scholarly journals Changes in Lymantria dispar protocerebral neurosecretory neurons after exposure to cadmium

2011 ◽  
Vol 63 (4) ◽  
pp. 1287-1292 ◽  
Author(s):  
Larisa Ilijin ◽  
Milena Vlahovic ◽  
Marija Mrdakovic ◽  
Dragana Matic ◽  
Jelica Lazarevic ◽  
...  
Keyword(s):  
Gypsy Moth ◽  
Lymantria Dispar ◽  
Artificial Diet ◽  
Nuclear Size ◽  
Morphometric Characteristics ◽  
Weight Changes ◽  
Neurosecretory Neurons ◽  
Dry Food ◽  
Size Of Nuclei

Gypsy moth 4th instar caterpillars were fed for 3 days with an artificial diet supplemented with increasing cadmium (Cd) concentrations (0, 10, 30, 100 and 250 ?g?g of dry food weight). Changes in the morphometric characteristics of A1? dorso-medial and L2 dorso-lateral neurosecretory neurons (nsn) were analyzed. In the A1? nsn, Cd supplements led to an enhanced nuclear size, except in the group treated with 250 ?g Cd?g in the form of dry food. The size of L2 type nsn was increased in the groups provided with 30 and 100 ?g Cd?g, while no differences in the size of nuclei was detected in L2 neurons among the experimental groups.

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

Biologia ◽  
2014 ◽  
Vol 69 (10) ◽  
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.

An Artificial Diet for Larvae of Calosoma sycophanta (Coleoptera: Carabidae), a Gypsy Moth (Lepidoptera: Lymantriidae) Predator

1998 ◽  
Vol 33 (3) ◽  
pp. 233-240 ◽  
Author(s):  
Ronald M. Weseloh
Keyword(s):  
Gypsy Moth ◽  
Lymantria Dispar ◽  
Artificial Diet ◽  
Chicken Meat ◽  
Larval Diet ◽  
Beef Liver

A newly-developed larval diet for Calosoma sycophanta L. consists of beef liver and chicken meat. Larvae reared individually on this diet develop at about the same rate and have the same survival as those fed gypsy moth pupae, Lymantria dispar L., the usual prey of the beetle. However, adults of diet-reared larvae were significantly smaller than adults of larvae reared on gypsy moth pupae. When reared in groups on the diet, beetles were significantly smaller and did not survive as well as those fed gypsy moth pupae. This diet, or a variation thereof, may be useful as part of a program to rear the beetle inexpensively.

The effects of acute exposure to magnetic fields on morphometric characteristics of bombyxin-producing neurosecretory neurons in gypsy moth caterpillars

2011 ◽  
Vol 87 (5) ◽  
pp. 461-471 ◽  
Author(s):  
Larisa Ilijin ◽  
Milena Vlahovićć ◽  
Marija Mrdakovićć ◽  
Dejan Mirččićć ◽  
Zlatko Prolićć ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Gypsy Moth ◽  
Acute Exposure ◽  
Morphometric Characteristics ◽  
Neurosecretory Neurons

scholarly journals Activity of gypsy moth dorsolateral neurosecretory neurons under increased rearing density

2012 ◽  
Vol 64 (3) ◽  
pp. 1085-1092
Author(s):  
Larisa Ilijin ◽  
Milena Vlahovic ◽  
Marija Mrdakovic ◽  
Jelica Lazarevic ◽  
Dragana Matic ◽  
...  
Keyword(s):  
Gypsy Moth ◽  
Lymantria Dispar ◽  
Larval Instar ◽  
Petri Dish ◽  
Control Group ◽  
Neurosecretory Neurons ◽  
Rearing Density ◽  
Molecular Masses ◽  
Group 5

Lymantria dispar caterpillars were reared under two different rearing densities for the first three days of the 4th larval instar: 5 larvae that were kept in a Petri dish (V = 80 ml) belonged to the intense stress (D1 group); 5 larvae that were kept in a plastic cup (V = 300ml) belonged to the group exposed to less intense stress (D2 group). In the control group, single larvae were reared in a Petri dish. Morphometric changes in L1, L2 and L2? dorsolateral neurosecretory neurons (nsn) were analyzed. After keeping 5 larvae in a Petri dish, the size of L2 neurosecretory neurons (nsn) significantly increased. Rearing 5 larvae in a plastic cup significantly increased the size of L1 nsn nuclei and the number of L2?nsn. A decrease in relative band densities in the region of molecular masses (11-15 kD) that correspond to prothoracicotropic hormones in the gypsy moth was observed in the electrophoretic profiles that were obtained after both treatments in comparison to the control group.

scholarly journals Susceptibility of the Gypsy Moth Lymantria dispar (Lepidoptera: Erebidae) to Nosema pyrausta (Microsporidia: Nosematidae)

Insects ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 447
Author(s):  
Anastasia G. Kononchuk ◽  
Vyacheslav V. Martemyanov ◽  
Anastasia N. Ignatieva ◽  
Irina A. Belousova ◽  
Maki N. Inoue ◽  
...  
Keyword(s):  
Gypsy Moth ◽  
Lymantria Dispar ◽  
Ostrinia Nubilalis ◽  
Host Plants ◽  
European Corn Borer ◽  
Artificial Diet ◽  
Western Siberia ◽  
Corn Borer ◽  
Baculovirus Infection ◽  
Diet Versus

The gypsy moth, Lymantria dispar, is a notorious forest defoliator, and various pathogens are known to act as natural regulators of its population density. As a widespread herbivore with a broad range of inhabited areas and host plants, it is potentially exposed to parasitic microorganisms from other insect hosts. In the present paper, we determined the susceptibility of gypsy moth larvae to the microsporidium Nosema pyrausta from the European corn borer, Ostrinia nubilalis. Gypsy moth samples from two localities of Western Siberia were used. N. pyrausta developed infections in the salivary gland and adipose tissue of gypsy moth prepupae and pupae, forming spore masses after 30 days of alimentary exposure to the second instar larvae. Among the experimental groups, the infection levels ranged from 0 to 9.5%. Effects of a covert baculovirus infection, phenylthiourea pretreatment and feeding insects on an artificial diet versus natural foliage were not significant in terms of microsporidia prevalence levels. Thus, L. dispar showed a low level of susceptibility to a non-specific microsporidium. It can be referred to as a resistant model host and not an appropriate substitute host for laboratory propagation of the microsporidium.

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