Changes in Biological Characteristics ofTrichogramma pretiosum(Hym.: Trichogrammatidae) Reared on Eggs ofAnagasta kuehniella(Lep.: Pyralidae) for 23 Generations

Suitability of Chinese oak silkworm eggs for the multigenerational rearing of the parasitoid Trichogramma leucaniae

“…generations to change their preferences and other traits to adapt to the new hosts and exhibit high parasitic capacities [43]. In our study, however, the unsuitability of T. leucaniae was found to increase with increasing generations after being successively reared on A. pernyi for 4 generations.…”

“…The same phenomenon also existed in the continuous rearing of Trichogramma on other alternative hosts. For instance, after rearing on Anagasta kuehniella (Zeller) for 32 generations, the parasitism rate of T. pretiosum decreased and the developmental time was prolonged [43]. Host unsuitability is also exhibited in the agility of parasitoids.…”

Transgenic Insecticidal Crops and Natural Enemies: A Detailed Review of Laboratory Studies

“…in the present study, the proportion of females (i.e., sex ratio) was also high, which is highly desired in biological control programs, because it indicates a higher potential to effectively control pests (Pratissoli et al 2004b;Wakeil et al 2008). Longevity of females is important for biological control programs, because parasitoids that live longer can be more effective natural enemies and remain in culture for longer periods than short-lived individuals (Sorensen et al 2012).…”

Parasitism Capacity of Trichogramma pretiosum and Trichogramma acacioi (Hym.: Trichogrammatidae) on eggs of Sitotroga cerealella (Lep.: Gelechiidae)

“…parasitoids in programs of biological control of Nipteria panacea Tierry-Mieg (Lepidoptera: Geometridae) is promising because two species of this genus have been found parasitizing eggs of this pest in field conditions (Pratissoli and Fornazier, 1999). The study of parasitism capacity before the species can be released in biological control programs is an important step (Oliveira et al, 2000;Pratissoli et al, 2004a;Pratissoli et al, 2004c;Soares et al, 2007). Daily parasitism and parasitism period of Trichogramma may vary among the species, lineage, host, temperature and climatic conditions (Pratissoli et al, 2004a;Pratissoli et al, 2004c;Oliveira et al, 2005).…”

“…The study of parasitism capacity before the species can be released in biological control programs is an important step (Oliveira et al, 2000;Pratissoli et al, 2004a;Pratissoli et al, 2004c;Soares et al, 2007). Daily parasitism and parasitism period of Trichogramma may vary among the species, lineage, host, temperature and climatic conditions (Pratissoli et al, 2004a;Pratissoli et al, 2004c;Oliveira et al, 2005). Many species of this genus present maximum fecundity around 25°C with decreasing values at extreme temperatures (Pratissoli et al, 2004b;Pratissoli et al, 2005a).…”