Performance of <i>Trichogramma chilonis</i> under different rearing temperatures

Abstract

&lt;p&gt;Influence of rearing temperature on biological parameters of &lt;em&gt;Trichogramma chilonis&lt;/em&gt; (Ishii) was studied under laboratory conditions during 2017-18. Maximum per cent parasitization and adult emergence of 74.2% and 78.91%, respectively was observed at 25+1°C followed by 71.8% and 65.21 % at 30±1°C. However, the temperature of 40+1°C was found detrimental to&lt;em&gt; T. chilonis&lt;/em&gt; recording only 20.2% parasitization, the progeny of which has failed to complete the development and the adults could not emerge out. The developmental period was maximum (8 days) at 25+1°C. Also, maximum male and female longevity (5 and 12 Days, respectively) and maximum mean per day fecundity of 17 eggs per female/day were recorded at 25+1°C. The progeny was found to be male dominated with a female-male ratio of &lt;em&gt;T. chilonis&lt;/em&gt; to be 0.69, 0.74 and 0.96 at 25, 30 and 35°C, respectively.&lt;/p&gt;

Biology of Spodoptera Eridania (Cramer, 1792) (Lepidoptera: Noctuidae) at Different Temperatures and Diet Sources

“…2 Insects, as a form of adaptability, have lower and upper thermal limits, from which survival does not occur outside this range (Garcia and Parra 2021;Pereira, Diniz, and Parra 2023). Through the parameters evaluated in our research, it was evident that for S. eridania the upper thermal limit is 35 ºC, the same was found by other authors (Park et al 2015;Maharjan et al 2017;Zhu et al 2017;Paes et al 2018;Lacerda et al 2019;Waghmare et al 2021). This fact may be related to the fact that at high temperatures the metabolic processes of insects increase, and thus their development time is reduced, however, at low temperatures these processes decrease, which prolongs the insect's development time (Martins et al 2016;Marchioro and Foerster 2011).…”