The influence of two endoparasitic wasps, Hyposoter didymator and Chelonus inanitus, on the growth and food consumption of their host larva Spodoptera littoralis

BioControl ◽  
2006 ◽  
Vol 52 (2) ◽  
pp. 145-160 ◽  
Author(s):  
J. Morales ◽  
P. Medina ◽  
E. Viñuela
Keyword(s):  
Food Consumption ◽  
Spodoptera Littoralis ◽  
Host Larva ◽  
Hyposoter Didymator

scholarly journals Transgenic plants expressing immunosuppressive dsRNA improve entomopathogen efficacy against Spodoptera littoralis larvae

2022 ◽  
Author(s):  
Ilaria Di Lelio ◽  
Eleonora Barra ◽  
Mariangela Coppola ◽  
Giandomenico Corrado ◽  
Rosa Rao ◽  
...  
Keyword(s):  
Immune Response ◽  
Bacillus Thuringiensis ◽  
Transgenic Plants ◽  
Food Consumption ◽  
Spodoptera Littoralis ◽  
Tobacco Plants ◽  
Double Stranded Rna ◽  
Killing Activity ◽  
Lepidopteran Larvae ◽  
Lepidopteran Pest

AbstractTransgenic plants that express double-stranded RNA (dsRNA) targeting vital insect genes have recently emerged as a valuable new tool for pest control. In this study, tobacco plants were transformed to produce dsRNA targeting Sl 102 gene that is involved in the immune response of Spodoptera littoralis larvae, a serious lepidopteran pest of several crops. Experimental larvae reared on transgenic tobacco lines showed (1) a strongly reduced level of Sl 102 transcripts, which was positively associated with food consumption; (2) a substantial impairment of the encapsulation response mediated by hemocytes; and (3) a marked increase in the susceptibility to Xentari™, a Bacillus thuringiensis-based insecticide. Importantly, this approach may allow a reduction in the doses of B. thuringiensis used for field applications and enhance its killing activity on mature larvae. The results obtained thus support the use of immunosuppressive RNAi plants to enhance the performance of microbial insecticides on lepidopteran larvae.

Growth, food consumption and food utilisation of Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) on Four food-plants

1981 ◽  
Vol 71 (4) ◽  
pp. 655-662 ◽  
Author(s):  
Y. A. Duodu ◽  
F. F. Biney
Keyword(s):  
Food Consumption ◽  
Spodoptera Littoralis ◽  
Food Plants ◽  
Laboratory Evaluation ◽  
Digestive Efficiency ◽  
Fresh Weight ◽  
Prepupal Stage ◽  
Total Food ◽  
Food Utilisation ◽  
Lepidoptera Noctuidae

AbstractA laboratory evaluation of growth, food consumption and food utilisation by larvae of Spodoptera littoralis (Boisd.) was made from the beginning of the fifth instar to the prepupal stage on cabbage, cotton, kenaf and Congo jute (Urena lobata). Growth, measured by daily larval fresh weight, was highest on cabbage and similar on kenaf, Urena and cotton. Development was fastest on cabbage and slowest on cotton and Urena. Larvae underwent an extra moult on the latter two food-plants. Weight gain was highest on cabbage, followed by cotton, Urena and kenaf, in that order. Total food consumption was highest on cotton and lowest on kenaf and Urena. Cabbage was most efficiently digested, followed by kenaf, cotton and Urena, in that order. Digestive efficiency on all four plants declined with larval age. The efficiency of conversion of ingested food to body material was highest on cabbage and lowest on cotton and kenaf. Digested portions of Urena were most efficiently converted to body substance while digested portions of cabbage and kenaf were most inefficiently converted to body material. It is concluded that S. littoralis is better adapted to cabbage than any of the other three plants and that increasing cultivation of cabbage in Ghana is likely to enhance the pest status of the insect.

