CARABIDAE (COLEOPTERA) ASSOCIATED WITH GYPSY MOTH, LYMANTRIA DISPAR (L.) (LEPIDOPTERA: LYMANTRIIDAE), POPULATIONS SUBJECTED TO BACILLUS THURINGIENSIS BERLINER TREATMENTS IN PENNSYLVANIA

1990 ◽  
Vol 122 (1) ◽  
pp. 123-129 ◽  
Author(s):  
E. Alan Cameron ◽  
R. Marcel Reeves
Keyword(s):  
Bacillus Thuringiensis ◽  
Gypsy Moth ◽  
Lymantria Dispar ◽  
Carabid Beetles ◽  
Pitfall Traps ◽  
Moth Population ◽  
Elisa Technique ◽  
Nucleopolyhedrosis Virus ◽  
Southwestern Pennsylvania ◽  
First Time

AbstractCarabid beetles were collected using pitfall traps and tree bands in forest stands in southwestern Pennsylvania subjected to defoliation by gypsy moth for the first time. Some of the stands were treated aerially with Bacillus thuringiensis Berliner (B.t.). The guts of all carabids collected were tested for the presence of gypsy moth proteins using the ELISA technique. Twenty-seven of the 33 species (82%) collected from pitfall traps, and four of the seven species (57%) collected under tree bands, tested positive. Of the 1142 individuals from pitfall traps and 73 individuals from tree bands, the percentages positive were 45 and 38%, respectively. Calosoma frigidum Kirby had the highest percentage positive (78%) of any species. Statistically significant differences in percentages positive between B.t.-treated and untreated plots were found only for Pterostichus mutus Say and P. coracinus Newm., and when all species were combined. The presence of nucleopolyhedrosis virus in the gypsy moth population was unanticipated and may have influenced these results through increased feeding on carrion.

scholarly journals Effectiveness of Diflubenzuron and Bacillus thuringiensis Against Gypsy Moth Populations

1997 ◽  
Vol 14 (3) ◽  
pp. 135-140 ◽  
Author(s):  
Kevin W. Thorpe ◽  
Richard L. Ridgway ◽  
Ralph E. Webb
Keyword(s):  
Bacillus Thuringiensis ◽  
Population Density ◽  
Gypsy Moth ◽  
Mass Density ◽  
Larval Mortality ◽  
Larval Density ◽  
Egg Mass ◽  
Percent Reduction ◽  
Moth Population ◽  
Oak Trees

Abstract Aerial applications of Bacillus thuringiensis Berliner subsp. kurstaki (74.1 billion international units/ha per application; single and double applications), diflubenzuron [69 g (ai)/ha], and no treatment were evaluated. Treatment effects were estimated from frass collections, defoliation, counts of pupae under burlap, and egg-mass counts. Estimates of larval density in the canopy 20 days after treatment ranged from 318.3 to 55.5 larvae per m² in the control- and diflubenzuron-treated plots, respectively. Larval density was reduced in all treatments, and was lowest in the plots treated with diflubenzuron and two applications of B. thuringiensis. Population density rapidly declined in the control plots, and by June 20, when larvae were predominantly in the fifth and sixth instars, no significant differences in larval density were detected among the treatments. Significantly less defoliation occurred to oak trees in the treated plots, but no differences were detected among the spray treatments. Counts of pupae under burlap, postseason egg-mass counts, and percent reduction in egg-mass density did not differ significantly among treatments or versus controls. These results suggest that diflubenzuron and double B. thuringiensis treatments caused higher levels of larval mortality than occurred with a single B. thuringiensis application, but that with a naturally declining gypsy moth population the final levels of damage were the same under all treatments. North. J. Appl. 14(3):135-140.

scholarly journals Efficacy and speed of action of selected plant protection products on Lymantria dispar in laboratory conditions

2017 ◽  
Vol 18 ◽  
pp. 62 ◽  
Author(s):  
Z.D. Zartaloudis ◽  
M.D. Kalapanida ◽  
E.I. Navrozidis
Keyword(s):  
Bacillus Thuringiensis ◽  
Gypsy Moth ◽  
Lymantria Dispar ◽  
Plant Protection ◽  
Plant Protection Products ◽  
The Other ◽  
Larval Instars ◽  
Laboratory Conditions ◽  
Bacillus Thuringiensis Subsp

