scholarly journals EFFICACY OF THE APHID PARASITOID DIAERETIELLA RAPAE (M'INTOSH) TO CONTROL BREVICORYNE BRASSICAE L., APHIS CRACCIVORA (KOCH) AND APHIS NERII BOYER AT SHARKIA GOVERNORATE, EGYPT

2013 ◽  
Vol 92 (1) ◽  
pp. 21-31
Author(s):  
AHMED A. SALEH
Keyword(s):  
Brevicoryne Brassicae ◽  
Aphis Craccivora ◽  
Diaeretiella Rapae ◽  
Aphid Parasitoid ◽  
Aphis Nerii ◽  
Aphis Craccivora Koch

Host stage preference and performance of the aphid parasitoid Diaeretiella rapae (Hymenoptera: Braconidae) on Brevicoryne brassicae and Lipaphis pseudobrassicae (Hemiptera: Aphididae)

2016 ◽  
Vol 36 (01) ◽  
pp. 10-21 ◽  
Author(s):  
Sylvia W.R. Khakasa ◽  
Samira A. Mohamed ◽  
Zipporah O. Lagat ◽  
Fathiya M. Khamis ◽  
Chrysantus M. Tanga
Keyword(s):  
Host Species ◽  
Oviposition Preference ◽  
Aphid Species ◽  
Brevicoryne Brassicae ◽  
Diaeretiella Rapae ◽  
Pest Species ◽  
Aphid Parasitoid ◽  
Significant Difference ◽  
Host Stage ◽  
And Performance

We assessed the host stage preference and performance of the aphid parasitoidDiaeretiella rapae(McIntosh) on two aphid species,Brevicoryne brassicae(L.) andLipaphis pseudobrassicae(Davis). Although the parasitoid parasitized all nymphal instars of both aphid species, it showed a higher oviposition preference for 2nd (48.2 ± 7.74%) and 3rd (41.0 ± 7.82%) instars ofL. pseudobrassicae, and for the 3rd (40.0 ± 4.59%) instar ofB. brassicae. Across the host species, there was no significant difference in parasitoid preference between the 3rd and 4th instars, while 1st and 2nd instars ofL. pseudobrassicaewere significantly more preferred than their counterparts (B. brassicae). Days to mummification among different instars of the same host was not significantly different when the parasitoid was reared onB. brassicae, whereas this was highest on the 2nd, 3rd and 4th instars ofL. pseudobrassicae. Number of mummies was also significantly different among the nymphal instars of both host species and between the two host species for the 1st and 2nd instars. In terms of body size, femaleD. rapaereared onL. pseudobrassicaewere significantly larger than those reared onB. brassicae. We discuss the findings in the context of laboratory mass rearing ofD. rapaeand its potential as a biological control agent for both aphid pest species.

scholarly journals Tritrophic associations and taxonomic notes on Lysiphlebus fabarum (Marshall) (Hymenoptera: Braconidae: Aphidiinae), a keystone aphid parasitoid in Iran

2013 ◽  
Vol 65 (2) ◽  
pp. 667-680 ◽  
Author(s):  
Ehsan Rakhshani ◽  
Petr Starý ◽  
Zeljko Tomanovic
Keyword(s):  
Sex Ratio ◽  
Host Plants ◽  
Morphological Characters ◽  
Biological Species ◽  
Aphis Craccivora ◽  
Aphid Parasitoid ◽  
Aphis Craccivora Koch ◽  
Host Aphid ◽  
Host Associations

An investigation of host associations, distribution and types of reproduction (sexual, asexual) of Lysiphlebus fabarum (Marshall) across 20 provinces of Iran during 2006-2011 was undertaken. The parasitoid was reared from three groups of host aphids belonging to genera Aphis and Brachycaudus, and occasional host aphid genera. Aphis craccivora Koch was the most frequent host aphid for L. fabarum on various host plants, including economically important crops. The field sex ratio generally favored females, but in some cases, only thelytokous (uniparental) populations were found. In those cases, the host was always an Aphis species. Specimens reared from Brachycaudus aphids were all biparental, indicating the presence of a sibling biological species. Overall analysis of diagnostic morphological characters in the forewing indicated intra-specific variability in forewing marginal setae as well as variations in length of the R1 vein.