Entomopathogenic fungal endophyte-mediated tritrophic interactions between Spodoptera littoralis and its parasitoid Hyposoter didymator

2021 ◽  
Author(s):  
P. Miranda-Fuentes ◽  
M. Yousef-Yousef ◽  
P. Valverde-García ◽  
Irene M. Rodríguez-Gómez ◽  
I. Garrido-Jurado ◽  
...  
Keyword(s):  
Tritrophic Interactions ◽  
Spodoptera Littoralis ◽  
Fungal Endophyte ◽  
Hyposoter Didymator

scholarly journals Persistent expression of a newly characterized Hyposoter didymator polydnavirus gene in long-term infected lepidopteran cell lines

2001 ◽  
Vol 82 (4) ◽  
pp. 963-969 ◽  
Author(s):  
Anne-Nathalie Volkoff ◽  
Janick Rocher ◽  
Pierre Cérutti ◽  
Marc C. P. Ohresser ◽  
Yves d’Aubenton-Carafa ◽  
...  
Keyword(s):  
Cell Lines ◽  
Spodoptera Littoralis ◽  
Trichoplusia Ni ◽  
Untranslated Region ◽  
Reading Frame ◽  
Short Open Reading Frame ◽  
Hyposoter Didymator ◽  
Insect Cell Lines ◽  
Lepidopteran Cell Lines

An Hyposoter didymator ichnovirus (HdIV) gene was stably maintained and efficiently transcribed in lepidopteran cell lines more than 3 years after HdIV infection. This K-gene had two introns and the fully spliced cDNA, named K19, comprised a short open reading frame and a long 3′-untranslated region with 13 imperfectly repeated sequences (44 to 102 nt). Transcripts related to the K-gene were detected in several long-term infected cell lines (Sf9, Spodoptera littoralis haemocytes, Trichoplusia ni). Conversely, no transcripts related to seven other viral cDNAs were detected, suggesting that the K-related DNA is selectively retained in long-term infected Sf9 cells. The function of the K-gene product and its association with stably transformed insect cell lines remains to be investigated.

Influence of Maternal Education on Food Consumption and Energy and Nutrient Intake in a Group of Pre-School Children from Madrid

2003 ◽  
Vol 73 (6) ◽  
pp. 439-445 ◽  
Author(s):  
Navia ◽  
Ortega ◽  
Requejo ◽  
Perea ◽  
López-Sobaler ◽  
...  
Keyword(s):  
Food Consumption ◽  
School Children ◽  
Food Habits ◽  
Nutrient Intake ◽  
Maternal Education ◽  
Statistical Significance ◽  
Dietary Adequacy ◽  
Consumption Energy ◽  
Maternal Educational Level ◽  
Energy And Nutrient Intake

A study was conducted on the influence of maternal education level on food consumption, energy and nutrient intake, and dietary adequacy in 110 pre-school children from Madrid, Spain. With increasing maternal education, children consumed more sugar (p < 0.05), fruit (p < 0.05), and fish (p < 0.05). Snacking was more frequent with decreasing maternal education (p < 0.05). Though statistical significance was not reached, the consumption of pre-cooked foods was greater among children of mothers educated to a higher level, a phenomenon probably related to the work situation of these women. With respect to dietary composition, no significant differences were found between groups for macronutrient, fiber and energy intakes, except for energy supplied by polyunsaturated fatty acids (PUFA), which was greater in the children of less educated women (p < 0.01). This is probably due to their greater consumption of sunflower seed oil. The diets of children belonging to well-educated mothers came closer to meeting the recommended intakes for folate, vitamin C, and iodine. It would seem that maternal educational level influences the food habits of children. Mothers with less education may require special advice in this area.

Men’s Hunger, Food Consumption, and Preferences for Female Body Types

2014 ◽  
Vol 45 (6) ◽  
pp. 495-497 ◽  
Author(s):  
Nicolas Guéguen
Keyword(s):  
Food Consumption ◽  
Female Body ◽  
The Body ◽  
Slender Body ◽  
Mediation Effect ◽  
Point Scale ◽  
Body Type ◽  
Experimental Conditions

Nelson and Morrison (2005 , study 3) reported that men who feel hungry preferred heavier women. The present study replicates these results by using real photographs of women and examines the mediation effect of hunger scores. Men were solicited while entering or leaving a restaurant and asked to report their hunger on a 10-point scale. Afterwards, they were presented with three photographs of a woman in a bikini: One with a slim body type, one with a slender body type, and one with a slightly chubby body. The participants were asked to indicate their preference. Results showed that the participants entering the restaurant preferred the chubby body type more while satiated men preferred the thinner or slender body types. It was also found that the relation between experimental conditions and the choices of the body type was mediated by men’s hunger scores.

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