Parasitoid complex of Phyllonorycter robiniella (Clemens, 1859) (Lepidoptera, Gracillariidae) in Serbia

2005 ◽  
Vol 78 (2) ◽  
pp. 109-114 ◽  
Author(s):  
Aleksandar Stojanović ◽  
Čedomir Marković
Keyword(s):  
Parasitoid Complex

Changes in Numbers in the Parasitoid Complex Associated With the Diamond-Back Moth, Plutella Xylostella (L.) (Lepidoptera), in Victoria.

1979 ◽  
Vol 27 (6) ◽  
pp. 981 ◽  
Author(s):  
S Goodwin
Keyword(s):  
High Temperatures ◽  
Plutella Xylostella ◽  
Winter Period ◽  
Parasitoid Species ◽  
Primary Parasitoid ◽  
Parasitoid Complex ◽  
Larval Parasitoids ◽  
Pesticide Treatment ◽  
Drought Conditions ◽  
Rate Of Recovery

Between 1972 and 1974, a study was made of parasitoids of P. xylostella naturally infesting four successive crops of cabbages which had not received any pesticide treatment. Parasitism fluctuated in each crop, averaging 49% during the study. The major parasitoid species were Diadegma cerophaga, Thyraeella collaris and Diadegma rapi, which averaged 93% of parasitism over the study period. Six minor primary parasitoid and one hyperparasite species were also recorded. Parasitoid activity was high during spring and summer, although extremely high temperatures during summer reduced numbers of both the host and its parasitoids. Drought conditions accentuated this. Parasitism in autumn depended upon the severity of this depletion and on the ensuing rate of recovery. The more important larval parasitoids were closely synchronized with host numbers, with a distinct lag during the winter period.

scholarly journals Naturalized Dolichogenidea gelechiidivoris Marsh (Hymenoptera: Braconidae) complement the resident parasitoid complex of Tuta absoluta (Meyrick) (Lepidopera:Gelechiidae) in Spain

2021 ◽  
Author(s):  
Carmen Denis ◽  
JORDI RIUDAVETS ◽  
OSCAR ALOMAR ◽  
NURIA AGUSTI ◽  
HELENA GONZALEZ-VALERO ◽  
...  
Keyword(s):  
Biological Control ◽  
Biocontrol Agent ◽  
Natural Populations ◽  
Tuta Absoluta ◽  
Parasitoid Complex ◽  
Parasitism Rates ◽  
Production Area ◽  
Side Walls ◽  
Predatory Mirid ◽  
First Time

Our study aimed to assess the contribution of natural parasitism due to Necremnus tutae Ribes & Bernardo (Hymenoptera: Eulophidae) to the biological control of Tuta absoluta (Meyrick) (Lepidopera:Gelechiidae) in commercial plots where an IPM program based on the use of predatory mirid bugs was implemented. During the samplings, the presence of another parasitoid was detected and, therefore, a second part of our study intended to identify this species and to evaluate the importance of its natural populations in the biological control of the pest. Leaflets with T. absoluta galleries were collected during 2017-2020 from commercial tomato plots in the horticultural production area of Catalonia (Northeast Spain), including greenhouses, open fields, and roof covered tunnels that lack side walls. In the laboratory, T. absoluta larvae were classified as ectoparasitized, alive, or dead. Reared parasitoids from ectoparasitized larvae were mostly morphologically identified as Necremnus sp. with parasitism rates that peaked in summer months with values between 9 and 15%. Some of these ectoparasitized larvae also yielded another parasitoid identified as Dolichogenidea gelechiidivoris Marsh (Hymenoptera: Braconidae) by both morphological and molecular-DNA barcoding methods. In 2020, parasitism rates due to D. gelechiidivoris that increased with season up to 22%. Our work reports for the first time in Europe the presence of the neotropical species D. gelechiidivoris adding this biocontrol agent to the resident parasitoid complex of T. absoluta in Spain.

scholarly journals Parasitoid complex of Stereonychus fraxini (De Geer) (Coleoptera, Curculionidae) in Serbia

2013 ◽  
Vol 65 (2) ◽  
pp. 733-737
Author(s):  
M. Drekic ◽  
Lj. Mihajlovic ◽  
A. Lozan
Keyword(s):  
Parasitoid Complex ◽  
Hymenopteran Parasitoids

The parasitoid complex of the ash weevil Stereonychus fraxini (De Geer) (Coleoptera, Curculionidae) from 20 localities in Serbia was studied. Forty-one samples of ash weevil larvae and cocoons were analyzed, and the presence of parasitoids was confirmed in 24 samples. Ten species of hymenopteran parasitoids (Hymenoptera Parasitica) were recorded. The two common eulophid wasps, Entedon zanara Walker and Entedon cionobius Thompson, were the most abundant. Parasitoids had an insignificant influence on the level of ash weevil population, because the level of infestation did not exceed 20% in 83% of the samples; however infestation above 40% was determined in 12.2% of the samples, indicating that in some cases parasitoids may significantly reduce the ash weevil population.

