Open AccessBiological characteristics of Trichogramma pretiosum Riley, 1879 (Hymenoptera: Trichogrammatidae) under temperature stress by successive generations
Author(s) -
Luis Moreira de Araújo,
Hugo Bolsoni Zago,
Alixelhe Pacheco Damascena,
Luana Viana Faria,
Aléxia Gonçalves Pereira,
Fernando Zanotti Madalon,
José Romário de Carvalho,
Dirceu Pratissoli
Publication year - 2021
Publication title -
acta brasiliensis
Language(s) - English
Resource type - Journals
eISSN - 2526-4338
pISSN - 2526-432X
DOI - 10.22571/2526-4338484
Subject(s) - trichogrammatidae , hymenoptera , biology , longevity , adaptability , trichogramma , biological pest control , heat stress , pest analysis , sex ratio , toxicology , parasitoid , horticulture , zoology , ecology , medicine , genetics , population , environmental health
The objective of this study was to evaluate the biological characteristics of Trichogramma pretiosum (Riley 1879) under room temperature and temperature stress by successive generations. The evaluation was carried out in split-plot in the time. The temperature (25 ºC – room temperature and 33 ºC – temperature stress) was the Factor 1 and the Generations (n = 15) were the Factor 2. The biological characteristics evaluated were: longevity; posterior tibia length; number of parasitized eggs; emergence; egg-adult period; sexual ratio and deformed individuals. The increase in temperature, from the first generations of T pretiosum, caused an influence in all observed variables. However, for the emergence and sex ratio variables, there was no significant difference between heat stress and control (room temperature) as of the 14th generation, which suggests an adaptability of the species. This adaptability may imply obtaining more aggressive natural enemies in relation to their host (insect pest) and consequently in the greater efficiency of biological control.