Astegopteryx spinocephala (Hemiptera: Aphididae), a new aphid species producing sterile soldiers that guard eggs laid in their gall

2006 ◽  
Vol 9 (2) ◽  
pp. 181-190 ◽  
Author(s):  
Utako KUROSU ◽  
Sawai BURANAPANICHPAN ◽  
Shigeyuki AOKI
Keyword(s):  
Aphid Species ◽  
Sterile Soldiers

Influence of five aphid species on development and reproduction of Propylaea japonica (Coleoptera: Coccinellidae)

2012 ◽  
Vol 62 (3) ◽  
pp. 135-139 ◽  
Author(s):  
Shi-Ze Zhang ◽  
Jian-Jun Li ◽  
Hong-Wei Shan ◽  
Fan Zhang ◽  
Tong-Xian Liu
Keyword(s):  
Aphid Species

scholarly journals Hymenopteran Parasitoids of Aphid Pests within Australian Grain Production Landscapes

Insects ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 44
Author(s):  
Samantha E. Ward ◽  
Paul A. Umina ◽  
Sarina Macfadyen ◽  
Ary A. Hoffmann
Keyword(s):  
Aphid Species ◽  
Crop Growth ◽  
Diaeretiella Rapae ◽  
Field Variation ◽  
Grain Crops ◽  
Growing Seasons ◽  
Crop Type ◽  
Eastern Australia ◽  
Crop Growth Stage ◽  
Hymenopteran Parasitoids

In grain crops, aphids are important pests, but they can be suppressed by hymenopteran parasitoids. A challenge in incorporating parasitoids into Integrated Pest Management (IPM) programs, however, is that parasitoid numbers can be low during periods within the season when aphids are most damaging. Understanding the population dynamics of key aphid species and their parasitoids is central to ameliorating this problem. To examine the composition and seasonal trends of both aphid and parasitoid populations in south-eastern Australia, samples were taken throughout the winter growing seasons of 2017 and 2018 in 28 fields of wheat and canola. Myzus persicae (Sulzer) was the most abundant aphid species, particularly within canola crops. Across all fields, aphid populations remained relatively low during the early stages of crop growth and increased as the season progressed. Seasonal patterns were consistent across sites, due to climate, crop growth stage, and interactions between these factors. For canola, field edges did not appear to act as reservoirs for either aphids or parasitoids, as there was little overlap in the community composition of either, but for wheat there was much similarity. This is likely due to the presence of similar host plants within field edges and the neighbouring crop, enabling the same aphid species to persist within both areas. Diaeretiella rapae (M’Intosh) was the most common parasitoid across our study, particularly in canola, yet was present only in low abundance at field edges. The most common parasitoid in wheat fields was Aphidius matricariae (Haliday), with field edges likely acting as a reservoir for this species. Secondary parasitoid numbers were consistently low across our study. Differences in parasitoid species composition are discussed in relation to crop type, inter-field variation, and aphid host. The results highlight potential focal management areas and parasitoids that could help control aphid pests within grain crops.

scholarly journals Genetic Diversity and Potential Vectors and Reservoirs of Cucurbit aphid-borne yellows virus in Southeastern Spain

2013 ◽  
Vol 103 (11) ◽  
pp. 1188-1197 ◽  
Author(s):  
Mona A. Kassem ◽  
Miguel Juarez ◽  
Pedro Gómez ◽  
Carmen M. Mengual ◽  
Raquel N. Sempere ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Aphis Gossypii ◽  
Purifying Selection ◽  
Aphid Species ◽  
Open Reading Frames ◽  
Weed Species ◽  
Nucleotide Substitutions ◽  
Multiple Introductions ◽  
Spatial And Temporal Scales ◽  
Southeastern Spain

The genetic variability of a Cucurbit aphid-borne yellows virus (CABYV) (genus Polerovirus, family Luteoviridae) population was evaluated by determining the nucleotide sequences of two genomic regions of CABYV isolates collected in open-field melon and squash crops during three consecutive years in Murcia (southeastern Spain). A phylogenetic analysis showed the existence of two major clades. The sequences did not cluster according to host, year, or locality of collection, and nucleotide similarities among isolates were 97 to 100 and 94 to 97% within and between clades, respectively. The ratio of nonsynonymous to synonymous nucleotide substitutions reflected that all open reading frames have been under purifying selection. Estimates of the population's genetic diversity were of the same magnitude as those previously reported for other plant virus populations sampled at larger spatial and temporal scales, suggesting either the presence of CABYV in the surveyed area long before it was first described, multiple introductions, or a particularly rapid diversification. We also determined the full-length sequences of three isolates, identifying the occurrence and location of recombination events along the CABYV genome. Furthermore, our field surveys indicated that Aphis gossypii was the major vector species of CABYV and the most abundant aphid species colonizing melon fields in the Murcia (Spain) region. Our surveys also suggested the importance of the weed species Ecballium elaterium as an alternative host and potential virus reservoir.

