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Biology and thermal requirements Trichogramma pratissolii Querino Zucchi Hymenoptera Trichogrammatidae on alternative hosts Biologia e exigencias termicas de Trichogramma pratissolii Querino Zucchi Hymenoptera Trichogrammatidae em hospedeiros alternativos



Biology and thermal requirements Trichogramma pratissolii Querino Zucchi Hymenoptera Trichogrammatidae on alternative hosts Biologia e exigencias termicas de Trichogramma pratissolii Querino Zucchi Hymenoptera Trichogrammatidae em hospedeiros alternativos



Neotropical Entomology. May-June; 353: 377-381



The objective of this work was to study the biology and determine the thermal requirements of Trichogramma pratissolii Querino & Zucchi reared on Anagasta kuehniella Zeller (Lepidoptera: Pyralidae) and Concyra cephalonica Stainton (Lepidoptera: Pyralidae) at 15, 18. 21, 24, 27, 30 and 33deg. C. The highest percentage of emergence of T pratissolii was obtained at 27deg. C on A. kuehniella and from 24deg. C to 30deg. C on C. cephalonica. The lower threshold temperature (Tb) and the thermal requirement (K) of T pratissolii were 12.59deg. C (Tb) and 122.85 degree-days (K) when reared on A. kuehniella and 11.73deg. C (Tb) and 139.80 decyree-days (K) on C. cephalonica. These results indicate that both A. kuehniella and C. cephalonica are suitable hosts for T pratissolii mass rearing. The optimal temperature for the immature development and emergence of T pratissolii on A. kuehniella was 27deg. C and 24deg. C to 30deg. C on C cephalonica.

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