The effect of ambient temperature on the development of cotton bollworm (Helicoverpa armigera Hübner, 1808)

Abstract

Dependence of individual development stages of cotton bollworm, Helicoverpa armigera, on ambient temperature was studied in laboratory conditions. Temperature-controlled chambers at constant temperatures of 20, 25 and 30°C were used, and the thermal thresholds were established by means of linear regression. The following temperature limits were determined: the lower thermal threshold for the development of H. armigera eggs is 14.8°C, that for larvae is 11.3°C, and that for development of pupae is 8.2°C. The thermal constant for the development of eggs is 64.1 day-degrees, that for larvae is 344.8 day-degrees, and that for the development of pupae is 222.2 day-degrees. The lower thermal threshold for total development of Helicoverpa armigera is 11.5°C and the thermal constant is 625.0 day-degrees.

Population and damage projection of Spodoptera litura (F.) on peanuts (Arachis hypogaea L.) under different conditions using the age‐stage, two‐sex life table

“…Because insects are ectothermic organisms, their developmental rates are affected by temperature . Their responses to fluctuating and constant temperature, however, can vary widely.…”

“…Because its population dynamics and damage vary with climate, crop and agro‐practice, its management has always been a difficult task. Among abiotic factors, temperature and photoperiods are of major importance . The effect of abiotic factors on the growth rate of a population can be appropriately assessed using life table data collected under different conditions.…”

Effect of modified meridic diet on the development and growth of tomato fruitworm Helicoverpa armigera (Lepidoptera: Noctuidae)

“…The nutritive value of diets greatly influences the rate of pupation and weight possibly due to healthy growth and lower mortality of larvae during development on a modified diet. Barteková and Praslička (2006) observed an average pupal stage of 18.4 days at 20°C, 14.1 days at 25°C and 10.1 days at 30°C. Similarly, the cotton bollworm pupal stage lasts for 14 days if no diapause occurs in pupae under natural conditions (Matlák 1995; Vlčková 1999, 2000).…”

Effects of thermophotoperiod on growth parameters of Helicoverpa armigera

“…Several studies have been conducted on the effect of constant temperatures on growth parameters (Twine, 1978; Kay, 1981; Qureshi et al., 1999; Jallow & Matsumura, 2001; Liu et al., 2004; Bartekova & Praslicka, 2006; Mironidis & Savopoulou‐Soultani, 2008) and on diapause induction (Roome, 1979; Wilson et al., 1979; Kay, 1982; Jiang et al., 1999; Qureshi et al., 1999, 2000; Shimizu & Fujisaki, 2002, 2006; Kurban et al., 2005, 2007; Shimizu et al., 2006; Liu et al., 2010) of H. armigera reared either on host plant material or on artificial diet. However, H. armigera , like many other insects, is subjected to daily cycles of light and dark, to seasonal cycles of climatic change, to cycles of feeding (correlated with the presence or absence of food), and to temperature or humidity cycles.…”