A survey of the parasitic Hymenoptera of larch casebearer in Minnesota

2016 ◽  
Author(s):  
Allastacia K. Gebauer
Keyword(s):  
Parasitic Hymenoptera

Parasitic and Predacious Agents Affecting the Hippelates pusio Complex in Jamaica and Trinidad

1966 ◽  
Vol 98 (1) ◽  
pp. 28-33 ◽  
Author(s):  
E. F. Legner ◽  
E. C. Bay ◽  
T. H. Farr
Keyword(s):  
Natural Enemies ◽  
Larval Parasite ◽  
Predominant Species ◽  
Parasitic Hymenoptera

AbstractA search for natural enemies of Hippelates eye gnats in Jamaica and Trinidad in 1963 resulted in the discovery of four pupal parasites, Trichopria nov. sp., Spalcmgia drosophilae Ashmead, a species of Spalangia and Encyrtidae, and one larval parasite, Trybliographa nov. sp., in Jamaica. What were probably phoretic mites of the Acaridiae infested up to 6.1 per cent of the adult populations in Jamaica. No parasitic Hymenoptera were found attacking Hippelates in Trinidad. Parasitization in Jamaica sometimes approached 40 per cent, but overall parasitization with all host exposures considered did not exceed 2.5 per cent. The effect of predators on naturally breeding Hippelates populations in both Jamaica and Trinidad seemed highly significant, and predominant species are listed.

Sex Determination and Sex Ratio Patterns in Parasitic Hymenoptera

1993 ◽  
pp. 442-476 ◽  
Author(s):  
Robert F. Luck ◽  
Richard Stouthamer ◽  
Leonard P. Nunney
Keyword(s):  
Sex Ratio ◽  
Sex Determination ◽  
Parasitic Hymenoptera

scholarly journals Effects of Abiotic Factors on HIPV-Mediated Interactions between Plants and Parasitoids

2015 ◽  
Vol 2015 ◽  
pp. 1-18 ◽  
Author(s):  
Christine Becker ◽  
Nicolas Desneux ◽  
Lucie Monticelli ◽  
Xavier Fernandez ◽  
Thomas Michel ◽  
...  
Keyword(s):  
Plant Volatiles ◽  
Global Climate ◽  
Abiotic Factors ◽  
Biotic Interactions ◽  
Green Leaf Volatiles ◽  
Limited Attention ◽  
Emission Rates ◽  
Leaf Volatiles ◽  
Parasitic Hymenoptera ◽  
Growing Conditions

In contrast to constitutively emitted plant volatiles (PV), herbivore-induced plant volatiles (HIPV) are specifically emitted by plants when afflicted with herbivores. HIPV can be perceived by parasitoids and predators which parasitize or prey on the respective herbivores, including parasitic hymenoptera. HIPV act as signals and facilitate host/prey detection. They comprise a blend of compounds: main constituents are terpenoids and “green leaf volatiles.” Constitutive emission of PV is well known to be influenced by abiotic factors like temperature, light intensity, water, and nutrient availability. HIPV share biosynthetic pathways with constitutively emitted PV and might therefore likewise be affected by abiotic conditions. However, the effects of abiotic factors on HIPV-mediated biotic interactions have received only limited attention to date. HIPV being influenced by the plant’s growing conditions could have major implications for pest management. Quantitative and qualitative changes in HIPV blends may improve or impair biocontrol. Enhanced emission of HIPV may attract a larger number of natural enemies. Reduced emission rates or altered compositions, however, may render blends imperceptible to parasitoides and predators. Predicting the outcome of these changes is highly important for food production and for ecosystems affected by global climate change.

scholarly journals Primary parasitoid and hyperparasitoid guilds (hymenoptera) of grain aphid (Sitobion avenae F.) in northern Poland

2014 ◽  
Vol 66 (3) ◽  
pp. 1141-1148 ◽  
Author(s):  
T. Barczak ◽  
A. Dębek-Jankowska ◽  
J. Bennewicz
Keyword(s):  
Winter Wheat ◽  
Sitobion Avenae ◽  
Aphidius Ervi ◽  
Primary Parasitoid ◽  
Parasitic Hymenoptera ◽  
Grain Aphid ◽  
Northern Poland

The aim of this study was to determine and compare the guilds of parasitic Hymenoptera associated with the grain aphid on rye and winter wheat. Of the seven species of primary parasitoids (Braconidae: Aphidiinae, Aphelinidae), parasitizing colonies of Sitobion avenae, the most numerous and most frequently occurring, included Praon volucre, Aphidius ervi and Aphidius uzbekistanicus. Primary parasitoids of grain aphids were eliminated largely by hyperparasitoids, mostly of the families Megaspilidae (Dendrocerus carpenteri), Figitidae-Alloxystini (Alloxysta spp. and Phaenoglyphis villosa) and Pteromalidae (Pachyneuron aphidis, Asaphes vulgaris, Coruna clavata), but D. carpenteri and Alloxysta spp. belonged to dominants and subdominants, respectively.

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