Search results for "entomologie"
showing 10 items of 46 documents
Festschrift zum 60. Geburtstage von Professor Dr. Embrik Strand [Festschrift zum sechzigsten Geburtstage von Professor Dr. Embrik Strand], Vol.4
1938
Jubilāram veltīti ārvalstu zoologu un paleontologu raksti.
Festschrift zum 60. Geburtstage von Professor Dr. Embrik Strand [Festschrift zum sechzigsten Geburtstage von Professor Dr. Embrik Strand], Vol.1
1936
Jubilāram veltīti ārvalstu zoologu un paleontologu raksti vācu, franču, angļu, itāliešu u.c. valodās.
Festschrift zum 60. Geburtstage von Professor Dr. Embrik Strand [Festschrift zum sechzigsten Geburtstage von Professor Dr. Embrik Strand], Vol.3
1937
Jubilāram veltīti ārvalstu zoologu un paleontologu raksti vācu, franču, angļu, itāliešu u.c. valodās.
Festschrift zum 60. Geburtstage von Professor Dr. Embrik Strand [Festschrift zum sechzigsten Geburtstage von Professor Dr. Embrik Strand], Vol.2
1936
Jubilāram veltīti ārvalstu zoologu un paleontologu raksti vācu, franču, angļu, itāliešu u.c. valodās.
IPM-recommended insecticides harm beneficial insects through contaminated honeydew
2020
The use of some systemic insecticides has been banned in Europe because they are toxic to beneficial insects when these feed on nectar. A recent study shows that systemic insecticides can also kill beneficial insects when they feed on honeydew. Honeydew is the sugar-rich excretion of hemipterans and is the most abundant carbohydrate source for beneficial insects such as pollinators and biological control agents in agroecosystems. Here, we investigated whether the toxicity of contaminated honeydew depends on i) the hemipteran species that excretes the honeydew; ii) the active ingredient, and iii) the beneficial insect that feeds on it. HPLC-MS/MS analyses demonstrated that the systemic insec…
Clinicopathological profile of gastrointestinal tuberculosis: a multinational ID-IRI study
2020
Data are relatively scarce on gastro-intestinal tuberculosis (GITB). Most studies are old and from single centers, or did not include immunosuppressed patients. Thus, we aimed to determine the clinical, radiological, and laboratory profiles of GITB. We included adults with proven GITB treated between 2000 and 2018. Patients were enrolled from 21 referral centers in 8 countries (Belgium, Egypt, France, Italy, Kazakhstan, Saudi Arabia, UK, and Turkey). One hundred four patients were included. Terminal ileum (n = 46, 44.2%), small intestines except terminal ileum (n = 36, 34.6%), colon (n = 29, 27.8%), stomach (n = 6, 5.7%), and perianal (one patient) were the sites of GITB. One-third of all p…
Le Scarabée des hiéroglyphes
2021
Number 2 of the annual gazette of the Association des Amis de Charles Nodier considering different aspects of the life and work of Charles Nodier and, more specifically this number, of his daughter Marie Mennessier-Nodier, from a popular and fun perspective.
Attraction of egg-killing parasitoids toward induced plant volatiles in a multi-herbivore context
2015
In response to insect herbivory, plants emit volatile organic compounds which may act as indirect plant defenses by attracting natural enemies of the attacking herbivore. In nature, plants are often attacked by multiple herbivores, but the majority of studies which have investigated indirect plant defenses to date have focused on the recruitment of different parasitoid species in a single-herbivore context. Here, we report our investigation on the attraction of egg parasitoids of lepidopteran hosts (Trichogramma brassicae and T. evanescens) toward plant volatiles induced by different insect herbivores in olfactometer bioassays. We used a system consisting of a native crucifer, Brassica nigr…
Une relation trophique originale : la vection entomophile d'agents pathogènes
2013
Bgpi : équipe 6 chapitre 34; Une relation trophique originale : la vection entomophile d'agents pathogènes
External and internal elimination of supernumerary larvae in the whitefly parasitoid Eretmocerus mundus Mercet (Hymenoptera: Aphelinidae)
2008
Abstract The solitary parasitoid Eretmocerus mundus Mercet (Hymenoptera: Aphelinidae) is one of the key biological control agents of the whitefly Bemisia argentifolii Bellows & Perring, also known as B. tabaci (Gennadius) B-biotype (Homoptera: Aleyrodidae). We present new information on its biology, and particularly about larval elimination during the first instar in cases of superparasitism. For the first time, physical elimination of supernumerary larvae was observed, both outside and inside the host. These findings are documented with confocal microscopy images and video recordings. We observed more than 350 B. argentifolii nymphs, parasitized with one, two or more than two larvae. Physi…