STUDY REGARDING THE APHIDOFAGOUS FAUNA STRUCTURE IN THE PEACH ORCHARDS FROM CONSTANTA COUNTY IN 2020

2020 ◽  
Vol 13 ◽  
pp. 110-114
Author(s):  
Andrei Chiriloaie-Palade ◽  
Mădălina Radulea ◽  
Gheorghe Lămureanu ◽  
Ștefan Ion Mocanu ◽  
Maria Iamandei
Keyword(s):  
Myzus Persicae ◽  
Management System ◽  
Green Peach Aphid ◽  
Aphid Species ◽  
Insect Species ◽  
Essential Component ◽  
Intensive Use ◽  
Predatory Insect ◽  
Predatory Insects ◽  
Aphid Populations

"The cosmopolitan aphid species Myzus persicae is a key pest of peach orchards in south and southeastern Romania. The phenomenon of resistance induced by the intensive use of insecticides is a matter of concern for farmers and protectionists, making necessary integrated measure for the control of this pest. Conservation of natural enemy’s populations is an essential component of any management system proposed for pest aphids. The aim of the study was to determine the structure of predatory insects associated with Myzus persicae populations in peach orchards. The research was carried out in three orchards from two localities from Constanta County, in peach plantations with Springcrest variety aged 7, 11 and 12 years. As a result of this study, there were determined a total of 15 predatory insect species belonging to eight systematic families: Coccinellidae, Chrysopidae, Hemerobiidae, Syrphydae, Cecidomyiidae, Panorpidae, Nabidae and Forficulidae, which naturally contribute to the reduction of the green peach aphid populations. "

Taxonomic notes on some aphid species of the subtribe Anuraphidina (Homoptera: Aphididae)

2007 ◽  
Vol 16 (2) ◽  
pp. 223-224
Author(s):  
A.V. Stekolshchikov
Keyword(s):  
Aphid Species ◽  
New Combinations

New synonymies: Brachycaudus subgenus Mordvilkomemor Shaposhnikov, 1950 = Scythaphis Kadyrbekov, 2002; Dysaphis (Pomaphis) plantaginea (Passerini, 1860) = Dysaphis rotalis Zhang, Chen, Zhong & Li, 1999. New combinations: Brachycaudus (Mordvilkomemor) eurotiae (Mamontova, 1968) for Scythaphis eurotiae; Protaphis flaviovis (Zhang, Chen, Zhong & Li, 1999) for Dysaphis flaviovis.

Drought stress increases the expression of barley defence genes with negative consequences for infesting cereal aphids

2021 ◽  
Author(s):  
Daniel Leybourne ◽  
Tracy Valentine ◽  
Kirsty Binnie ◽  
Anna Taylor ◽  
Alison Jane Karley ◽  
...  
Keyword(s):  
Drought Stress ◽  
Aphid Species ◽  
Susceptible Variety ◽  
Aphid Resistance ◽  
Herbivorous Insects ◽  
Cereal Aphids ◽  
Negative Consequences ◽  
Resistant Plant ◽  
Negative Effect ◽  
The Impact

Crops are exposed to myriad abiotic and biotic stressors with negative consequences. Two stressors that are expected to increase under climate change are drought and infestation with herbivorous insects, including important aphid species. Expanding our understanding of the impact drought has on the plant-aphid relationship will become increasingly important under future climate scenarios. Here we use a previously characterised plant-aphid system comprising a susceptible variety of barley, a wild relative of barley with partial-aphid resistance, and the bird cherry-oat aphid to examine the drought-plant-aphid relationship. We show that drought has a negative effect on plant physiology and aphid fitness and provide evidence to suggest that plant resistance influences aphid responses to drought stress, with the expression of aphid detoxification genes increasing under drought when feeding on the susceptible plant but decreasing on the partially-resistant plant. Furthermore, we show that the expression of thionin genes, plant defensive compounds that contribute aphid resistance, increase ten-fold in susceptible plants exposed to drought stress but remain at constant levels in the partially-resistant plant, suggesting they play an important role in modulating aphid populations. This study highlights the role of plant defensive processes in mediating the interactions between the environment, plants, and herbivorous insects.

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