نتایج جستجو برای: epilachna chrysomelina

تعداد نتایج: 157  

2017
Charlotte M. Smith Cassidy R. Gedling Kiana F. Wiebe Bryan J. Cassone

Worldwidecrop losses due to plant diseases exceed $60 billion annually. Next to fungi, viruses represent the greatest contributor to those losses, and these are transmitted in nature primarily by insects. Mexican bean beetles (Epilachna varivestis) are formidable pests of soybean, as well as efficient vectors of several soybean-infecting viruses, including Bean podmottle virus (BPMV). Beetle-bo...

2011
Eduard Petitpierre

Nearly 260 taxa and chromosomal races of subfamily Chrysomelinae have been chromosomally analyzed showing a wide range of diploid numbers from 2n = 12 to 2n = 50, and four types of male sex-chromosome systems. with the parachute-like ones Xy(p) and XY(p) clearly prevailing (79.0%), but with the XO well represented too (19.75%). The modal haploid number for chrysomelines is n = 12 (34.2%) althou...

Journal: :Proceedings. Biological sciences 2014
Peter Rahfeld Roy Kirsch Susann Kugel Natalie Wielsch Magdalena Stock Marco Groth Wilhelm Boland Antje Burse

Larvae of the leaf beetle subtribe Chrysomelina sensu stricto repel their enemies by displaying glandular secretions that contain defensive compounds. These repellents can be produced either de novo (iridoids) or by using plant-derived precursors (e.g. salicylaldehyde). The autonomous production of iridoids, as in Phaedon cochleariae, is the ancestral chrysomeline chemical defence and predates ...

Journal: :Proceedings. Biological sciences 2012
René Roberto Bodemann Peter Rahfeld Magdalena Stock Maritta Kunert Natalie Wielsch Marco Groth Sindy Frick Wilhelm Boland Antje Burse

Allomones are widely used by insects to impede predation. Frequently these chemical stimuli are released from specialized glands. The larvae of Chrysomelina leaf beetles produce allomones in gland reservoirs into which the required precursors and also the enzymes are secreted from attached gland cells. Hence, the reservoirs can be considered as closed bio-reactors for producing defensive secret...

2015
Pablo Mora Jesús Vela Olivia Sanllorente Teresa Palomeque Pedro Lorite

The ladybird Henosepilachnaargus Geoffroy, 1762 has been cytogenetically studied. In addition we have conducted a review of chromosome numbers and the chromosomal system of sex determination available in the literature in species belonging to the genus Henosepilachna and in its closely related genus Epilachna. Chromosome number of Henosepilachnaargus was 2n=18, including the sex chromosome pair...

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