In this study some selected insecticides were evaluated for their effect on gypsy moth Lymantria dispar L., (Lepidoptera: Lymantriidae) under laboratory conditions. Diflubenzuron, methoxyfenozide, triflumuron, fenoxycarb, fenoxycarb + lufenuron, Bacillus thuringiensis 50% subsp. kurstaki + Bacillus thuringiensis 50% subsp. aizawai, Bacillus thuringiensis subsp. aizawai and spinosad were used in the recommended concentration, against the 1st, 2nd, 3rd and 4th larval instars of L. dispar. The effectiveness of the above insecticides as well as the speed of action (LTime50 and LTime90) expressed in days, were examined in detail. Spinosad and methoxyfenozide presents a relatively higher speed of action in relation to the other insecticides. LTime50 of spinosad and methoxyfenozide did not differ significantly among the first three larval instars and ranged from 0 to 0.61 and 1.13 to 1.74 days, respectively. Regarding IGRs, the mixture (fenoxycarb + lufenuron) and triflumuron were the most effective in relation to the other IGRs tested. Moreover, Bacillus thuringiensis toxins were effective only against the first two larval instars.

scholarly journals Spiders and Carabid beetles as the elements of arthropod’s diversity in ecosystems of Lva-Stvyga inter-river area (Rivne province, Ukraine)

2020 ◽  
pp. 89-100
Author(s):  
A. Hirna ◽  
◽  
Yu. Kanarsky ◽  
V. Yavornytsky ◽  
◽  
...  
Keyword(s):  
Ground Beetles ◽  
Carabid Beetles ◽  
Peat Bog ◽  
Pitfall Traps ◽  
The European Union ◽  
Ecological Features ◽  
Composition And Structure ◽  
Oligotrophic Ecosystems ◽  
First Time ◽  
Species Composition And Structure

The series of epigeibiontic Arthropoda communities are investigated in several fo­rest and woodland ecosystems of Lva-Stvyga inter-river area within Volyn Polissia region of Ukraine. This is remoted district with peculiar ecological features as well as dominancy of oligotrophic forest and peat-bog ecosystems. The material of epigeibiontic arthropods was collected in spring and summer 2015 by the method of Barber’s pitfall traps. There are three pilot areas explored: 1) wet oligotrophic pine woodland (Ledo-Pinion); 2) late secondary succession of wet oligotrophic pine woodland cutting area; 3) dry oligotrophic pine woodland on the sands (Dicrano-Pinion). In total, 186 species of epigeibiontic arthropods were explored. There were found 75 species of spiders (Araneae) and 27 species of ground beetles (Coleoptera, Carabidae) among them. Along with that, the ants (Formicidae) have dominancy within related communities with an amount about 82–87 % of total arthropod individual’s number, and Araneae both with Carabidae exceed 6–7 % of this number. Nevertheless, there are nine spider species found for the first time for Ukrainian Polissia region and 1 species – Gnaphosa nigerrima – for the territory of Ukraine. One Carabid beetle species (Cymindis vaporariorum) was found at the first time for West Polissia region of Ukraine. There is also a number of rare and less known Araneae and Carabidae species found. Thus, the species composition and structure of explored Araneae & Carabidae communities show many specific features, which are caused by characteristic ecological and biogeographical peculiarities of oligotrophic ecosystems within investigated area. Following research of related taxonomical groups has to be directed to the wider spectrum of ecosystems covering, especially to peat-bog and mire complexes as unique protected habitats in Ukraine and the European Union.

scholarly journals Transcriptome of the Lymantria dispar (Gypsy Moth) Larval Midgut in Response to Infection by Bacillus thuringiensis

PLoS ONE ◽  
2013 ◽  
Vol 8 (5) ◽  
pp. e61190 ◽  
Author(s):  
Michael E. Sparks ◽  
Michael B. Blackburn ◽  
Daniel Kuhar ◽  
Dawn E. Gundersen-Rindal
Keyword(s):  
Bacillus Thuringiensis ◽  
Gypsy Moth ◽  
Lymantria Dispar ◽  
Larval Midgut
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