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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Susceptibility of sap beetles (Coleoptera: Nitidulidae) to entomopathogenic nematodes
Year:
1999
Source of publication :
Biocontrol Science and Technology
Authors :
בלומברג, דניאל
;
.
גולדנברג, שמואל
;
.
גלזר, איתמר
;
.
סלמה, ליאורה
;
.
Volume :
9
Co-Authors:
Glazer, I., Department of Nematology, ARO, Volcani Center, Bet Dagan, 50250, Israel
Salame, L., Department of Nematology, ARO, Volcani Center, Bet Dagan, 50250, Israel
Goldenberg, S., Department of Entomology, ARO, Volcani Center, Bet Dagan, 50250, Israel
Blumberg, D., Department of Entomology, ARO, Volcani Center, Bet Dagan, 50250, Israel
Facilitators :
From page:
259
To page:
266
(
Total pages:
8
)
Abstract:
Nitidulid beetles (Coleoptera) are considered to be serious pests of date palms throughout the world. They attack ripe fruit, causing it to rot, and damage is reflected in both reduced yield and lower fruit quality. The present study was aimed at an evaluation of the susceptibility to different sap beetles to entomopathogenic nematodes. We further tested nematode efficacy in pots filled with soil infested by third instar larvae of the two beetle species. In Petri dish assay, mortality levels of Carpophilus humeralis and C. hemipterus exposed to Heterorhabditis sp. IS-5 strain indicated that the latter is less susceptible to nematode infection. Exposure of both sap beetle species to different nematode strains gave moderate levels of mortality (35-65%) with the heterorhabditid strains HP88, IS-5 and IS-25. The IS-12 strain of Heterorhabditis sp. showed poor virulence (<35% mortality) against larvae of C. humeralis as well as larvae and pupae of C. humipterus. The nematode species S. riobrave showed moderate virulence (35-65%) mortality to larvae and pupae of S. humeralis as well as to larvae of C. hemipterus. Exposure of C. hemeralis to different concentrations of Heterorhabditis sp. IS-5 in pots containing soil resulted in high mortality (>65%). In contrast, the lower concentrations (500 and 1000 nematodes/pot) caused low mortality (35%) of C. hemipterus. Other heterorhabditid strains caused 95-100% mortality of C. humeralis in pot assay. The HP88 strain of H. bacteriophora and the Tx strain of Steinernema riobrave showed poor effectiveness. Incubation of different nematode strains with the C. humeralis larvae at high temperature (32°C) resulted in an increase in insect mortality with the IS-12 and 1S-21 strains. Reduced mortality was recorded with the HP88 strain treatment at the higher temperature. The IS-5 and IS-12 strains were equally effective in all three soil types tested, whereas the IS-19 strain was more effective in the Almog type soil than in the others.
Note:
Related Files :
biological control
Carpophilus hemipterus
crop pest
Entomopathogenic nematodes
Nematoda
virulence
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:

Itamar's own PDF.

ID:
28135
Last updated date:
06/11/2022 15:06
Creation date:
17/04/2018 00:36
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Scientific Publication
Susceptibility of sap beetles (Coleoptera: Nitidulidae) to entomopathogenic nematodes
9
Glazer, I., Department of Nematology, ARO, Volcani Center, Bet Dagan, 50250, Israel
Salame, L., Department of Nematology, ARO, Volcani Center, Bet Dagan, 50250, Israel
Goldenberg, S., Department of Entomology, ARO, Volcani Center, Bet Dagan, 50250, Israel
Blumberg, D., Department of Entomology, ARO, Volcani Center, Bet Dagan, 50250, Israel
Susceptibility of sap beetles (Coleoptera: Nitidulidae) to entomopathogenic nematodes
Nitidulid beetles (Coleoptera) are considered to be serious pests of date palms throughout the world. They attack ripe fruit, causing it to rot, and damage is reflected in both reduced yield and lower fruit quality. The present study was aimed at an evaluation of the susceptibility to different sap beetles to entomopathogenic nematodes. We further tested nematode efficacy in pots filled with soil infested by third instar larvae of the two beetle species. In Petri dish assay, mortality levels of Carpophilus humeralis and C. hemipterus exposed to Heterorhabditis sp. IS-5 strain indicated that the latter is less susceptible to nematode infection. Exposure of both sap beetle species to different nematode strains gave moderate levels of mortality (35-65%) with the heterorhabditid strains HP88, IS-5 and IS-25. The IS-12 strain of Heterorhabditis sp. showed poor virulence (<35% mortality) against larvae of C. humeralis as well as larvae and pupae of C. humipterus. The nematode species S. riobrave showed moderate virulence (35-65%) mortality to larvae and pupae of S. humeralis as well as to larvae of C. hemipterus. Exposure of C. hemeralis to different concentrations of Heterorhabditis sp. IS-5 in pots containing soil resulted in high mortality (>65%). In contrast, the lower concentrations (500 and 1000 nematodes/pot) caused low mortality (35%) of C. hemipterus. Other heterorhabditid strains caused 95-100% mortality of C. humeralis in pot assay. The HP88 strain of H. bacteriophora and the Tx strain of Steinernema riobrave showed poor effectiveness. Incubation of different nematode strains with the C. humeralis larvae at high temperature (32°C) resulted in an increase in insect mortality with the IS-12 and 1S-21 strains. Reduced mortality was recorded with the HP88 strain treatment at the higher temperature. The IS-5 and IS-12 strains were equally effective in all three soil types tested, whereas the IS-19 strain was more effective in the Almog type soil than in the others.
Scientific Publication
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