) and an analytical solution to a rate-process model were used to characterise the impairment of respiration in samples containing both phloem (live bark) and vascular-cambium tissue during exposures to temperatures such as those experienced by the vascular cambium in tree stems heated by forest fires. Tissue impairment was characterised for red maple (Acer rubrum), chestnut oak (Quercus prinus), Douglas fir (Pseudotsuga menziesii), and ponderosa pine (Pinus ponderosa) samples. The estimated temperature dependence of the model’s rate parameter (described by the Arrhenius equation) was a function of the temperature regime to which tissues were exposed. Temperatures rising hyperbolically from near ambient (30°C) to 65°C produced rate parameters for the deciduous species that were similar at 60°C to those from the literature, estimated by using fixed temperature exposures. In contrast, samples from all species showed low rates of impairment, conifer samples more so than deciduous, after exposure to regimes in which temperatures rose hyperbolically between 50 and 60°C. A hypersensitive response could explain an early lag in tissue-impairment rates that apparently caused the differences among heating regimes. A simulation based on stem vascular-cambium temperature regimes measured during fires shows how temperature-dependent impairment rates can be used to predict tissue necrosis in fires. To our knowledge, hyperbolic temperature exposures have not been used to characterise plant tissue thermal tolerance and, given certain caveats, could provide more realistic data more efficiently than fixed-temperature exposures.

Some changes in red maple, Acer rubrum, tissues within 34 days after wounding in July

1972 ◽  
Vol 50 (8) ◽  
pp. 1783-1784 ◽  
Author(s):  
John P. Rier ◽  
Alex L. Shigo
Keyword(s):  
Fluorescence Microscopy ◽  
Acer Rubrum ◽  
Red Maple

Fluorescence microscopy was used to show that during 34 days after the wounding of red maple, Acer rubrum, callose accumulated in the phloem, new xylary tissues formed, and plugs formed in vessels to 10 cm above and below the wounds.

Influence of genotype and soil on root fan structures of Acer rubrum

1970 ◽  
Vol 48 (1) ◽  
pp. 147-152
Author(s):  
Richard J. Medve
Keyword(s):  
Plant Communities ◽  
Acer Rubrum ◽  
Soil Types ◽  
Red Maple ◽  
Root Characteristics ◽  
Third Order ◽  
Soil Sterilization ◽  
Seed Sources ◽  
Order Root

Soils collected from eight different plant communities that contained red maples (Acer rubrum L.) had little effect on root fan structures of red maple seedlings. Seedlings from eight seed sources, grown in the same soil types, showed a significant amount of variation for third order root characteristics. Root fan structures, especially those characteristics relating to beaded rootlets, were significantly affected by soil sterilization. Root fan structures were more copious and developed more rapidly on indigenous seedlings than on seedlings grown under greenhouse conditions.

scholarly journals Weed Control for Pot-In-Pot Production using Preemergence Herbicides

2005 ◽  
Vol 23 (4) ◽  
pp. 204-211
Author(s):  
Donna C. Fare ◽  
Patricia Knight ◽  
Charles H. Gilliam ◽  
James Altland
Keyword(s):  
Weed Control ◽  
Acer Rubrum ◽  
Herbicide Tolerance ◽  
Green Ash ◽  
Red Maple ◽  
Weed Species ◽  
Magnolia Grandiflora ◽  
Pyrus Calleryana ◽  
Local Site ◽  
Preemergence Herbicides

Abstract Four experiments were conducted to investigate herbicides currently labeled for field and/or container production for use in pot-in-pot production. Southern magnolia (Magnolia grandiflora L.), red maple (Acer rubrum Spach. ‘Autumn Flame’ and ‘Franksred’), ornamental pear (Pyrus calleryana Decne. ‘Bradford’ and ‘Cleveland Select’), river birch (Betula nigra L.), green ash (Fraxinus pennsylvanica Marsh. and F. pennsylvanica Marsh.‘Marshall's Seedless’), and zelkova (Zelkova serrata Spach ‘Village Green’) were evaluated for herbicide tolerance. Barricade 65WG, Surflan 4AS, and Pendulum 60WDG, used alone or in combination with Princep and Gallery 75 DF, had no adverse effect on tree shoot growth or trunk caliper growth when applied as a directed band application. Weed control varied depending upon local site conditions, herbicide rate and weed species.

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