scholarly journals Effects of artificial diets and floral nectar on parasitization performance of Trichogramma brassicae Bezdenko, 1968 (Hymenoptera: Trichogrammatidae)

2017 ◽  
Vol 41 (1) ◽  
Author(s):  
Nihal ÖZDER ◽  
Şeyda DEMİRTAŞ
Keyword(s):  
Artificial Diets ◽  
Trichogramma Brassicae ◽  
Floral Nectar ◽  
Trichogramma Brassicae Bezdenko

Thermosensibilité des lignées germinales de Trichogramma brassicae Bezdenko (Hymenoptera). Conséquences sur l'efficacité du parasitoïde

1997 ◽  
Vol 75 (3) ◽  
pp. 484-489 ◽  
Author(s):  
J. Chihrane ◽  
G. Laugé
Keyword(s):  
Biological Control ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Ovarian Function ◽  
Thermal Conditions ◽  
Seminal Vesicles ◽  
Trichogramma Brassicae ◽  
Corn Borer ◽  
Large Numbers ◽  
Trichogramma Brassicae Bezdenko

Trichogramma brassicae, a parasitoid used in the biological control of the European corn borer, Ostrinia nubilalis, becomes less effective if certain thermal conditions prevail at the time of its release. A laboratory study demonstrated that the generation liberated in the field had reduced fecundity and that the proportion of females was lower in the following generation. These results prompted us to examine the germ lines of the parasitoid. Exposure to a temperature of 35 °C at the white nymph stage does not affect ovarian function, but exposure to 44 °C does: the number of mature ovocytes at emergence is lower than that observed in controls; certain ovaries are abnormal or remain juvenile. At the time of emergence, the seminal vesicles of male controls contain large numbers of typical sperm and a few atypical sperm, the latter becoming more numerous in males exposed to 35 °C. After exposure to 44 °C, vesicles contain only a few sperm or are completely empty. Since T. brassicae is an arrhenotokous parthenogenetic species (unfertilized eggs become males), these observations explain the reduced number of females in the second generation.[Journal translation]

Effects of emamectin benzoate and cypermethrin on the demography of Trichogramma brassicae Bezdenko

2018 ◽  
Vol 110 ◽  
pp. 269-274 ◽  
Author(s):  
Ehsan Parsaeyan ◽  
Seyed Ali Safavi ◽  
Moosa Saber ◽  
Nafiseh Poorjavad
Keyword(s):  
Trichogramma Brassicae ◽  
Emamectin Benzoate ◽  
Trichogramma Brassicae Bezdenko

INUNDATIVE RELEASE OF TRICHOGRAMMA BRASSICAE BEZDENKO (HYMENOPTERA: TRICHOGRAMMATIDAE) FOR CONTROL OF EUROPEAN CORN BORER IN SWEET CORN

1994 ◽  
Vol 126 (2) ◽  
pp. 291-301 ◽  
Author(s):  
Dicky S. Yu ◽  
J. Robert Byers
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Potential Method ◽  
Trap Catch ◽  
Trichogramma Brassicae ◽  
Corn Borer ◽  
Inundative Release ◽  
Southern Alberta ◽  
Experimental Plots ◽  
Trichogramma Brassicae Bezdenko

AbstractInundative release of Trichogramma brassicae Bezdenko for control of European corn borer was tested in experimental plots in 1991 and 1992 in southern Alberta, Canada, to determine its effectiveness as a potential method of control in sweet corn. The tests were conducted in 1-ha plots, in three different fields of irrigated sweet corn each year, at a release level of about 196 000 wasps per ha. The reduction in European corn borer damage in the release plots ranged from 85 to 87% in 1991 and from 45 to 95% in 1992. The reduction in damage was not significantly different in fields with 25 and 49 release points. General area degree-day accumulation for postdiapause development was not adequate to determine the timing of release for individual fields because European corn borer phenology varied among fields. Total moth catch in pheromone traps, however, was directly related to the number of plants damaged by European corn borer, and releases near the time of peak trap catch produced the greatest reduction in damage.

scholarly journals Prva najdba parazitoidne ose Trichogramma brassicae Bezdenko, 1968 (Hymenoptera, Trichogrammatidae) v Sloveniji

2015 ◽  
Vol 105 (2) ◽  
pp. 323-327 ◽  
Author(s):  
Tanja BOHINC ◽  
Stefan SCHMIDT ◽  
Juan Carlos MONJE ◽  
Stanislav TRDAN
Keyword(s):  
Trichogramma Brassicae ◽  
Trichogramma Brassicae Bezdenko
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