Thermal requirements, life table and estimate of number of Trichogramma galloi in eggs of Neoleucinodes elegantalis

Abstract

The Neoleucinodes elegantalis is considered one of the main tomato pests, as it directly damages the fruit. The use of the parasitoid Trichogramma galloi in the management of N. elegantalis requires studies for knowledge of parasitoid behavior regarding the pest to be managed. The objective of this research was to evaluate the behavior of T. galloi for the management of N. elegantalis, through thermal requirements and of life table. According to the results, the fetal develop of T. galloi starts when the temperature remains above 8.02 ± 0.2°C and the heat buildup for complete development is of 159.74 ± 3.88°C degree days (DD). The number of generations of T. galloi was estimated to the five largest municipalities from the Espírito Santo state

Life and Survival Table of Trichogramma Atopovirilia Oatman & Platner (Hymenoptera: Trichogrammatidae) in Eggs of Anticarsia Gemmatalis Hübner (Lepidoptera: Noctuidae), Subjected to Three Food Sources

“…This demonstrates that resistant soybeans provided The results presented of T. atopovirilia parasitism in A. gemmatalis eggs from breeding with resistant and susceptible plants show us that the plant effect was not observed (transovarian action). In the three host breeding systems, there was no significant difference in parameters related to parasitism, which in a biological control program is the most desirable characteristic of the parasitoid to be used (Herz et al, 2007;Wakeil et al, 2008;Dias et al, 2010;Moraes and Foerster, 2015;Melo Fragoso et al, 2019).…”

“…The trans-ovarian action of possible compounds from plants did not interfere with the parasitism of T. atopovirilia as it presented high quality for parasitism regardless of the food substrate. The individual's ability to allocate eggs from its descendants to a host is also linked to the parasitoid's ability to recognize the quality of the host's egg (Pratissoli et al, 2005a;Jeong and Stouthamer, 2006;Kapranas et al, 2008;Carvalho et al, 2015;Melo Fragoso et al, 2019).…”

“…To construct the life table, the results of population dynamics of T. atopovirilia were taken into account, as the life table is the best way to evaluate possible negative impacts of external factors on the performance of natural enemies (Pratissoli et al, 2004a;Golizadeh et al, 2008;Carvalho et al, 2015;Melo Fragoso et al, 2019).…”

“…Among these, biological control is one of the best options, as it can be shared with all types of management techniques. The use of egg parasitoids of the genus Trichogramma is a viable method, since it occurs in almost all agricultural regions of Brazil, in addition to its mass rearing being an easy and cheap technique, it has excellent control efficiency in eggs of Lepidoptera (Soares et al, 2007;Melo Fragoso et al, 2019;Elwakil et al, 2022;Freitas Bueno et al, 2024).…”

“…(Golizadeh et al, 2008). Thus, the growth potential of arthropod populations can be predicted to establish pest control in Eggs of Anticarsia Gemmatalis Hübner (Lepidoptera: Noctuidae), Subjected to Three Food Sources ___________________________________________________________________________ practices and to evaluate possible negative impacts of external factors on the performance of natural enemies by this analysis method (Pratissoli et al, 2004a;Melo Fragoso, et al, 2019).…”