| 27 matches found in 19 documents. Search time: 0.69 seconds. |
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Score: 4.00 |
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| Title: Effects of Prior Experience on Host Selection and Host Utilization by Two Populations of Anisopteromalus calandrae ( Hymenoptera : Pteromalidae ) .
| | Author: Ghimire MN Phillips TW | | Journal: Environ Entomol Citation: V : 37 P : 1300-1306 Year: 2008 Type: Publisher | | Literature: oryza Field: abstract Doc ID: pub19036210 Accession (PMID): 19036210 | | Abstract: The effect of adult learning through an oviposition and host feeding experience was studied in two populations of Anisopteromalus calandrae ( Hymenoptera : Pteromalidae ) , in choice and no-choice experiments in the laboratory using last instars of rice weevil , Sitophilus oryzae L , and lesser grain borer , Rhyzopertha dominica ( F ) , as hosts .
In choice experiments , 20 wheat kernels infested by rice weevil and 20 by lesser grain borer were placed randomly in petri dish ( 15 by 100 mm ) arenas .
In no-choice experiments , 10 host-infested wheat kernels , either with rice weevils or with lesser grain borers , were mixed thoroughly in 500 g of uninfested wheat placed in a 0 . 945-liter glass jar ( 75 by 170 mm ) arenas .
A calandrae females from a laboratory and field populations that were experienced with host larvae or naive were introduced singly into each experimental arena and allowed to sting and oviposit for 24 h .
An oviposition experience with rice weevil or lesser grain borer had a stronger effect on host preference in choice experiments compared with experiments with naive wasps .
Host-finding and parasitism rates were increased by prior experience with rice weevils in no-choice experiments .
A calandrae females clearly preferred rice weevil larvae for parasitization over larvae of lesser grain borer regardless of parasitoid population or prior experience .
Also , A calandrae females chose rice weevil larvae for producing female progeny and lesser grain borer for male progeny in choice experiments .
The implications of the results of this study are discussed in relation to host preference and the selection of parasitoid populations for biological control programs in stored grains .
| Matching Sentences:
[ Sen. 1, subscore: 1.00 ]: The effect of adult learning through an oviposition and host feeding experience was studied in two populations of Anisopteromalus calandrae ( Hymenoptera : Pteromalidae ) , in choice and no-choice experiments in the laboratory using last instars of rice weevil , Sitophilus oryzae L , and lesser grain borer , Rhyzopertha dominica ( F ) , as hosts .
[ Sen. 4, subscore: 1.00 ]: A calandrae females from a laboratory and field populations that were experienced with host larvae or naive were introduced singly into each experimental arena and allowed to sting and oviposit for 24 h .
[ Sen. 7, subscore: 1.00 ]: A calandrae females clearly preferred rice weevil larvae for parasitization over larvae of lesser grain borer regardless of parasitoid population or prior experience .
[ Sen. 8, subscore: 1.00 ]: Also , A calandrae females chose rice weevil larvae for producing female progeny and lesser grain borer for male progeny in choice experiments .
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Score: 2.00 |
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| Title: Suitability of five species of stored-product insects as hosts for development and reproduction of the parasitoid Anisopteromalus calandrae ( Hymenoptera : Pteromalidae ) .
| | Author: Ghimire MN Phillips TW | | Journal: J Econ Entomol Citation: V : 100 P : 1732-9 Year: 2007 Type: MEDLINE | | Literature: oryza Field: abstract Doc ID: pub17972654 Accession (PMID): 17972654 | | Abstract: We investigated the ability of two populations of Anisopteromalus calandrae ( Hymenoptera : Pteromalidae ) , to parasitize and develop on late instars of five different stored-product insects that typically complete their development inside seeds of grain or legume species or other dry commodity .
The host species were the cigarette beetle , Lasioderma serricorne ( F ) ; cowpea weevil , Callosobruchus maculatus ( F ) ; rice weevil , Sitophilus oryzae ( L ) ; lesser grain borer , Rhyzopertha dominica ( F ) ; and Angoumois grain moth , Sitotroga cerealella ( Olivier ) .
Experiments were conducted in the laboratory in a no-choice design by using petri dishes ( 15 by 100 mm ) as experimental arenas with 20 host larvae .
