We report the first detection of in France. More than 1860 sentinel egg masses of (BMSB) were exposed in the field during the 2018-2020 period, and 12 specimens of emerged from one egg mass. Their taxonomic identification was confirmed both by morphological and molecular analysis. , similar to , is an egg parasitoid of BMSB in its area of origin in Asia, and both species are considered to be candidates for a classical biological control strategy against BMSB. was previously recorded in Italy where it is well established and widespread, and this may be the source of the French population. Possible permanent establishment and dispersion of in France should be monitored with emphasis on its potential effect on BMSB populations.
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http://dx.doi.org/10.3390/insects12090761 | DOI Listing |
Insects
January 2025
Crop Protection Department, Campus of Botucatu, São Paulo State University, Botucatu 18610-307, SP, Brazil.
The development of the mass rearing technique for the egg parasitoid has been under study for about 20 years, with increasing attention on the development of quality control. Here, we evaluated the behavior, biological parameters, morphometrics and presence of endosymbionts of produced in cryopreserved eggs compared to those produced in traditional fresh stink bug eggs. Parasitoids reared from cryopreserved eggs showed similar parasitism and emergence rates, sex ratios, longevity, morphometrics, and proportions of flyers compared to those originating from fresh eggs.
View Article and Find Full Text PDFInsects
January 2025
Zoological Institute, Russian Academy of Sciences, Universitetskaya 1, 199034 St. Petersburg, Russia.
Insect diapause and response to thermal stress are similar in the variety of manifestations. However, the influence of thermal shocks on the incidence of insect diapause has not been sufficiently studied. Our laboratory experiments showed that both cold (-10 °C) and heat (43 °C) shocks experienced for at least 20-30 min significantly reduced the incidence of facultative larval winter diapause in the insect egg parasitoid .
View Article and Find Full Text PDFInsects
January 2025
MARA-CABI Joint Laboratory for Bio-Safety, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
Aggressive interactions between males are common when victors gain increased mating success but can result in severe injury or death for the defeated. (Hymenoptera: Eupelmidae) is a solitary egg parasitoid of hemipteran and lepidopteran species. Here, we investigated lethal interactions between males and analyzed aggression behavior scaled with the male condition, number of competitors, number of presented females, and female mating status.
View Article and Find Full Text PDFJ Insect Sci
January 2025
Department of Plant Science, McGill University, Montréal, Canada.
The Lepidopteran pest Trichoplusia ni and the parasitoid wasp Trichogramma brassicae represent a fascinating biological system, important for sustainable agricultural practices but challenging to observe. We present a nondestructive method based on micro-CT scanning technology (CT: computed tomography) for visualizing the internal parts of caterpillar embryos and of emerging parasitoids from infected eggs. Traditional methods of microscopic observation of the opaque egg contents require staining or dissection.
View Article and Find Full Text PDFOecologia
January 2025
Department of Soil, Plant and Food Sciences (DiSSPA - Entomology and Zoology), University of Bari, Bari, Italy.
Seminatural habitats in agroecosystems support diverse communities of natural enemies and are expected to promote biological control in crop fields. However, complex landscapes may also support agricultural pests, with undesirable outcomes for crop production. Here, we monitored populations of leafhopper pests and their egg parasitoids in two habitats: vineyards and seminatural habitats.
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