Biogenic amines in protocerebral A2 neurosecretory neurons of Lymantria dispar L. (Lepidoptera:Lymantriidae): Response to trophic stress

The number, morphometric parameters and amount of aminergic neurosecretory product of protocerebral A2 neurosecretory neurons were investigated in the fifth instar of Lymantria dispar caterpillars, following a suitable or unsuitable trophic regime. Caterpillars originated from two populations (Quercus rubra or Robinia pseudoacacia forest) and were differently adapted to trophic stress, i.e. feeding on locust tree leaves - unsuitable host plant. The number of neurosecretory neurons was higher in the caterpillars originated from Robinia population than in Quercus population, regardless of feeding. A2 neurosecretory neurons, nuclei and their nucleoli were larger in caterpillars fed with unsuitable leaves in both populations. There was more aminergic product in the A2 neurosecretory neurons of the caterpillars fed with unsuitable leaves independently of population origin.

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The specific response of gypsy moth A1 neurosecretory neurons to different environmental stressors

Biologia ◽

10.2478/s11756-014-0446-9 ◽

2014 ◽

Vol 69 (10) ◽

Cited By ~ 1

Author(s):

Larisa Ilijin ◽

Marija Mrdaković ◽

Vesna Perić-Mataruga ◽

Dajana Todorović ◽

Jelica Lazarević ◽

...

Keyword(s):

Tannic Acid ◽

Lymantria Dispar ◽

Artificial Diet ◽

Environmental Temperature ◽

Morphometric Parameters ◽

Environmental Stressors ◽

Synthetic Activity ◽

Specific Response ◽

Neurosecretory Neurons ◽

Dry Food

AbstractChanges in the number and morphometric parameters of A1 neurosecretory neurons (nsn) were analyzed in Lymantria dispar 4th instar caterpillars, exposed for 3 days to different stressors: cadmium, high temperature and tannic acid. The relative cytoplasm density of A1 nsn was also estimated. Caterpillars reared on a diet supplemented with cadmium exhibited increased size of A1 nuclei (10 and 250 μg Cd per g of dry food weight), increased number of nucleolii in nuclei and raised relative cytoplasm density in all experimental groups. Cadmium obviously induces intensive synthetic activity in A1 nsn. The second stressor was high environmental temperature of 35°C. Decrease of all analyzed morphometric parameters suggests that acute exposure of 4th instar caterpillars to 35°C, as well as 12 h recovery at optimal temperature of 23°C, reduced the activity of A1 nsn. Tannic acid was added to the artificial diet in the following concentrations: 1%, 2.5% and 5%. All estimated morphological parameters did not change after addition 1 and 2.5% of tannic acid. After addition of 5% of tannic acid, the activity of A1 nsn declined.

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Competition between the gypsy moth, Lymantria dispar, and the northern tiger swallowtail, Papilio canadensis: interactions mediated by host plant chemistry, pathogens, and parasitoids

Oecologia ◽

10.1007/s004420000444 ◽

2000 ◽

Vol 125 (2) ◽

pp. 218-228 ◽

Cited By ~ 54

Author(s):

Ahnya M. Redman ◽

J. Mark Scriber

Keyword(s):

Host Plant ◽

Gypsy Moth ◽

Lymantria Dispar ◽

Plant Chemistry ◽

Papilio Canadensis ◽

Tiger Swallowtail

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Variability of morphometric leaf characteristics of black poplar from the area of Vojvodina

Glasnik Sumarskog fakulteta ◽

10.2298/gsf1409063c ◽

2014 ◽

pp. 63-72 ◽

Cited By ~ 3

Author(s):

Dijana Cortan ◽

Mirjana Sijacic-Nikolic ◽

Radmila Knezevic

Keyword(s):

Morphological Differentiation ◽

Morphometric Parameters ◽

Specific Gene ◽

Considerable Variability ◽

Mean Values ◽

Interpopulation Variability ◽

Black Poplar ◽

Significant Difference ◽

The Mean ◽

Two Populations

A morphological study of intra and interpopulation variability of black poplar leaves was conducted in two populations in the area of Vojvodina. Nine morphometric parameters of leaves have been analyzed. The results indicate that there is considerable variability within and between the populations. Morphological differentiation is clearly represented with the average values of analyzed parameters and a statistically significant difference between the mean values. On the basis of the obtained data, it has been concluded that the variability within the two populations is much more expressed than the variability between them. The uniformity of environmental conditions of the studied locations indicates that this variability is a consequence of the specific gene pool of the studied populations.