A calandrae females from populations originating in Georgia ( GA ) and Oklahoma ( OK ) were introduced singly into experimental arenas and allowed to sting and oviposit for 24 h .
Parasitism by the OK population was greater than that for the GA population across all hosts .
However , no or very low parasitism was found on Angoumois grain moth for either population in this experiment .
The highest number of parasitoid progeny was recorded on cowpea weevil ( 15 . 9 ) followed by rice weevil ( 11 . 5 ) and cigarette beetle ( 10 . 8 ) for the OK population .
A similar trend was observed in the GA population .
The highest proportion of female progeny was produced on cowpea weevil ( 73 . 0% ) by the OK population .
Conversely , a higher proportion of female progeny was produced on rice weevil ( 64 . 6% ) by the GA population than produced by the OK population .
Parasitoid adults were significantly larger and heavier when they developed on cowpea weevil irrespective of parasitoid population .
The possible application of these results for biological control of stored-product insects is discussed .
| Matching Sentences:
[ Sen. 1, subscore: 1.00 ]: We investigated the ability of two populations of Anisopteromalus calandrae ( Hymenoptera : Pteromalidae ) , to parasitize and develop on late instars of five different stored-product insects that typically complete their development inside seeds of grain or legume species or other dry commodity .
[ Sen. 4, subscore: 1.00 ]: A calandrae females from populations originating in Georgia ( GA ) and Oklahoma ( OK ) were introduced singly into experimental arenas and allowed to sting and oviposit for 24 h .
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Score: 2.00 |
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| Title: Effects of biological control of rice weevil by Anisopteromalus calandrae with a population of two Aspergillus spp .
| | Author: Yoon EY Nam Y Ryoo MI | | Journal: Environ Entomol Citation: V : 38 P : 121-8 Year: 2009 Type: MEDLINE | | Literature: oryza Field: abstract Doc ID: pub19791605 Accession (PMID): 19791605 | | Abstract: In this study , we assessed the interaction occurring between the rice weevil and two storage molds ( Aspergillus candidus Link and Aspergillus niger Van Tiegem ) that prefer different moisture regimens under rice storage conditions .
Rice weevil induced rapid population growth in both of the storage molds .
The colony forming units ( CFUs ) of A candidus and A niger peaked at 10 ( 9 . 00 +/- 0 . 02 ) and 10 ( 7 . 72 +/- 0 . 03 ) /g , respectively .
All of the rice grains were infested with the molds and eventually deteriorated ; in the jars infested with A candidus , no living weevils were found after 135 d .
Suppression of the rice weevil by its larval parasitoid , Anisopteromalus calandrae ( Howard ) , significantly retarded the growth of A candidus but completely halted the growth of A niger , which was replaced by xerophyllic molds including Aspergillus penicilloides Spegazzini and Wallemia sebi ( Fries ) .
Regression analyses showed that the total number of weevils was a significant factor explaining grain moisture content , which was in turn a significant factor in the growth of both mold species .
The growth of A niger was dependent on the grain moisture content ( r2 = 0 . 52 ) , thereby suggesting that the growth of A niger was caused primarily by activity of the rice weevil and the resulting increased grain moisture content .
However , 27% of the growth of A candidus was explained by grain moisture contents , suggesting that a factor other than the grain moisture content may also affect its growth .
Suppression of rice weevil by A calandrae could induce an A candidus-dominant molds community , which would be a factor for consideration in biological control program .
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[ Sen. 5, subscore: 1.00 ]: Suppression of the rice weevil by its larval parasitoid , Anisopteromalus calandrae ( Howard ) , significantly retarded the growth of A candidus but completely halted the growth of A niger , which was replaced by xerophyllic molds including Aspergillus penicilloides Spegazzini and Wallemia sebi ( Fries ) .
[ Sen. 9, subscore: 1.00 ]: Suppression of rice weevil by A calandrae could induce an A candidus-dominant molds community , which would be a factor for consideration in biological control program .
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Score: 2.00 |
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| Title: Implementation of bio-fungicides and seed treatment in organic rice cv .
