Results 151 to 160 of about 930 (191)

Circadian clock genes and photoperiodic diapause in the moth Sesamia nonagrioides

Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, 2023
Insects, like most organisms, have an internal circadian clock that oscillates with a daily rhythmicity, and a timing mechanism (photoperiodic clock) that mediates seasonal events, including diapause. It has been argued that there is a connection between the two clocks.
Anna, Kourti, Dimitrios, Kontogiannatos, Theodoros, Gkouvitsas, Polydefkis, Hatzopoulos   +3 more
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Brain-independent development in the moth Sesamia nonagrioides

Journal of Insect Physiology, 2010
The caterpillars of Sesamia nonagrioides developing under long-day (LD) photoperiod pupate in the 5th or 6th instar whereas under short day (SD) conditions they enter diapause and undergo several extra larval molts. The diapause is terminated within 1-3 instars upon transfer of SD larvae to the LD conditions.
Meritxell, Pérez-Hedo, Matilde, Eizaguirre, Frantisek, Sehnal   +2 more
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Temperature-dependent development of Sesamia nonagrioides

Journal of Pest Science, 2013
The effect of various constant temperatures on survival, development and adult longevity of Sesamia nonagrioides Lefebvre (Lepidoptera: Noctuidae) was studied under laboratory conditions. The following temperatures were tested: 14, 17, 21, 25 and 31 °C.
Stefanos S. Andreadis, Nikolaos K. Kagkelaris, Panagiotis A. Eliopoulos, Matilda Savopoulou-Soultani   +3 more
openaire   +1 more source

Response of Mythimna unipuncta Males to Components of the Sesamia nonagrioides Pheromone

Journal of Chemical Ecology, 2009
Several sympatric lepidopteran species feed on maize plants, and the different components of their species-specific female sex pheromones may play a role in attracting conspecifics and/or deter heterospecific males. In this study, we analyzed the content of Mythimna unipuncta pheromone glands and tested the response of males to components of their own ...
Eizaguirre Altuna, Matilde, López Alonso, Carmen, Sans i Badia, Albert, Bosch Serra, Dolors, Albajes Garcia, Ramon   +4 more
openaire   +3 more sources

Juvenile hormone and diapause in the Mediterranean corn borer, Sesamia nonagrioides

Journal of Insect Physiology, 1998
Juvenile hormone content of Sesamia nonagrioides larvae reared under different environmental conditions that induce diapause was studied using a bioassay on newly-emerged Tribolium confusum pupae. Two analytical methods were also used to measure JHIII content. Extracts from larvae that developed under different conditions of photoperiod and temperature
Matilde, Eizaguirre, Jordi, Prats, Meritxell, Abellana, , Carmen López, Monserrat, Llovera, Ramon, Canela   +5 more
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The molecular and physiological impact of bisphenol A in Sesamia nonagrioides (Lepidoptera: Noctuidae)

Ecotoxicology, 2014
In the present study we investigated the potential relative effects of bisphenol A (BPA) and RH-5992 (tebufenozide) on the development and metamorphosis of the corn stalk borer, Sesamia nonagrioides (Lepidoptera: Noctuidae). A number of morphological and molecular factors were examined in order to identify the toxic and the endocrine-relative action of
Dimitris, Kontogiannatos, Luc, Swevers, Giannis, Zakasis, Anna, Kourti   +3 more
openaire   +2 more sources

Effects of Sublethal Concentrations of Bacillus thuringiensis on Larval Development of Sesamia nonagrioides

Journal of Economic Entomology, 2005
In the Mediterranean Basin, developed diapausing larvae of the borer Sesamia nonagrioides Lefèbvre are found consistently during autumn in transgenic corn, Zea mays L., expressing Bacillus thuringiensis Berliner (Bt) toxins derived from event 176. These larvae can feed on sublethal concentrations of Bt toxins because the expression of this corn toxin ...
M, Eizaguirre, S, Tort, C, López, R, Albajes   +3 more
openaire   +2 more sources

Juvenile hormone esterase activity in the pupating and diapausing larvae of Sesamia nonagrioides

Journal of Insect Physiology, 2008
The development of the Mediterranean corn borer, Sesamia nonagrioides, under long-day (LD) photoperiod is associated with juvenile hormone (JH) decline and pupation in the 5th or 6th larval instar. The larvae grown under short-day (SD) conditions maintain a moderate JH titer and enter diapause during which they undergo several extra larval molts.
Christa, Schafellner, Matilde, Eizaguirre, Carmen, López, Frantisek, Sehnal   +3 more
openaire   +2 more sources

Phenological Model forSesamia nonagrioides(Lepidoptera: Noctuidae)

Environmental Entomology, 2001
Abstract The development time of different stages of Sesamia nonagrioides Lefevbre was studied in the laboratory at constant temperatures in the range 10–36°C. The relationship between the developmental rate (1/d) and the temperature (°C) was determined using both linear and nonlinear (Logan type III) models.
Carmen López, Albert Sans, Luis Asin, Matilde EizaGuirre   +3 more
openaire   +1 more source

Effect of DIMBOA on growth and digestive physiology of Sesamia nonagrioides (Lepidoptera: noctuidae) larvae

Journal of Insect Physiology, 1998
The hydroxamic acid 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA) was assessed for its effect on growth and digestive physiology of larvae of the stalk corn borer Sesamia nonagrioides Lef. Nutritional indices and activities of some digestive and detoxification enzymes were determined for larvae feeding on a DIMBOA-containing diet for the first ...
P, Castañera, M, Rui;z, F, Ortego
openaire   +2 more sources