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Development of gypsy moth (Lymantria dispar L) on the foliage of Quercus cerris L., Q. Petraea (matt) Liebl. and Q. Robur L. in the controlled conditions

Glasnik Sumarskog fakulteta ◽

10.2298/gsf0796055m ◽

2007 ◽

pp. 55-67 ◽

Cited By ~ 2

Author(s):

Slobodan Milanovic

Keyword(s):

Relative Humidity ◽

Host Plant ◽

Gypsy Moth ◽

Lymantria Dispar ◽

Environmental Conditions ◽

Quercus Robur ◽

Quercus Petraea ◽

The Other ◽

Study Results ◽

Quercus Cerris

The development of Gypsy moth (Lymantria dispar L) was monitored in laboratory conditions, on the foliage of the species Quercus cerris L. Quercus petraea (Matt) Liebl. and Quercus robur L. The experiment was established in the controlled environmental conditions, at the temperature of 25?C, photoperiod 14:10 (day: night) and relative humidity 70%. The objective of the research was to determine the suitability of the study host plant species for gypsy moth development. The study results show that Gypsy moth caterpillars cultivated on Q. petraea foliage had a lower survival, higher number of moultings, longer preadult development and lower fecundity, which makes this species less suitable compared to the other two. Gypsy moth caterpillars cultivated on Q. cerris foliage had the highest survival degree the lowest number of moultings, the shortest preadult development and the highest fecundity, which makes this species the most favourable for gypsy moth development. Q. robur was between the former two species in this respect.

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The influence of host plant on gut conditions of gypsy moth (Lymantria dispar) caterpillars

Journal of Insect Physiology ◽

10.1016/0022-1910(94)00106-q ◽

1995 ◽

Vol 41 (3) ◽

pp. 241-246 ◽

Cited By ~ 42

Author(s):

H.M. Appel ◽

L.W. Maines

Keyword(s):

Host Plant ◽

Gypsy Moth ◽

Lymantria Dispar

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Comparing Negative Impacts of Prunus serotina, Quercus rubra and Robinia pseudoacacia on Native Forest Ecosystems

Forests ◽

10.3390/f10100842 ◽

2019 ◽

Vol 10 (10) ◽

pp. 842 ◽

Cited By ~ 11

Author(s):

Gentili ◽

Ferrè ◽

Cardarelli ◽

Montagnani ◽

Bogliani ◽

...

Keyword(s):

Invasive Species ◽

Plant Species ◽

Forest Ecosystems ◽

Quercus Rubra ◽

Robinia Pseudoacacia ◽

Prunus Serotina ◽

Native Forest ◽

Alien Plant Species ◽

Alien Plant ◽

Negative Impacts

The introduction of invasive alien plant species (IAPS) can modify plant-soil feedback, resulting in an alteration of the abiotic and biotic characteristics of ecosystems. Prunus serotina, Quercus rubra and Robinia pseudoacacia are IAPS of European temperate forests, where they can become dominant and suppress the native biodiversity. Assuming that the establishment of these invasive species may alter native forest ecosystems, this study comparatively assessed their impact on ecosystems. This study further investigated plant communities in 12 forest stands, dominated by the three IAPS and native trees, Quercus robur and Carpinus betulus (three plots per forest type), in Northern Italy, and collected soil samples. The relationships between the invasion of the three IAPS and modifications of humus forms, soil chemical properties, soil biological quality, bacterial activity and plant community structure and diversity (α-, β-, and γ-diversity) were assessed using one-way ANOVA and redundancy analyses (RDA). Our comparative study demonstrated that invaded forests often had unique plant and/or soil properties, relative to native forests, and the degree of dissimilarity depended on the invasive species. Particularly, Q. rubra is related to major negative impacts on soil organic horizons and low/modified levels of microarthropod and plant biodiversity. R. pseudoacacia is associated with an altered base content of soil and, in turn, with positive feedback to the soil biological quality (QBS-ar) and plant diversity, but with a high cover compared with other alien plant species. P. serotina is associated with intermediate impacts and exhibits a plant species assemblage that is more similar to those of native forest stands. Our work suggests impact-based management decisions for the three investigated IAPS, since their effects on the diversity and composition of resident ecosystems are very different.

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Biology and ecology of Appendiseta robiniae (Hemiptera: Aphidoidea) — an alien species in Europe

Open Life Sciences ◽

10.2478/s11535-012-0034-3 ◽

2012 ◽

Vol 7 (3) ◽

pp. 487-494 ◽

Cited By ~ 1

Author(s):

Beata Borowiak-Sobkowiak ◽

Roma Durak

Keyword(s):

Alien Species ◽

Host Plant ◽

Robinia Pseudoacacia ◽

Developmental Time ◽

Species Occurrence

AbstractElements of the biology and ecology of A. robiniae were studied in Poland during the period of 2008–2009. The term of spring hatching, number of generations per season, developmental time of particular generations, lifespan of specimens and fecundity of particular generations were all defined. The dynamics of the species’ occurrence on its host plant were also determined. The two-year study showed a maximum of 11 aphid generations can develop on Robinia pseudoacacia. Females of the second and third generations were found to be the most fertile. These findings indicate that the species has adapted well in Poland and its biological predispositions have enabled it to rapidly increase in population.

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