The effect of three constant temperatures on larval critical weight, latent feeding period, larval maximal weight and fecundity of Cnephasia jactatana (Walker) (Lepidoptera: Tortricidae)

Ochieng‘-Odero, J. P. R.

doi:10.1016/0022-1910(92)90041-b

Cited by 13 publications

(6 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…3). In a study conducted on Cnephasia jactatana Walker by using three different temperatures (15, 20 and 25°C), Ochieng-Odero (1992) found higher weights in females reared at 15°C than 20 and 25°C. The reason for that may be that the insects at 15°C have a slower developmental rate.…”

Section: Discussionmentioning

confidence: 96%

Effects of cold exposure on Tenebrio molitor (Coleoptera: Tenebrionidae) pupal period, proportion of adult emergence, weight and deformation percentage

Sönmez

Koç

2019

Entomol. Fennica

View full text Add to dashboard Cite

Low temperatures affect many life history traits of insects. The purpose of this study was to assess the effects of duration of cold exposure on the length of Tenebrio molitor’s pupal period, proportion of adult emergence, adult weight and proportion of deformed adults. The trials were conducted in a laboratory in constant conditions with wheat flour and whole-wheat flour meal were used as food. Cold-exposed groups were achieved by exposing pupae taken on the first day after pupation for 1, 3, 5, 10 and 15 days at +4 °C. The results showed that as the period of cold increased, pupal period extended and proportion of deformed adults increased whereas there were no or less straightforward effects on adult weights and proportion of emerged adults, respectively

show abstract

Section: Discussionmentioning

confidence: 96%

Effects of cold exposure on Tenebrio molitor (Coleoptera: Tenebrionidae) pupal period, proportion of adult emergence, weight and deformation percentage

Sönmez

Koç

2019

Entomol. Fennica

View full text Add to dashboard Cite

show abstract

“…Moreover, elevated temperature as a stressor raised the level of allatotropins and altered the juvenile hormone endocrine system in Drosophila (Gruntenko et al, 2000). In some lepidopteran species high temperature increased mortality, shortened development time, and reduced the size of individuals, consequently decreasing the number of eggs laid (Reynolds and Nottingham, 1985;Ochieng-Odero, 1992). Thermal sensitivity of the metabolic rate is a significant characteristic of different insect species (Berrigan, 1997).…”

Section: Introductionmentioning

confidence: 99%

Temperature-induced stress response in Lymantria dispar neurosecretory neurons

Ilijin¹,

Milena²,

Perić-Mataruga³

et al. 2014

Turk J Biol

View full text Add to dashboard Cite

The release of neurosecretory material from A2 neurosecretory neurons (NSNs) was stimulated in Lymantria dispar fourth instar caterpillars exposed to a temperature of 35 °C for 1, 12, and 24 h, as well as those allowed recover after exposure (12 h at 35 °C, then 12 h at 23 °C). The levels of 2 protein forms with the same molecular mass as bombyxin (3-4 and 4-5 kDa) increased with prolonged exposure to 35 °C. The second band was present only in the groups exposed to this stressor. There was intensified synthetic activity and a low level of secretion in L2' NSNs after exposure to 35 °C. We previously found these NSNs to be immunopositive for prothoracicotropic neurohormone. After this stress, densitometric analysis revealed a decreased amount of the 11-12 kDa isoform (present in the control group). The new isoform (13-15 kDa), expressed after exposure of the insects to a high temperature, increased in amount with prolonged exposure and after recovery at 23 °C. Short-term exposure of caterpillars to high temperatures (35 °C) is a stressor and activates carbohydrate metabolism, while PTTH immunopositive NSNs are secretory-inactive during acute thermal stress regimes.

show abstract

“…Environmental temperature is one of the most important variables that determine the distribution and abundance of species (Cossins & Bowler 1987), as well as population density and gradation power. An unsuitable external temperature affects insect metabolism (Ivanović et al 1992), postpones or totally inhibits development, increases mortality and the occurrence of small individuals (Honda et al 1985;Ochieng-Odero 1992;Matsuki et al 1994).…”

Section: Introductionmentioning

confidence: 99%

The specific response of gypsy moth A1 neurosecretory neurons to different environmental stressors

et al. 2014

View full text Add to dashboard Cite

Changes in the number and morphometric parameters of A1 neurosecretory neurons (nsn) were analyzed in Lymantria dispar 4 th instar caterpillars, exposed for 3 days to different stressors: cadmium, high temperature and tannic acid. The relative cytoplasm density of A1 nsn was also estimated. Caterpillars reared on a diet supplemented with cadmium exhibited increased size of A1 nuclei (10 and 250 µg Cd per g of dry food weight), increased number of nucleolii in nuclei and raised relative cytoplasm density in all experimental groups. Cadmium obviously induces intensive synthetic activity in A1 nsn. The second stressor was high environmental temperature of 35• C. Decrease of all analyzed morphometric parameters suggests that acute exposure of 4 th instar caterpillars to 35• C, as well as 12 h recovery at optimal temperature of 23• C, reduced the activity of A1 nsn. Tannic acid was added to the artificial diet in the following concentrations: 1%, 2.5% and 5%. All estimated morphological parameters did not change after addition 1 and 2.5% of tannic acid. After addition of 5% of tannic acid, the activity of A1 nsn declined.

show abstract

The effect of three constant temperatures on larval critical weight, latent feeding period, larval maximal weight and fecundity of Cnephasia jactatana (Walker) (Lepidoptera: Tortricidae)

Cited by 13 publications

References 15 publications

Effects of cold exposure on Tenebrio molitor (Coleoptera: Tenebrionidae) pupal period, proportion of adult emergence, weight and deformation percentage

Effects of cold exposure on Tenebrio molitor (Coleoptera: Tenebrionidae) pupal period, proportion of adult emergence, weight and deformation percentage

Temperature-induced stress response in Lymantria dispar neurosecretory neurons

The specific response of gypsy moth A1 neurosecretory neurons to different environmental stressors

Contact Info

Product

Resources

About