Influence of temperature on the biological parameters of the anholocyclic species Cinara tujafilina (Hemiptera: Aphidoidea)

摘要

Aphids are a good model to study insect reaction to habitat change. Temperature is one of the main factors that influences insects. This paper examines the influence of temperature on developmental stages, fecundity, survival rate and demographic parameters of Cinara tujafilina (Hemiptera: Aphidoidea, Lachnidae), connected with decorative plants of the Cupressaceae family. C. tujafilina was reared in a laboratory on T. orientalis at five constant temperatures of 10, 15, 20, 25 and 28A degrees C, 70% humidity and 14L:10D. The pre-reproduction stage varied from 7 at 25A degrees C to 19 days at 10A degrees C. Developmental threshold was assigned at 3.5A degrees C. The longest reproduction stage for the aphids developing was recorded at 25A degrees C, namely 33 days, while the shortest, at the temperature of 10A degrees C, lasted 8 days. At 25A degrees C this species is characterised by the shortest pre-reproduction stage, the highest fecundity, the highest survival rate and the highest demographic parameters, particularly r(m) (0.17). The results suggest that the optimal temperature for the species is 25A degrees C, and indicate that climatic change will favourably influence its development and increase its role as a pest of decorative plants.