Manually-extracted unfertilized eggs of Chinese oak silkworm, Antheraea pernyi, enhance mass production of Trichogramma parasitoids

2020 ◽  
Vol 40 (4) ◽  
pp. 397-406 ◽  
Author(s):  
Yong Wang ◽  
Zhi-Peng Zou ◽  
Yang-Yang Hou ◽  
Xiangbing Yang ◽  
Su Wang ◽  
...  
Insects ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 694
Author(s):  
Jing Wang ◽  
Yong-Ming Chen ◽  
Xiang-Bing Yang ◽  
Rui-E Lv ◽  
Nicolas Desneux ◽  
...  

Aprostocetus brevipedicellus, a eulophid gregarious egg parasitoid of lepidopterous pests, is a potential biological control agent for the control of many forest pests. A dominant factitious host, Antheraea pernyi, has been widely used for mass rearing several parasitoids in China. However, whether A. pernyi eggs are suitable for A. brevipedicellus rearing remains unclear. Here we evaluated A. brevipedicellus parasitism and fitness of their offspring on A. pernyi eggs with five different treatments, including manually-extracted, unfertilized and washed eggs (MUW), naturally-laid, unfertilized and washed eggs (NUW), naturally-laid, unfertilized, and unwashed (NUUW) eggs, naturally-laid, fertilized and washed eggs (NFW), and naturally-laid, fertilized and unwashed eggs (NFUW). The results showed that A. brevipedicellus could parasitize host eggs in all treatments but significantly preferred MUW eggs to other treatments. Moreover, A. brevipedicellus preferred unfertilized eggs to fertilized eggs and parasitized more washed eggs than unwashed. The pre-emergence time of parasitoid offspring emerging from fertilized eggs was shorter than that from unfertilized eggs. More parasitoid offspring emerged from unwashed eggs than that from washed eggs. The offspring emergence rate was high (>95%) and also female-biased (>85%) among all egg treatments. The egg load of female parasitoid offspring emerging from MUW and NUW eggs was 30–60% higher than the remaining treatments. Overall, MUW eggs of A. pernyi are the most suitable for the mass production of A. brevipedicellus.


2018 ◽  
Vol 74 (4) ◽  
pp. 959-965 ◽  
Author(s):  
Jun-Jie Zhang ◽  
Xue Zhang ◽  
Lian-Sheng Zang ◽  
Wen-Mei Du ◽  
Yang-Yang Hou ◽  
...  

2019 ◽  
Vol 42 ◽  
Author(s):  
Joseph A. Tainter ◽  
Temis G. Taylor

Abstract We question Baumard's underlying assumption that humans have a propensity to innovate. Affordable transportation and energy underpinned the Industrial Revolution, making mass production/consumption possible. Although we cannot accept Baumard's thesis on the Industrial Revolution, it may help explain why complexity and innovation increase rapidly in the context of abundant energy.


1988 ◽  
Vol 102 ◽  
pp. 129-132
Author(s):  
K.L. Baluja ◽  
K. Butler ◽  
J. Le Bourlot ◽  
C.J. Zeippen

SummaryUsing sophisticated computer programs and elaborate physical models, accurate radiative and collisional atomic data of astrophysical interest have been or are being calculated. The cases treated include radiative transitions between bound states in the 2p4and 2s2p5configurations of many ions in the oxygen isoelectronic sequence, the photoionisation of the ground state of neutral iron, the electron impact excitation of the fine-structure forbidden transitions within the 3p3ground configuration of CℓIII, Ar IV and K V, and the mass-production of radiative data for ions in the oxygen and fluorine isoelectronic sequences, as part of the international Opacity Project.


Author(s):  
K. Yoshida ◽  
F. Murata ◽  
S. Ohno ◽  
T. Nagata

IntroductionSeveral methods of mounting emulsion for radioautography at the electron microscopic level have been reported. From the viewpoint of quantitative radioautography, however, there are many critical problems in the procedure to produce radioautographs. For example, it is necessary to apply and develop emulsions in several experimental groups under an identical condition. Moreover, it is necessary to treat a lot of grids at the same time in the dark room for statistical analysis. Since the complicated process and technical difficulties in these procedures are inadequate to conduct a quantitative analysis of many radioautographs at once, many factors may bring about unexpected results. In order to improve these complicated procedures, a simplified dropping method for mass production of radioautographs under an identical condition was previously reported. However, this procedure was not completely satisfactory from the viewpoint of emulsion homogeneity. This paper reports another improved procedure employing wire loops.


1935 ◽  
Vol 14 (8) ◽  
pp. 434
Author(s):  
Bailey ◽  
P.E. Biggar ◽  
Hood ◽  
Herbert Austin ◽  
T. Fraser ◽  
...  
Keyword(s):  

Author(s):  
Ted Geier

Considers mass readership and the ‘tastes’ it produces. Maps the history of criminals and execution spectacles, particularly as addressed by the London ‘public’ voices of Defoe and Dickens. Connects these mass events to the new mass print culture and circulation forms, such as the penny dreadfuls and their Newgate novel precursor. This shows the development of the public’s ‘taste for blood’, anxieties at an encroaching nonhumanity, and an infatuation with the inhuman from Jack Sheppard to Sweeney Todd and Dracula.


2018 ◽  
Vol 159 (18) ◽  
pp. 703-708
Author(s):  
Gábor Vasas

Abstract: More than 90% of herbal products and herbal medicines have been derived from higher plants recently, but due to independent circumstances, several photosynthetic microalgal species are in focus in this point of view. In the last 50 years, many carbohydrate-, peptide-, terpenoid-, alkaloid- and phenol-type components were described from algae because of the developing structural determination and analytical methods, algae mass production and also artificial algae technologies. At the same time, based partly on traditional causes and partly on the clinical and preclinical data of today, some dried products of algae are directly used as food supplements. Hereinafter, the historical background, economic significance and metabolic background of the mostly used microalgal species will be reviewed. The diverse metabolite production of these organisms will be demonstrated by some molecules with special bioactivity. Several preclinical and clinical studies will be described relating to the microalgal species Spirulina sp., Chlorella sp., Haematococcus sp. and Dunaliella sp. Orv Hetil. 2018; 159(18): 703–708.


Sign in / Sign up

Export Citation Format

Share Document