scholarly journals LiriomyzaLeafminer (Diptera: Agromyzidae) Parasitoid Complex in Different Agroecological Zones, Seasons, and Host Plants in Kenya

2015 ◽  
Vol 45 (2) ◽  
pp. 357-366 ◽  
Author(s):  
C. N. Foba ◽  
D. Salifu ◽  
Z. O. Lagat ◽  
L. M. Gitonga ◽  
K. S. Akutse ◽  
...  
Keyword(s):  
Host Plants ◽  
Parasitoid Complex ◽  
Agroecological Zones

A survey of the hymenopteran parasitoid complex of Dalmatian toadflax weevils in Colorado

2021 ◽  
pp. 1-7
Author(s):  
Javad Karimzadeh ◽  
Ruth A. Hufbauer ◽  
Boris C. Kondratieff ◽  
Janet G. Hardin ◽  
Andrew P. Norton
Keyword(s):  
Parasitoid Complex ◽  
Dalmatian Toadflax

scholarly journals Changing Host Plants Causes Structural Differences in the Parasitoid Complex of the Monophagous Moth Yponomeuta evonymella, but Does Not Improve Survival Rate

Insects ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 197 ◽  
Author(s):  
Łukowski ◽  
Janek ◽  
Baraniak ◽  
Walczak ◽  
Karolewski
Keyword(s):  
Survival Rate ◽  
Host Plant ◽  
Free Space ◽  
Total Mortality ◽  
Larval Rearing ◽  
Primary Host ◽  
New Host ◽  
Parasitoid Complex ◽  
Significant Difference ◽  
Enemy Free Space

Recently in Poland, cases of host expansion have frequently been observed in the typically monophagous bird-cherry ermine moth (Yponomeuta evonymella), which has moved from its native host plant, bird cherry (Prunus padus), to a new, widely distributed plant that is invasive in Europe, black cherry (P. serotina). We attempted to verify the reasons behind this host change in the context of the enemy-free space hypothesis by focusing on parasitoids attacking larval Y. evonymella on one of three host plant variants: The primary host, P. padus; initially P. padus and later P. serotina (P. padus/P. serotina); or the new host, P. serotina. This experiment investigated if changing the host plant could be beneficial to Y. evonymella in terms of escaping from harmful parasitoids and improving survival rate. We identified nine species of parasitoids that attack larval Y. evonymella, and we found that the number of parasitoid species showed a downward trend from the primary host plant to the P. padus/P. serotina combination to the new host plant alone. We observed a significant difference among variants in relation to the percentage of cocoons killed by specific parasitoids, but no effects of non-specific parasitoids or other factors. Total mortality did not significantly differ (ca. 37%) among larval rearing variants. Changing the host plant caused differences in the structure of the parasitoid complex of Y. evonymella but did not improve its survival rate. This study does not indicate that the host expansion of Y. evonymella is associated with the enemy-free space hypothesis; we therefore discuss alternative scenarios that may be more likely.

scholarly journals Partitioning of herbivore hosts across time and food plants promotes diversification in theMegastigmus dorsalisoak gall parasitoid complex

2017 ◽  
Vol 8 (2) ◽  
pp. 1300-1315 ◽  
Author(s):  
James A. Nicholls ◽  
Karsten Schönrogge ◽  
Sonja Preuss ◽  
Graham N. Stone
Keyword(s):  
Food Plants ◽  
Parasitoid Complex

The parasitoid complex of Parthenolecanium corni Bouché in the city of Tbilisi and its surroundings and comparison with some other European countries

2007 ◽  
Vol 98 (1) ◽  
pp. 53-56 ◽  
Author(s):  
G. Japoshvili ◽  
N. Gabroshvili ◽  
B. Japoshvili
Keyword(s):  
Eastern Europe ◽  
European Countries ◽  
Seasonal Abundance ◽  
Populated Area ◽  
Soft Scale ◽  
Parasitoid Complex ◽  
South Eastern ◽  
Plant Damage ◽  
South Eastern Europe ◽  
The City

AbstractThe European fruit lecanium (EFL), Parthenolecanium corni Bouché (Hemiptera: Coccoidea), is a common and harmful soft scale, which attacks Fraxinus oxycarpa Willd. and other ornamental and orchard plants in Tbilisi, Georgia. This study investigates the phenology, degree of plant damage and effect of parasitoids on this scale in Tbilisi, a densely populated area. We present data on the 32 species of chalcidoid parasitoids recorded from EFL in Georgia and south-eastern Europe. The scale is heavily parasitized in Tbilisi, but we did not find any variation in seasonal abundance. The most common parasitoid of EFL was Blastothrix longipennis (Hymenoptera: Encyrtidae).

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