KDML 105 farming .
| | Author: Thobunluepop P | | Journal: Pak J Biol Sci Citation: V : 12 P : 1119-26 Year: 2009 Type: MEDLINE | | Literature: oryza Field: abstract Doc ID: pub19899322 Accession (PMID): 19899322 | | Abstract: This study was aimed to evaluate the several chemical compounds of relatively composite structure with antifungal activity from Thai local medical plants .
The antifungal activity of Stemona curtisii HK . f . , Stemona tuberose L , Acorus calamus L , Eugenia caryophyllus , Memmea siamensis Kost and an eugenol active compound were studied in vitro .
Four pathogenic seed borne fungi , Alternaria solani , Colletotrichum sp . , Fusarium moniliforme and Rhizoctonia solani were used as target organisms .
The agar overlay technique and spore inhibition techniques were applied for the determination of their essential oil and active compound antifungal activity at various concentration ; 0 . 10 , 0 . 25 , 0 . 50 and 1 . 00% ( v/v ) and untreated as control ( 0% v/v ) .
Eugenol active compound showed the strongest antifungal activity on all species of tested fungal species .
On the other hand , the antifungal activity of those bio-fungicides was lined up into a series from strong to low , as follows : Eugenia caryophyllus > Acorus calamus Linn .
> Stemona tuberosa L > Stemona curtisii Hk . f , while Mammea siamensis Kost could not control any fungal species .
Moreover , after eugenol application , lysis of spore and inhibition of mycelium growth were detected .
Microscopic analysis exhibited complete lysis of spores after 24 h at a concentration of 1 . 00% v/v .
Moreover , at the same concentration and 96 h incubation the mycelia growth was completely inhibited .
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[ Sen. 2, subscore: 1.00 ]: The antifungal activity of Stemona curtisii HK . f . , Stemona tuberose L , Acorus calamus L , Eugenia caryophyllus , Memmea siamensis Kost and an eugenol active compound were studied in vitro .
[ Sen. 6, subscore: 1.00 ]: On the other hand , the antifungal activity of those bio-fungicides was lined up into a series from strong to low , as follows : Eugenia caryophyllus > Acorus calamus Linn .
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Score: 2.00 |
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| Title: Biological control of indianmeal moth and rice weevil by parasitoids with reference to the intraspecific competition pattern .
| | Author: Nam Y Ji J Na JH Chun YS Ryoo MI | | Journal: J Econ Entomol Citation: V : 104 P : 693-701 Year: 2011 Type: MEDLINE | | Literature: oryza Field: abstract Doc ID: pub21510223 Accession (PMID): 21510223 | | Abstract: Biological control of rice weevil , Sitophilus oryzae ( L ) , and Indianmeal moth , Plodia interpunctella ( Hubner ) , by their parasitoids Anisopteromalus calandrae ( Howard ) and Bracon hebetor Say was examined while considering the intraspecific competition pattern of the pests .
In both experimental and simulation studies , A calandrae was shown to suppress the rice weevil population , a contest type competitor , regardless of the parasitoid/weevil ratios tested .
In contrast , B hebetor only significantly suppressed the Indianmeal moth , a scramble type competitor , when the parasitoid/moth ratio was >0 . 05 .
At ratios lower than 0 . 05 , the role of B hebetor was negligible , and the correlation coefficients between the number of moths that had emerged and the parasitoid/moth ratio was estimated to be 0 . 07 .
The control efficiency of the two parasitoids with respect to the parasitoid/host ratio was estimated using a ratio-response model .
To suppress the weevil density to a level that was only 10% of the current density , the ratio was estimated to be 0 . 02 , whereas this value was 0 . 14 for the Indianmeal moth .
However , for the continuous suppression of the Indianmeal moth , periodic and iterative introduction of B hebetor was required .
| Matching Sentences:
[ Sen. 1, subscore: 1.00 ]: Biological control of rice weevil , Sitophilus oryzae ( L ) , and Indianmeal moth , Plodia interpunctella ( Hubner ) , by their parasitoids Anisopteromalus calandrae ( Howard ) and Bracon hebetor Say was examined while considering the intraspecific competition pattern of the pests .
[ Sen. 2, subscore: 1.00 ]: In both experimental and simulation studies , A calandrae was shown to suppress the rice weevil population , a contest type competitor , regardless of the parasitoid/weevil ratios tested .
| | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
