Effect of nutritional stress and larval crowding on survival development and reproductive output of Mediterranean flour moth &lt;i&gt;Ephestia kuehniella&lt;/i&gt; Zeller

Bhavanam, Santhi; Wang, Q.; He, X. Z.

doi:10.30843/nzpp.2012.65.5383

Cited by 11 publications

(10 citation statements)

References 10 publications

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“…Moreover, the adults were smaller than the ones that emerged when reared on a standard diet. In this study, E. kuehniella development time was longer than the one reported by Bhavanam et al (2012) on an artificial diet consisting of wholemeal wheat flour, maize meal, brewer's yeast and glycerine. The nutritional composition of semolina is poorer than the diet used by Bhavanam et al (2012).…”

Section: Discussioncontrasting

confidence: 58%

“…In this study, E. kuehniella development time was longer than the one reported by Bhavanam et al (2012) on an artificial diet consisting of wholemeal wheat flour, maize meal, brewer's yeast and glycerine. The nutritional composition of semolina is poorer than the diet used by Bhavanam et al (2012). E. kuehniella has fewer nutritional needs compared to other pyralids because it can also develop on refined flours (Jacob and Cox, 1977;Stein and Parra, 1987).…”

Section: Discussioncontrasting

confidence: 58%

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Can environmental dust from silo area allow the development of stored product insects?

Locatelli

Savoldelli

Girgenti

et al. 2017

Journal of Stored Products Research

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Dust derived from food processing can accumulate in places difficult to reach, where stored-product pests could thrive. The purpose of this work was to verify the development of Plodia interpunctella, Ephestia kuehniella, and Tribolium castaneum in dust collected on pipes and beams (15 m and 7.5 m) in a silo area of a pasta industry. Proximate analyses showed a higher metal content in the dust collected at the two different heights than semolina, including the presence of chrome, cobalt, arsenic, and lead. Particle size distribution analysis showed that in the two samples of dust the highest percentage was constituted by particle sizes smaller than 106 μm. The tests were carried out by using two quantities 4 g or 0.15 g of dust (corresponding to 3 mm and 0.1 mm), at controlled conditions. Fifty larvae, 0-24 hours old, of each species, were used for each dust, semolina, and thickness test. The number of emerged adults was assessed daily. T. castaneum developed on all the tested substrates, despite the high content of metals and the small particle size in the environmental dust. A significant interaction between diet and thickness of the layer was observed, but thickness had a stronger influence than diet. Moreover, light filth analysis detected a large number of fragments of Tribolium sp. in dust collected at a different height. Dust was unsuitable for the development of moths; only two E. kuehniella adults emerged from 3-mm-deep dust collected at 15 m, and development lasted more than 90 d.

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Section: Discussioncontrasting

confidence: 58%

Section: Discussioncontrasting

confidence: 58%

Can environmental dust from silo area allow the development of stored product insects?

Locatelli

Savoldelli

Girgenti

et al. 2017

Journal of Stored Products Research

View full text Add to dashboard Cite

show abstract

“…We established a laboratory colony using larvae that hatched from these eggs. Briefly, we introduced 200 neonate larvae into a transparent plastic cylinder (8 cm diameter × 10 cm height) with 50 g standard diet (ad libitum; Bhavanam et al 2012 ) consisting of maize meal, whole meal wheat flour, glycerine, and yeast with a ratio = 43.5:43.5:10.0:3.0. We covered the cylinder with 2 layers of cloth mesh.…”

Section: Methodsmentioning

confidence: 99%

Larval social cues influence testicular investment in an insect

Liu

Zheng

et al. 2021

Current Zoology

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Socio-sexual environment can have critical impacts on reproduction and survival of animals. Consequently, they need to prepare themselves by allocating more resources to competitive traits that give them advantages in the particular social setting they have been perceiving. Evidence shows that a male usually raises his investment in sperm after he detects the current or future increase of sperm competition because relative sperm numbers can determine his paternity share. This leads to the wide use of testis size as an index of the sperm competition level, yet testis size does not always reflect sperm production. To date, it is not clear whether male animals fine-tune their resource allocation to sperm production and other traits as a response to social cues during their growth and development. Using a polygamous insect Ephestia kuehniella, we tested whether and how larval social environment affected sperm production, testis size and body weight. We exposed the male larvae to different juvenile socio-sexual cues and measured these traits. We demonstrate that regardless of sex ratio, group-reared males produced more eupyrenes (fertile and nucleate sperm) but smaller testes than singly-reared ones, and that body weight and apyrene (infertile and anucleate sperm) numbers remained the same across treatments. We conclude that the presence of larval social, but not sexual cues, is responsible for the increase of eupyrene production and decrease of testis size. We suggest that male larvae increase investment in fertile sperm cells and reduce investment in other testicular tissues in the presence of conspecific juvenile cues.

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“…From an adaptive perspective, one advantage of this asexual reproduction was to maintain populations at a certain level in adverse conditions or in the absence of males ( Abbes and Chermiti 2014 ). The results of the sexually reproductive offspring of the parthenogenetic population had a lower egg hatch rate, higher larval mortality, shorter larval duration, shorter life span, and lower sex ratio than that of non-parthenogenesis (normal) population suggests that malnutrition caused by overcrowding during larval development negatively impacted on transgenerational reproduction ( Fischer and Fiedler 2001 , Bauerfeind and Fischer 2005 , Bhavanam et al 2012 ). Thus, the occurrence of parthenogenesis under less favorable conditions could reduce reproductive potential and be beneficial to the overall fitness of the population under stressful conditions.…”

Section: Discussionmentioning

confidence: 99%

Occurrence of Parthenogenesis in Potato Tuber Moth

Liu

Wang

et al. 2018

Journal of Insect Science

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Parthenogenesis, a natural form of asexual reproduction produced from unfertilized eggs, occurs in many insects in Hemiptera and Hymenoptera, but very rarely in Lepidoptera. The current study aimed to test the larval density dependent occurrence of parthenogenesis in potato tuber moth, Phthorimaea operculella (Zeller; Lepidoptera: Gelechiidae) under laboratory conditions. More than 10% of females out of 25 tested females that developed from the high larval density treatment at 45 larvae per tuber were capable to reproduce asexually. Both male and female offspring were produced parthenogenetically. The sexually reproductive offspring of a laboratory parthenogenetic population had a lower egg hatch rate, shorter larval stage, and shorter male life span when compared with the non-parthenogenetic population. This suggests that the sexually reproductive offspring of parthenogenetic population have a decreased overall fitness compared to the sexually reproductive offspring of non-parthenogenetic population.

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Effect of nutritional stress and larval crowding on survival development and reproductive output of Mediterranean flour moth <i>Ephestia kuehniella</i> Zeller

Cited by 11 publications

References 10 publications

Can environmental dust from silo area allow the development of stored product insects?

Can environmental dust from silo area allow the development of stored product insects?

Larval social cues influence testicular investment in an insect

Occurrence of Parthenogenesis in Potato Tuber Moth

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