| structure and development of ovaries in the weevil, anthonomus pomorum (coleoptera, polyphaga). i. somatic tissues of the trophic chamber. | in developing ovarioles of anthonomus pomorum (coleoptera, polyphaga, curculionidae) the trophic chambers (tropharia) are relatively large and consist of clusters (clones) of germ cells and various somatic tissues. each ovariole is enclosed within an outer epithelial sheath (tunica externa). throughout the pupal phase, the growth of this sheath is accelerated and precedes the development of the rest of the ovariole. as a result, the epithelial sheath proliferates anteriorly and forms an elongate ... | 2001 | 11987459 |
| structure and development of ovaries in the weevil, anthonomus pomorum (coleoptera, polyphaga). ii. germ cells of the trophic chamber. | the analysis of the germ cell cluster formation in anthonomus pomorum (coleoptera, polyphaga, curculionidae) has revealed that both linear and branched clones of cystocytes occur in the pupa stage. in the branched clones a poorly developed polyfusome is formed and cystocytes with maximally 3 intercellular bridges were found. in the linear clones the polyfusomes are absent. further divisions of cystocytes produce exclusively linearly arranged cells. just after metamorphosis (imago-a stage), the p ... | 2002 | 12729160 |
| formation of the karyosome in developing oocytes of weevils (coleoptera, curculionidae). | a complex structure termed the karyosome forms in the nuclei of the developing oocytes of anthonomus pomorum, hylobius abietis and phyllobius sp. (coleoptera: curculionidae). it is composed of highly condensed chromosomes, fused with an electron-dense granular material. there are two types of nuclear body associated with the karyosome. the smaller bodies are found in the immediate vicinity of the karyosome. the larger, and more electron-dense, bodies originate next to the condensing chromosomes. ... | 1999 | 18627875 |
| early-season headspace volatiles from apple and their effect on the apple blossom weevil anthonomus pomorum. | apple volatiles emitted at early phenological stages are little investigated, although they may influence behavior of early-season pests. the apple blossom weevil anthonomus pomorum is a herbivore pest of orchards in europe. it colonizes apple trees in early season and oviposits into developing flower buds, often leading to economic damage. using in situ radial diffusive sampling and thermal desorption, followed by gc/ms analysis, headspace volatiles from apple twigs with flower buds at three ea ... | 2010 | 20860027 |
| low-drift nozzles vs. standard nozzles for pesticide application in the biological efficacy trials of pesticides in apple pest and disease control. | the coarse spray air-induction nozzles have documented pesticide drift reducing potential and hence pose lower risk of environmental pollution than the standard fine spray hollow cone nozzles. however, it is questioned that use of the low-drift nozzles might not provide as effective crop protection as the standard nozzles. the objective of work was to assess the pest and disease control efficacy as affected by spray volume rate and nozzle type. the experiment was carried out in apple orchard, cv ... | 2017 | 27720255 |
| a host-plant-derived volatile blend to attract the apple blossom weevil anthonomus pomorum - the essential volatiles include a repellent constituent. | plant volatiles are promising cues for trapping pest insects. this study started with a recently identified complex blend released by prebloom apple trees and aimed to reduce the number of compounds in the blend while maintaining the attraction of the target pest, the apple blossom weevil anthonomus pomorum. an evaluation was made to determine whether attraction to plant volatiles is a general feature in this species. | 2013 | 23450733 |
| snrnps are present in the karyosome capsule in the weevil germinal vesicle. | within the oocyte nucleus of the apple blossom weevil, anthonomus pomorum (insecta, coleoptera) highly condensed and transcriptionaly inactive chromosomes form the karyosome. during its formation, within the nucleoplasm numerous, variably sized spherical inclusions termed nuclear bodies occur. as oogenesis progresses, the karyosome is gradually surrounded by a prominent sheath, the karyosome capsule. the function and molecular composition of both the nuclear bodies and the karyosome capsule are ... | 2004 | 15261745 |
| apple blossom weevil and its control by d. d. t. | | 1946 | 20997947 |