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 Review of Aphidiinae parasitoids (Hymenoptera: Braconidae) of the Middle East and North Africa: key to species and host associations

2019 ◽  
Author(s):  
Ehsan Rakhshani ◽  
Hossein Barahoei ◽  
Zubair Ahmad ◽  
Petr Starý ◽  
Mostafa Ghafouri-Moghaddam ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Middle East ◽  
North Africa ◽  
Aphid Species ◽  
Junior Synonym ◽  
Key To Species ◽  
Aphid Parasitoid ◽  
Host Aphid ◽  
New Material ◽  
Host Associations

In this study, a total of 108 Aphidiinae species, belonging to 18 genera, associated with 240 aphid species in 16 countries of the Middle East and North Africa are reviewed. 743 host aphid-parasitoid associations are listed. New material was collected from various regions of Saudi Arabia during 2011–2013. Three species including Aphidius avenae Haliday, 1834, Aphidius platensis Brèthes, 1913 and Praon barbatum Mackauer, 1967 are first recorded for the fauna of this country. Lysiphlebus marismortui Mescheloff & Rosen, 1990 syn. nov. is classified as the junior synonym of Lysiphlebus confusus Tremblay & Eady, 1978. An illustrated up-to-date key to all known species of Aphidiinae that occur in the Middle East and North Africa is provided. The findings are discussed in relation to the overall parasitoid-aphid associations in the target investigated region.

scholarly journals Resistance in advanced cowpea lines to Aphis craccivora Koch, 1854 (Hemiptera: Aphididae)

2019 ◽  
Vol 13 ◽  
pp. 185
Author(s):  
Leandro Carvalho Da Silva ◽  
Daniel Rodrigues Nere ◽  
Antônia Débora Camila de Lima Ferreira ◽  
Ervino Bleicher
Keyword(s):  
Host Plants ◽  
Insect Pests ◽  
Mortality Rates ◽  
Aphis Craccivora ◽  
Total Fecundity ◽  
Cowpea Aphid ◽  
Aphis Craccivora Koch ◽  
Biological Aspects ◽  
New Cultivars

The Brazilian cowpea crop has been increasing in recent years due to the launch of new cultivars. However these are, in some cases, susceptible to cowpea aphid. In view of this, studies of the biology of, one of the main insect pests on advanced cowpea lines, is essential, since they form the next new cultivars to be the released. Accordingly, the objective of the evaluate the main advanced cowpea lines that confer resistance over the biological aspects of Aphis craccivora Koch. Eight advanced cowpea lines were studied, plus cultivar VITA 7 to provide a standard for aphid susceptibility. Number of living individuals, the longevity of insects and number of descendants produced were recorded daily. Highest nymph mortality rates, longest inter-generation intervals and the lowest reproductive duration, occurred when the aphids had lines MNCO4-762F-03 and MNCO4-762F-09 as host plants. Daily fecundity values (3.0 to 8.0 nymphs per day) varied according to lineage. Lowest total fecundity values were recorded when aphids fed on MNCO4-762F-03, MNCO4-762F-09 and MNCO4-792F-123 lines. MNCO4-762F-03 and MNCO4-762F-09 lines negatively impacted A. craccivora biology, and were the least suitable as hosts.

Parasitoid–host relationship between Trioxys (Binodoxys) indicus Subba Rao &Sharma (Hymenoptera: Aphidiidae) and Aphis craccivora Koch (Hemiptera: Aphididae): effect of host plants on the area of discovery of the parasitoid

1985 ◽  
Vol 63 (1) ◽  
pp. 192-195 ◽  
Author(s):  
Arvind Kumar ◽  
C. P. M. Tripathi
Keyword(s):  
Host Plants ◽  
Solanum Melongena ◽  
Host Density ◽  
Mass Rearing ◽  
Behavioural Response ◽  
Aphis Craccivora ◽  
Alternative Host ◽  
K Value ◽  
Dolichos Lablab ◽  
Aphis Craccivora Koch

This paper elucidates the effect of different host plants on the area of discovery of the parasitoid Trioxys (Binodoxys) indicus, which decreases linearly with the increase of parasitoid density. This decrease is minimum in aphids reared on Cajanus cajan followed by those reared on Dolichos lablab and Solanum melongena, but the killing power (k value) increases significantly in all the tested host plants, being maximum in aphids reared on C. cajan followed by those reared on D. lablab and S. melongena. However, when the host density increases, the area of discovery and k value (high in C. cajan aphids followed by D. lablab and S. melongena aphids) increases up to 50 hosts and thereafter decreases. The leaf texture of the host plants and the interference between the parasitoids at higher densities is suggested as a cause for this type of behavioural response which is explained by the population model of M. P. Hassell and G. C. Varley. For the suppression of Aphis craccivora population, it is suggested that the parasitoid and the host ratio may be 1:50 and for the mass rearing of the parasitoid, when C. cajan is not available in the field, D. lablab may be used as an alternative host plant.

Sign in / Sign up

Export Citation Format

Share Document