scholarly journals ESTUDIO PRELIMINAR DE LOS AFIDOS (HOMOPTERA-APHIDIDAE) DE IMPORTANCIA AGRICOLA DEL VALLE DE ACNA

2019 ◽  
pp. 16-19
Author(s):  
César Guerra T. ◽  
Rosario Zegarra Zegarra ◽  
Enrique Deza Q.
Keyword(s):  
Brevicoryne Brassicae ◽  
Aphis Craccivora ◽  
Macrosiphum Euphorbiae ◽  
Rhopalosiphum Maidis ◽  
Aphis Craccivora Koch ◽  
Macrosiphum Rosae

Se presentan doce especies de áfidos agrupados en diez géneros, identificados para las condiciones del valle de Tacna, como resultado preliminar del trabajo de investigación, cuyo objetivo es la identificación de las diversas especies de áfidos, sus hospederos y enemigos naturales. En este estudio preliminar se dan datos de colección y se remarca la importancia y comentarios acerca de su presencia y distribución en el valle de Tacna, relacionados con sus hospederos y enemigos naturales. Las especies de áfidos tratados son: Aphis craccivora Koch; A. gassypii Glover; Brevicoryne brassicae Linnaeus; Cariviella aegopodii Scopoli; Cinara strofii Fitch; Hyperomysus lactucae Linnaues; Macrosiphum euphorbiae Thomas; Macrosiphum rosae Linnaeus; Metapolohium dirhodum Walker; Myzaphis rosarum Kaltb; Rhopalosiphum  maidis Fitch; Ureucon sonchi Linnaeus.

Potency of Three Botanical Oils Against the Aphis Craccivora Koch (Homoptera: Aphididae) Nymphs Under Laboratory Conditions

2021 ◽  
Vol 19 (1) ◽  
pp. 139-154
Author(s):  
MA Hossain ◽  
MS Yasmin ◽  
MAA Bachchu ◽  
MA Alim
Keyword(s):  
Treatment Time ◽  
Probit Analysis ◽  
Aphis Craccivora ◽  
Tween 20 ◽  
Laboratory Conditions ◽  
Significant Difference ◽  
Aphis Craccivora Koch ◽  
Insect Mortality ◽  
Oil Repellent ◽  
Swietenia Mahagoni

Botanicals are promising and attractive alternatives for pest management. In the present study, three botanical oils namely neem (Azadirachta indica), karanja (Pongamia pinnata) and mehogony (Swietenia mahagoni) were tested against the nymphs of Aphis craccivora Koch to evaluate the toxic and repellent effects under laboratory conditions (25 ± 5oC, 65-75% RH). Four concentrations (0.5, 1.0, 1.5, and 2.0%) along with control were maintained with distilled water and tween-20 was used as emulsifier. Leaf dipped method were used for insect bioassay. Insect mortality was recorded at 24, 48 and 72 hours after intervals while repellency was carried out at 2 hours after intervals upto 10th hours and the collected data were analyzed through MSTAT-C program. Results indicated that all the tested oils had toxic and repellent effects against the A. craccivora nymphs. Among the tested botanical oils, no significant difference was observed in terms of mortality over treatment time. But significant difference was noticed over level of concentrations exerted by the botanical oils. The average highest mortality (28.62%) was recorded by the application of mehogony oil whereas neem oil showed the lowest mortality (27.21%) against the A. craccivora and the mortality was directly proportional to the level of concentrations and hour after treatment (HAT). Probit analysis showed the lowest LD50 values of mehogony oil which revealed the highest toxic effect against the nymph of bean aphid. The highest repellent effect (77.33%) was found in mehogony oil (repellent class IV) among all the botanical oils applied. On the contrary, neem (57.33%) and karanja (55.00%) oils belonged to the same repellent class that is repellent class II. Although all the tested botanical oils evaluated showed toxic and repellent effects but mehogony oil performed as the best potent oil against the nymphs. We therefore suggested using the mehogony oil for the management of bean aphid. SAARC J. Agric., 19(1): 139-154 (2021)

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