Effect of Temperature on the Development, Survival, and Fecundity of Heliothis viriplaca (Lepidoptera: Noctuidae)

Abstract

Heliothis viriplaca (Hüfnagel) (Lepidoptera: Noctuidae) is worldwide an important economic pest of major agricultural crops. The effect of temperature on the biology, in particular the duration of the different developmental stages, of this insect pest was examined. The development, survival, and fecundity of H. viriplaca at five different temperatures (22, 25, 28, 31, and 34°C) were investigated, and experimental population life tables calculated. The results show that the developmental time of larvae, pupae, pre-oviposition, adults, and the entire generation decreases with increasing temperature. Larvae emerged fastest from the eggs at 28°C. The percentage of larvae that reached the seventh instar stage was 32.69, 38.60, 19.67, 3.61, and 20.88% at 22, 25, 28, 31, and 34°C, respectively. The developmental threshold temperature of the eggs, larvae, pupae, pre-oviposition and total pre-oviposition period was 10.53, 12.34, 5.60, 11.47, and 10.01°C, respectively. The effective accumulative temperature was 42.90, 239.68, 309.19, 77.72, and 767.64 degree-days, respectively. The population trend index (I) and the intrinsic rate of increase (r) of H. viriplaca were the highest at 31°C (133.97 and 0.12 d−1, respectively). The results of this study may be useful for predicting the population dynamics of H. viriplaca and thus provides information on this important insect pest that may assist in its management.

Stimulation of Insect Herbivory by Elevated Temperature Outweighs Protection by the Jasmonate Pathway

“…This hypothesis is consistent with the variable effects of rising temperature on different insect herbivore-plant pairs [31], as well as the recent finding that temperature-dependent accumulation of HSP90 enhances JA-dependent wound responses by a mechanism likely involving COI1 stabilization [37]. Although ET conditions greatly stimulated the feeding activity of T. ni larvae, additional studies are needed to determine the effect of this climate variable on other stages of the insect life cycle [38][39][40]. Finally, we note that the recent discovery of phyB as a temperature sensor [11][12][13], together with the observation that loss of phyB relaxes growth-defense tradeoffs in a jaz quintuple mutant of Arabidopsis [41], opens new avenues for research to explore the complex effects of light quality and temperature on plant-insect relationships.…”

Thermal Effects on the Population Parameters and Growth of Acyrthosiphon pisum (Harris) (Hemiptera: Aphididae)

“…Their rates of development, survival, longevity and reproduction depend on biotic (e.g., host plants) and abiotic factors (e.g., temperature, humidity and photoperiod). Temperature is a notable abiotic factor that facilitates the development and fecundity of the insects [ 11 , 12 , 13 , 14 ]. Many studies have introduced temperature-dependent development models based on the developmental rates of insects at different temperatures [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ].…”

Influence of temperature on the development and reproduction of Cinara cedri (Hemiptera: Aphidoidea: Lachninae)

“…Temperature, as an important ecological factor, has a significant impact on the development duration, fecundity and population dynamics of insects (Campbell et al ., 1974; Özder and Ozgur, 2013; Cao et al ., 2018). A large number studies have shown that the developmental duration of insects shortens with the increase of temperature over the appropriate temperature range (Cui et al ., 2018; Abu Alloush, 2019). In this study, developmental duration of each developmental stage of C. cedri was shortened as the temperature increased from 10 to 30°C.…”