Alternating temperatures affect the performance of Trichogramma species.
Bottom Line: Fecundity and longevity of parasitoids were significantly reduced under high temperature shocks to egg-laying females.However, the effect was more severe in eggs.Overall, daily short-term temperature shocks to different developmental stages of parasitoids showed radical effects on emergence, fecundity, longevity, and sex ratio of the progeny.
Affiliation: Division of Entomology, ICAR Research Complex for NEH Region, Umiam, Meghalaya-793103, India firstname.lastname@example.org.Show MeSH
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Mentions: Female longevity of parasitoids (G0 and F0). The life spans of female T. poliae (G0) and T. chilonis (G0) were considerably reduced (F = 53.73, P < 0.01, df = 5. and F = 49.97, P < 0.01, df = 5, respectively) from short-term exposure to 40° C temperature shocks (Figure 5). Longevity of female T. poliae (G0) and T. chilonis (G0) was higher when exposed to higher temperatures at the pupal stage (F = 11.40, P < 0.01, df = 2, and F = 7.54, P < 0.01, df = 2, respectively) than the larval and egg stage. Increased intensity and frequency of thermal shocks caused significant effects on longevity of T. poliae (F0) (F = 16.89, P < 0.01, df = 5) and T. chilonis (F0) (F = 53.40, P < 0.01, df = 5) (Figure 6).
Affiliation: Division of Entomology, ICAR Research Complex for NEH Region, Umiam, Meghalaya-793103, India email@example.com.