Effect of Bacillus thuringiensis Toxins on the Midgut of the Nun Moth Lymantria monacha

2000 ◽  
Vol 75 (4) ◽  
pp. 288-291 ◽  
Author(s):  
C Rausell ◽  
N De Decker ◽  
I Garcı́a-Robles ◽  
B Escriche ◽  
E Van Kerkhove ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Lymantria Monacha ◽  
Nun Moth

Artifical diets and rearing of the nun moth, Lymantria monacha

1987 ◽  
Vol 45 (3) ◽  
pp. 219-225 ◽  
Author(s):  
P. Grijpma ◽  
J. J. M. Belde ◽  
D. C. Werf
Keyword(s):  
Lymantria Monacha ◽  
Nun Moth

scholarly journals A Binding Site for Bacillus thuringiensis Cry1Ab Toxin Is Lost during Larval Development in Two Forest Pests

2000 ◽  
Vol 66 (4) ◽  
pp. 1553-1558 ◽  
Author(s):  
Carolina Rausell ◽  
Amparo Consuelo Martínez-Ramírez ◽  
Inmaculada García-Robles ◽  
María Dolores Real
Keyword(s):  
Bacillus Thuringiensis ◽  
Larval Development ◽  
Binding Sites ◽  
Specific Binding ◽  
Membrane Vesicles ◽  
Thaumetopoea Pityocampa ◽  
Binding Assays ◽  
Forest Pests ◽  
First Instar ◽  
Nun Moth

ABSTRACT The insecticidal activity and receptor binding properties ofBacillus thuringiensis Cry1A toxins towards the forest pests Thaumetopoea pityocampa (processionary moth) andLymantria monacha (nun moth) were investigated. Cry1Aa, Cry1Ab, and Cry1Ac were highly toxic (corresponding 50% lethal concentration values: 956, 895, and 379 pg/μl, respectively) to first-instar T. pityocampa larvae. During larval development, Cry1Ab and Cry1Ac toxicity decreased with increasing age, although the loss of activity was more pronounced for Cry1Ab. Binding assays with 125I-labelled Cry1Ab and brush border membrane vesicles from T. pityocampa first- and last-instar larvae detected a remarkable decrease in the overall Cry1Ab binding affinity in last-instar larvae, although saturable Cry1Ab binding to both instars was observed. Homologous competition experiments demonstrated the loss of one of the two Cry1Ab high-affinity binding sites detected in first-instar larvae. Growth inhibition assays with sublethal doses of Cry1Aa, Cry1Ab, and Cry1Ac in L. monacha showed that all three toxins were able to delay molting from second instar to third instar. Specific saturable binding of Cry1Ab was detected only in first- and second-instar larvae. Cry1Ab binding was not detected in last-instar larvae, although specific binding of Cry1Aa and Cry1Ac was observed. These results demonstrate a loss of Cry1Ab binding sites during development on the midgut epithelium of T. pityocampa and L. monacha, correlating in T. pityocampa with a decrease in Cry1Ab toxicity with increasing age.

Towards pheromone-based monitoring of nun moth, Lymantria monacha (L.) (Lep., Lymantriidae) populations

2000 ◽  
Vol 124 (2) ◽  
pp. 77-85 ◽  
Author(s):  
P. Morewood ◽  
G. Gries ◽  
J. Liska ◽  
P. Kapitola ◽  
D. Haussler ◽  
...  
Keyword(s):  
Lymantria Monacha ◽  
Nun Moth

Evaluation of pheromone catches of the nun moth, Lymantria monacha L.

2009 ◽  
Vol 98 (1-5) ◽  
pp. 399-413 ◽  
Author(s):  
T. Secher Jensen ◽  
B. Overgaard Nielsen
Keyword(s):  
Lymantria Monacha ◽  
Nun Moth

scholarly journals Synthesis of disparlure and monachalure enantiomers from 2,3-butanediacetals

2020 ◽  
Vol 16 ◽  
pp. 616-620
Author(s):  
Adam Drop ◽  
Hubert Wojtasek ◽  
Bożena Frąckowiak-Wojtasek
Keyword(s):  
Gypsy Moth ◽  
Lymantria Dispar ◽  
Sex Pheromones ◽  
Stereoselective Synthesis ◽  
Starting Material ◽  
Lymantria Monacha ◽  
Nun Moth

2,3-Butanediacetal derivatives were used for the stereoselective synthesis of unsymmetrically substituted cis-epoxides. The procedure was applied for the preparation of both enantiomers of disparlure and monachalure, the components of the sex pheromones of the gypsy moth (Lymantria dispar) and the nun moth (Lymantria monacha) using methyl (2S,3R,5R,6R)-3-ethylsulfanylcarbonyl-5,6-dimethoxy-5,6-dimethyl-1,4-dioxane-2-carboxylate as the starting material.

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