The aim of this work was the determination of the influence of the size of grain moth eggs on qualitative characteristics of Trichogramma evanescens (Hymenoptera: Trichogrammatidae) from the second to the seventh generations. The indicators of T. evanescens determine its ability to provide effective plant protection. Using selected large eggs of grain moth T. evanescens reproduction was carried out. As controls, eggs that had only been cleaned were used. These studies were performed with T. evanescens from second to seventh generations. The correlation between the size of grain moth eggs and indicators of T. evanescens such as the level of search ability, the level of regeneration of individuals, the relative number of females, the level of deformed individuals, the lifespan and the fecundity of females were determined. The influence of the size of grain moth eggs on the T. evanescens class was determined. It was found that the use of large grain moth eggs for the production of T. evanescens allowed for maintaining its first class quality from the second to the seventh generations. Trichogramma evanescens from grain moth eggs, which had only been cleaned, had first class quality only up to the fourth generation.
The authors have declared that no conflict of interests exist.
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