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Effect of triflumuron on two species of nitidulid beetles, Carpophilus hemipterus and Urophorus humeralis
Year:
1985
Source of publication :
Phytoparasitica
Authors :
Blumberg, Daniel
;
.
Volume :
13
Co-Authors:
Blumberg, D., Dept. of Entomology, ARO, The Volcani Center, Bet Dagan, Israel
Doron, S., Regional High School, Gedera, Israel
Bitton, S., Extension Service, Israel Ministry of Agriculture, Bet She'an, Israel
Facilitators :
From page:
9
To page:
19
(
Total pages:
11
)
Abstract:
Egg hatch of two nitidulids, Carpophilus hemipterus L. and Urophorus humeralis F., was affected by the chitin synthesis inhibitor triflumuron (Alsystin; BAY SIR 8514)via the adult stage of the beetle. This occurred by exposure to treated diets, by a brief dip of the adults in aqueous dilutions of the toxicant, or by contact with a treated plastic netting cage. Exposure of adults of C. hemipterus for 24 h to 0.0125%, 0.00125%, 0.00025% or 0.000125% and of U. humeralis to 0.0125% a.i.-treated diets completely prevented hatch of eggs laid during the subsequent 48 h on an untreated diet. Although at first sterile eggs were obtained with adults of either nitidulid species transferred to an untreated diet after 24 h exposure to the 0.0125%-treated diet, egg viability gradually recovered. The speed of recovery and the course of mortality of larvae that hatched from eggs laid by treated adults, indicated that C. hemipterus was more susceptible than U. humeralis to triflumuron. Dipping C. hemipterus adults - males or females - in 0.0125% a.i. triflumuron also resulted in complete prevention of egg hatch. Similar results were obtained by a 1-h contact of adults with treated cages. Triflumuron had no direct ovicidal activity against the two species at the concentrations used but was very effective against larvae of both species. At 0.0125% a.i., 3-5-mm-long larvae of U. humeralis were more tolerant than newly hatched larvae and than 3-5-mm-long larvae of C. hemipterus. Application of 0.0125% a.i. triflumuron in a date palm grove did not prevent fruit infestation by nitidulid adults but, due to prevention of egg hatch, almost no larval development was observed. © 1985 Springer Science + Business Media B.V.
Note:
Related Files :
Alsystin
BAY SIR 8514
Carpophilus hemipterus
chitin synthesis inhibitors
Nitidulidae
Triflumuron
Urophorus humeralis
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Related Content
More details
DOI :
10.1007/BF02994433
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
30032
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:51
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Scientific Publication
Effect of triflumuron on two species of nitidulid beetles, Carpophilus hemipterus and Urophorus humeralis
13
Blumberg, D., Dept. of Entomology, ARO, The Volcani Center, Bet Dagan, Israel
Doron, S., Regional High School, Gedera, Israel
Bitton, S., Extension Service, Israel Ministry of Agriculture, Bet She'an, Israel
Effect of triflumuron on two species of nitidulid beetles, Carpophilus hemipterus and Urophorus humeralis
Egg hatch of two nitidulids, Carpophilus hemipterus L. and Urophorus humeralis F., was affected by the chitin synthesis inhibitor triflumuron (Alsystin; BAY SIR 8514)via the adult stage of the beetle. This occurred by exposure to treated diets, by a brief dip of the adults in aqueous dilutions of the toxicant, or by contact with a treated plastic netting cage. Exposure of adults of C. hemipterus for 24 h to 0.0125%, 0.00125%, 0.00025% or 0.000125% and of U. humeralis to 0.0125% a.i.-treated diets completely prevented hatch of eggs laid during the subsequent 48 h on an untreated diet. Although at first sterile eggs were obtained with adults of either nitidulid species transferred to an untreated diet after 24 h exposure to the 0.0125%-treated diet, egg viability gradually recovered. The speed of recovery and the course of mortality of larvae that hatched from eggs laid by treated adults, indicated that C. hemipterus was more susceptible than U. humeralis to triflumuron. Dipping C. hemipterus adults - males or females - in 0.0125% a.i. triflumuron also resulted in complete prevention of egg hatch. Similar results were obtained by a 1-h contact of adults with treated cages. Triflumuron had no direct ovicidal activity against the two species at the concentrations used but was very effective against larvae of both species. At 0.0125% a.i., 3-5-mm-long larvae of U. humeralis were more tolerant than newly hatched larvae and than 3-5-mm-long larvae of C. hemipterus. Application of 0.0125% a.i. triflumuron in a date palm grove did not prevent fruit infestation by nitidulid adults but, due to prevention of egg hatch, almost no larval development was observed. © 1985 Springer Science + Business Media B.V.
Scientific Publication
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